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Harald Pichler 2017-10-20 10:47:48 +02:00
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Thank you for opening an issue on an Adafruit Arduino library repository. To
improve the speed of resolution please review the following guidelines and
common troubleshooting steps below before creating the issue:
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the forums at http://forums.adafruit.com to ask questions and troubleshoot why
something isn't working as expected. In many cases the problem is a common issue
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are meant for known defects in the code. If you don't know if there is a defect
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If you're sure this issue is a defect in the code and checked the steps above
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You may delete the guideline and text above to just leave the following details:
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VERSION HERE**
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Thank you for creating a pull request to contribute to Adafruit's GitHub code!
Before you open the request please review the following guidelines and tips to
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/* DHT library
MIT license
written by Adafruit Industries
*/
#include "DHT.h"
#define MIN_INTERVAL 2000
DHT::DHT(uint8_t pin, uint8_t type, uint8_t count) {
_pin = pin;
_type = type;
#ifdef __AVR
_bit = digitalPinToBitMask(pin);
_port = digitalPinToPort(pin);
#endif
_maxcycles = microsecondsToClockCycles(1000); // 1 millisecond timeout for
// reading pulses from DHT sensor.
// Note that count is now ignored as the DHT reading algorithm adjusts itself
// basd on the speed of the processor.
}
void DHT::begin(void) {
// set up the pins!
pinMode(_pin, INPUT_PULLUP);
// Using this value makes sure that millis() - lastreadtime will be
// >= MIN_INTERVAL right away. Note that this assignment wraps around,
// but so will the subtraction.
_lastreadtime = -MIN_INTERVAL;
DEBUG_PRINT("Max clock cycles: "); DEBUG_PRINTLN(_maxcycles, DEC);
}
//boolean S == Scale. True == Fahrenheit; False == Celcius
float DHT::readTemperature(bool S, bool force) {
float f = NAN;
if (read(force)) {
switch (_type) {
case DHT11:
f = data[2];
if(S) {
f = convertCtoF(f);
}
break;
case DHT22:
case DHT21:
f = data[2] & 0x7F;
f *= 256;
f += data[3];
f *= 0.1;
if (data[2] & 0x80) {
f *= -1;
}
if(S) {
f = convertCtoF(f);
}
break;
}
}
return f;
}
float DHT::convertCtoF(float c) {
return c * 1.8 + 32;
}
float DHT::convertFtoC(float f) {
return (f - 32) * 0.55555;
}
float DHT::readHumidity(bool force) {
float f = NAN;
if (read()) {
switch (_type) {
case DHT11:
f = data[0];
break;
case DHT22:
case DHT21:
f = data[0];
f *= 256;
f += data[1];
f *= 0.1;
break;
}
}
return f;
}
//boolean isFahrenheit: True == Fahrenheit; False == Celcius
float DHT::computeHeatIndex(float temperature, float percentHumidity, bool isFahrenheit) {
// Using both Rothfusz and Steadman's equations
// http://www.wpc.ncep.noaa.gov/html/heatindex_equation.shtml
float hi;
if (!isFahrenheit)
temperature = convertCtoF(temperature);
hi = 0.5 * (temperature + 61.0 + ((temperature - 68.0) * 1.2) + (percentHumidity * 0.094));
if (hi > 79) {
hi = -42.379 +
2.04901523 * temperature +
10.14333127 * percentHumidity +
-0.22475541 * temperature*percentHumidity +
-0.00683783 * pow(temperature, 2) +
-0.05481717 * pow(percentHumidity, 2) +
0.00122874 * pow(temperature, 2) * percentHumidity +
0.00085282 * temperature*pow(percentHumidity, 2) +
-0.00000199 * pow(temperature, 2) * pow(percentHumidity, 2);
if((percentHumidity < 13) && (temperature >= 80.0) && (temperature <= 112.0))
hi -= ((13.0 - percentHumidity) * 0.25) * sqrt((17.0 - abs(temperature - 95.0)) * 0.05882);
else if((percentHumidity > 85.0) && (temperature >= 80.0) && (temperature <= 87.0))
hi += ((percentHumidity - 85.0) * 0.1) * ((87.0 - temperature) * 0.2);
}
return isFahrenheit ? hi : convertFtoC(hi);
}
boolean DHT::read(bool force) {
// Check if sensor was read less than two seconds ago and return early
// to use last reading.
uint32_t currenttime = millis();
if (!force && ((currenttime - _lastreadtime) < 2000)) {
return _lastresult; // return last correct measurement
}
_lastreadtime = currenttime;
// Reset 40 bits of received data to zero.
data[0] = data[1] = data[2] = data[3] = data[4] = 0;
// Send start signal. See DHT datasheet for full signal diagram:
// http://www.adafruit.com/datasheets/Digital%20humidity%20and%20temperature%20sensor%20AM2302.pdf
// Go into high impedence state to let pull-up raise data line level and
// start the reading process.
digitalWrite(_pin, HIGH);
delay(250);
// First set data line low for 20 milliseconds.
pinMode(_pin, OUTPUT);
digitalWrite(_pin, LOW);
delay(20);
uint32_t cycles[80];
{
// Turn off interrupts temporarily because the next sections are timing critical
// and we don't want any interruptions.
InterruptLock lock;
// End the start signal by setting data line high for 40 microseconds.
digitalWrite(_pin, HIGH);
delayMicroseconds(40);
// Now start reading the data line to get the value from the DHT sensor.
pinMode(_pin, INPUT_PULLUP);
delayMicroseconds(10); // Delay a bit to let sensor pull data line low.
// First expect a low signal for ~80 microseconds followed by a high signal
// for ~80 microseconds again.
if (expectPulse(LOW) == 0) {
DEBUG_PRINTLN(F("Timeout waiting for start signal low pulse."));
_lastresult = false;
return _lastresult;
}
if (expectPulse(HIGH) == 0) {
DEBUG_PRINTLN(F("Timeout waiting for start signal high pulse."));
_lastresult = false;
return _lastresult;
}
// Now read the 40 bits sent by the sensor. Each bit is sent as a 50
// microsecond low pulse followed by a variable length high pulse. If the
// high pulse is ~28 microseconds then it's a 0 and if it's ~70 microseconds
// then it's a 1. We measure the cycle count of the initial 50us low pulse
// and use that to compare to the cycle count of the high pulse to determine
// if the bit is a 0 (high state cycle count < low state cycle count), or a
// 1 (high state cycle count > low state cycle count). Note that for speed all
// the pulses are read into a array and then examined in a later step.
for (int i=0; i<80; i+=2) {
cycles[i] = expectPulse(LOW);
cycles[i+1] = expectPulse(HIGH);
}
} // Timing critical code is now complete.
// Inspect pulses and determine which ones are 0 (high state cycle count < low
// state cycle count), or 1 (high state cycle count > low state cycle count).
for (int i=0; i<40; ++i) {
uint32_t lowCycles = cycles[2*i];
uint32_t highCycles = cycles[2*i+1];
if ((lowCycles == 0) || (highCycles == 0)) {
DEBUG_PRINTLN(F("Timeout waiting for pulse."));
_lastresult = false;
return _lastresult;
}
data[i/8] <<= 1;
// Now compare the low and high cycle times to see if the bit is a 0 or 1.
if (highCycles > lowCycles) {
// High cycles are greater than 50us low cycle count, must be a 1.
data[i/8] |= 1;
}
// Else high cycles are less than (or equal to, a weird case) the 50us low
// cycle count so this must be a zero. Nothing needs to be changed in the
// stored data.
}
DEBUG_PRINTLN(F("Received:"));
DEBUG_PRINT(data[0], HEX); DEBUG_PRINT(F(", "));
DEBUG_PRINT(data[1], HEX); DEBUG_PRINT(F(", "));
DEBUG_PRINT(data[2], HEX); DEBUG_PRINT(F(", "));
DEBUG_PRINT(data[3], HEX); DEBUG_PRINT(F(", "));
DEBUG_PRINT(data[4], HEX); DEBUG_PRINT(F(" =? "));
DEBUG_PRINTLN((data[0] + data[1] + data[2] + data[3]) & 0xFF, HEX);
// Check we read 40 bits and that the checksum matches.
if (data[4] == ((data[0] + data[1] + data[2] + data[3]) & 0xFF)) {
_lastresult = true;
return _lastresult;
}
else {
DEBUG_PRINTLN(F("Checksum failure!"));
_lastresult = false;
return _lastresult;
}
}
// Expect the signal line to be at the specified level for a period of time and
// return a count of loop cycles spent at that level (this cycle count can be
// used to compare the relative time of two pulses). If more than a millisecond
// ellapses without the level changing then the call fails with a 0 response.
// This is adapted from Arduino's pulseInLong function (which is only available
// in the very latest IDE versions):
// https://github.com/arduino/Arduino/blob/master/hardware/arduino/avr/cores/arduino/wiring_pulse.c
uint32_t DHT::expectPulse(bool level) {
uint32_t count = 0;
// On AVR platforms use direct GPIO port access as it's much faster and better
// for catching pulses that are 10's of microseconds in length:
#ifdef __AVR
uint8_t portState = level ? _bit : 0;
while ((*portInputRegister(_port) & _bit) == portState) {
if (count++ >= _maxcycles) {
return 0; // Exceeded timeout, fail.
}
}
// Otherwise fall back to using digitalRead (this seems to be necessary on ESP8266
// right now, perhaps bugs in direct port access functions?).
#else
while (digitalRead(_pin) == level) {
if (count++ >= _maxcycles) {
return 0; // Exceeded timeout, fail.
}
}
#endif
return count;
}

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/* DHT library
MIT license
written by Adafruit Industries
*/
#ifndef DHT_H
#define DHT_H
#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
// Uncomment to enable printing out nice debug messages.
//#define DHT_DEBUG
// Define where debug output will be printed.
#define DEBUG_PRINTER Serial
// Setup debug printing macros.
#ifdef DHT_DEBUG
#define DEBUG_PRINT(...) { DEBUG_PRINTER.print(__VA_ARGS__); }
#define DEBUG_PRINTLN(...) { DEBUG_PRINTER.println(__VA_ARGS__); }
#else
#define DEBUG_PRINT(...) {}
#define DEBUG_PRINTLN(...) {}
#endif
// Define types of sensors.
#define DHT11 11
#define DHT22 22
#define DHT21 21
#define AM2301 21
class DHT {
public:
DHT(uint8_t pin, uint8_t type, uint8_t count=6);
void begin(void);
float readTemperature(bool S=false, bool force=false);
float convertCtoF(float);
float convertFtoC(float);
float computeHeatIndex(float temperature, float percentHumidity, bool isFahrenheit=true);
float readHumidity(bool force=false);
boolean read(bool force=false);
private:
uint8_t data[5];
uint8_t _pin, _type;
#ifdef __AVR
// Use direct GPIO access on an 8-bit AVR so keep track of the port and bitmask
// for the digital pin connected to the DHT. Other platforms will use digitalRead.
uint8_t _bit, _port;
#endif
uint32_t _lastreadtime, _maxcycles;
bool _lastresult;
uint32_t expectPulse(bool level);
};
class InterruptLock {
public:
InterruptLock() {
noInterrupts();
}
~InterruptLock() {
interrupts();
}
};
#endif

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// DHT Temperature & Humidity Unified Sensor Library
// Copyright (c) 2014 Adafruit Industries
// Author: Tony DiCola
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include "DHT_U.h"
DHT_Unified::DHT_Unified(uint8_t pin, uint8_t type, uint8_t count, int32_t tempSensorId, int32_t humiditySensorId):
_dht(pin, type, count),
_type(type),
_temp(this, tempSensorId),
_humidity(this, humiditySensorId)
{}
void DHT_Unified::begin() {
_dht.begin();
}
void DHT_Unified::setName(sensor_t* sensor) {
switch(_type) {
case DHT11:
strncpy(sensor->name, "DHT11", sizeof(sensor->name) - 1);
break;
case DHT21:
strncpy(sensor->name, "DHT21", sizeof(sensor->name) - 1);
break;
case DHT22:
strncpy(sensor->name, "DHT22", sizeof(sensor->name) - 1);
break;
default:
// TODO: Perhaps this should be an error? However main DHT library doesn't enforce
// restrictions on the sensor type value. Pick a generic name for now.
strncpy(sensor->name, "DHT?", sizeof(sensor->name) - 1);
break;
}
sensor->name[sizeof(sensor->name)- 1] = 0;
}
void DHT_Unified::setMinDelay(sensor_t* sensor) {
switch(_type) {
case DHT11:
sensor->min_delay = 1000000L; // 1 second (in microseconds)
break;
case DHT21:
sensor->min_delay = 2000000L; // 2 seconds (in microseconds)
break;
case DHT22:
sensor->min_delay = 2000000L; // 2 seconds (in microseconds)
break;
default:
// Default to slowest sample rate in case of unknown type.
sensor->min_delay = 2000000L; // 2 seconds (in microseconds)
break;
}
}
DHT_Unified::Temperature::Temperature(DHT_Unified* parent, int32_t id):
_parent(parent),
_id(id)
{}
bool DHT_Unified::Temperature::getEvent(sensors_event_t* event) {
// Clear event definition.
memset(event, 0, sizeof(sensors_event_t));
// Populate sensor reading values.
event->version = sizeof(sensors_event_t);
event->sensor_id = _id;
event->type = SENSOR_TYPE_AMBIENT_TEMPERATURE;
event->timestamp = millis();
event->temperature = _parent->_dht.readTemperature();
return true;
}
void DHT_Unified::Temperature::getSensor(sensor_t* sensor) {
// Clear sensor definition.
memset(sensor, 0, sizeof(sensor_t));
// Set sensor name.
_parent->setName(sensor);
// Set version and ID
sensor->version = DHT_SENSOR_VERSION;
sensor->sensor_id = _id;
// Set type and characteristics.
sensor->type = SENSOR_TYPE_AMBIENT_TEMPERATURE;
_parent->setMinDelay(sensor);
switch (_parent->_type) {
case DHT11:
sensor->max_value = 50.0F;
sensor->min_value = 0.0F;
sensor->resolution = 2.0F;
break;
case DHT21:
sensor->max_value = 80.0F;
sensor->min_value = -40.0F;
sensor->resolution = 0.1F;
break;
case DHT22:
sensor->max_value = 125.0F;
sensor->min_value = -40.0F;
sensor->resolution = 0.1F;
break;
default:
// Unknown type, default to 0.
sensor->max_value = 0.0F;
sensor->min_value = 0.0F;
sensor->resolution = 0.0F;
break;
}
}
DHT_Unified::Humidity::Humidity(DHT_Unified* parent, int32_t id):
_parent(parent),
_id(id)
{}
bool DHT_Unified::Humidity::getEvent(sensors_event_t* event) {
// Clear event definition.
memset(event, 0, sizeof(sensors_event_t));
// Populate sensor reading values.
event->version = sizeof(sensors_event_t);
event->sensor_id = _id;
event->type = SENSOR_TYPE_RELATIVE_HUMIDITY;
event->timestamp = millis();
event->relative_humidity = _parent->_dht.readHumidity();
return true;
}
void DHT_Unified::Humidity::getSensor(sensor_t* sensor) {
// Clear sensor definition.
memset(sensor, 0, sizeof(sensor_t));
// Set sensor name.
_parent->setName(sensor);
// Set version and ID
sensor->version = DHT_SENSOR_VERSION;
sensor->sensor_id = _id;
// Set type and characteristics.
sensor->type = SENSOR_TYPE_RELATIVE_HUMIDITY;
_parent->setMinDelay(sensor);
switch (_parent->_type) {
case DHT11:
sensor->max_value = 80.0F;
sensor->min_value = 20.0F;
sensor->resolution = 5.0F;
break;
case DHT21:
sensor->max_value = 100.0F;
sensor->min_value = 0.0F;
sensor->resolution = 0.1F;
break;
case DHT22:
sensor->max_value = 100.0F;
sensor->min_value = 0.0F;
sensor->resolution = 0.1F;
break;
default:
// Unknown type, default to 0.
sensor->max_value = 0.0F;
sensor->min_value = 0.0F;
sensor->resolution = 0.0F;
break;
}
}

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// DHT Temperature & Humidity Unified Sensor Library
// Copyright (c) 2014 Adafruit Industries
// Author: Tony DiCola
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#ifndef DHT_U_H
#define DHT_U_H
#include <Adafruit_Sensor.h>
#include <DHT.h>
#define DHT_SENSOR_VERSION 1
class DHT_Unified {
public:
DHT_Unified(uint8_t pin, uint8_t type, uint8_t count=6, int32_t tempSensorId=-1, int32_t humiditySensorId=-1);
void begin();
class Temperature : public Adafruit_Sensor {
public:
Temperature(DHT_Unified* parent, int32_t id);
bool getEvent(sensors_event_t* event);
void getSensor(sensor_t* sensor);
private:
DHT_Unified* _parent;
int32_t _id;
};
class Humidity : public Adafruit_Sensor {
public:
Humidity(DHT_Unified* parent, int32_t id);
bool getEvent(sensors_event_t* event);
void getSensor(sensor_t* sensor);
private:
DHT_Unified* _parent;
int32_t _id;
};
Temperature temperature() {
return _temp;
}
Humidity humidity() {
return _humidity;
}
private:
DHT _dht;
uint8_t _type;
Temperature _temp;
Humidity _humidity;
void setName(sensor_t* sensor);
void setMinDelay(sensor_t* sensor);
};
#endif

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This is an Arduino library for the DHT series of low cost temperature/humidity sensors.
Tutorial: https://learn.adafruit.com/dht
To download. click the DOWNLOADS button in the top right corner, rename the uncompressed folder DHT. Check that the DHT folder contains DHT.cpp and DHT.h. Place the DHT library folder your <arduinosketchfolder>/libraries/ folder. You may need to create the libraries subfolder if its your first library. Restart the IDE.
# Adafruit DHT Humidity & Temperature Unified Sensor Library
This library also includes an optional class for the
[DHT humidity and temperature sensor](https://learn.adafruit.com/dht/overview)
which is designed to work with the [Adafruit unified sensor library](https://learn.adafruit.com/using-the-adafruit-unified-sensor-driver/introduction).
You must have the following Arduino libraries installed to use this class:
- [Adafruit Unified Sensor Library](https://github.com/adafruit/Adafruit_Sensor)

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// DHT Temperature & Humidity Sensor
// Unified Sensor Library Example
// Written by Tony DiCola for Adafruit Industries
// Released under an MIT license.
// Depends on the following Arduino libraries:
// - Adafruit Unified Sensor Library: https://github.com/adafruit/Adafruit_Sensor
// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library
#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>
#define DHTPIN 2 // Pin which is connected to the DHT sensor.
// Uncomment the type of sensor in use:
//#define DHTTYPE DHT11 // DHT 11
#define DHTTYPE DHT22 // DHT 22 (AM2302)
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
// See guide for details on sensor wiring and usage:
// https://learn.adafruit.com/dht/overview
DHT_Unified dht(DHTPIN, DHTTYPE);
uint32_t delayMS;
void setup() {
Serial.begin(9600);
// Initialize device.
dht.begin();
Serial.println("DHTxx Unified Sensor Example");
// Print temperature sensor details.
sensor_t sensor;
dht.temperature().getSensor(&sensor);
Serial.println("------------------------------------");
Serial.println("Temperature");
Serial.print ("Sensor: "); Serial.println(sensor.name);
Serial.print ("Driver Ver: "); Serial.println(sensor.version);
Serial.print ("Unique ID: "); Serial.println(sensor.sensor_id);
Serial.print ("Max Value: "); Serial.print(sensor.max_value); Serial.println(" *C");
Serial.print ("Min Value: "); Serial.print(sensor.min_value); Serial.println(" *C");
Serial.print ("Resolution: "); Serial.print(sensor.resolution); Serial.println(" *C");
Serial.println("------------------------------------");
// Print humidity sensor details.
dht.humidity().getSensor(&sensor);
Serial.println("------------------------------------");
Serial.println("Humidity");
Serial.print ("Sensor: "); Serial.println(sensor.name);
Serial.print ("Driver Ver: "); Serial.println(sensor.version);
Serial.print ("Unique ID: "); Serial.println(sensor.sensor_id);
Serial.print ("Max Value: "); Serial.print(sensor.max_value); Serial.println("%");
Serial.print ("Min Value: "); Serial.print(sensor.min_value); Serial.println("%");
Serial.print ("Resolution: "); Serial.print(sensor.resolution); Serial.println("%");
Serial.println("------------------------------------");
// Set delay between sensor readings based on sensor details.
delayMS = sensor.min_delay / 1000;
}
void loop() {
// Delay between measurements.
delay(delayMS);
// Get temperature event and print its value.
sensors_event_t event;
dht.temperature().getEvent(&event);
if (isnan(event.temperature)) {
Serial.println("Error reading temperature!");
}
else {
Serial.print("Temperature: ");
Serial.print(event.temperature);
Serial.println(" *C");
}
// Get humidity event and print its value.
dht.humidity().getEvent(&event);
if (isnan(event.relative_humidity)) {
Serial.println("Error reading humidity!");
}
else {
Serial.print("Humidity: ");
Serial.print(event.relative_humidity);
Serial.println("%");
}
}

69
examples/osd/arduino-trockenautomat/DHT-sensor-library-master/examples/DHTtester/DHTtester.ino Normal file
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// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
#include "DHT.h"
#define DHTPIN 2 // what digital pin we're connected to
// Uncomment whatever type you're using!
//#define DHTTYPE DHT11 // DHT 11
#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 5V!
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
// Initialize DHT sensor.
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors. This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN, DHTTYPE);
void setup() {
Serial.begin(9600);
Serial.println("DHTxx test!");
dht.begin();
}
void loop() {
// Wait a few seconds between measurements.
delay(2000);
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Read temperature as Fahrenheit (isFahrenheit = true)
float f = dht.readTemperature(true);
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
// Compute heat index in Fahrenheit (the default)
float hif = dht.computeHeatIndex(f, h);
// Compute heat index in Celsius (isFahreheit = false)
float hic = dht.computeHeatIndex(t, h, false);
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.print(" *C ");
Serial.print(f);
Serial.print(" *F\t");
Serial.print("Heat index: ");
Serial.print(hic);
Serial.print(" *C ");
Serial.print(hif);
Serial.println(" *F");
}

22
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###########################################
# Syntax Coloring Map For DHT-sensor-library
###########################################
###########################################
# Datatypes (KEYWORD1)
###########################################
DHT KEYWORD1
###########################################
# Methods and Functions (KEYWORD2)
###########################################
begin KEYWORD2
readTemperature KEYWORD2
convertCtoF KEYWORD2
convertFtoC KEYWORD2
computeHeatIndex KEYWORD2
readHumidity KEYWORD2
read KEYWORD2

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examples/osd/arduino-trockenautomat/DHT-sensor-library-master/library.properties Normal file
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name=DHT sensor library
version=1.3.0
author=Adafruit
maintainer=Adafruit <info@adafruit.com>
sentence=Arduino library for DHT11, DHT22, etc Temp & Humidity Sensors
paragraph=Arduino library for DHT11, DHT22, etc Temp & Humidity Sensors
category=Sensors
url=https://github.com/adafruit/DHT-sensor-library
architectures=*

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examples/osd/arduino-trockenautomat/DHT.cpp Normal file
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/* DHT library
MIT license
written by Adafruit Industries
*/
#include "DHT.h"
#define MIN_INTERVAL 2000
DHT::DHT(uint8_t pin, uint8_t type, uint8_t count) {
_pin = pin;
_type = type;
#ifdef __AVR
_bit = digitalPinToBitMask(pin);
_port = digitalPinToPort(pin);
#endif
_maxcycles = microsecondsToClockCycles(1000); // 1 millisecond timeout for
// reading pulses from DHT sensor.
// Note that count is now ignored as the DHT reading algorithm adjusts itself
// basd on the speed of the processor.
}
void DHT::begin(void) {
// set up the pins!
pinMode(_pin, INPUT_PULLUP);
// Using this value makes sure that millis() - lastreadtime will be
// >= MIN_INTERVAL right away. Note that this assignment wraps around,
// but so will the subtraction.
_lastreadtime = -MIN_INTERVAL;
DEBUG_PRINT("Max clock cycles: "); DEBUG_PRINTLN(_maxcycles, DEC);
}
//boolean S == Scale. True == Fahrenheit; False == Celcius
float DHT::readTemperature(bool S, bool force) {
float f = NAN;
if (read(force)) {
switch (_type) {
case DHT11:
f = data[2];
if(S) {
f = convertCtoF(f);
}
break;
case DHT22:
case DHT21:
f = data[2] & 0x7F;
f *= 256;
f += data[3];
f *= 0.1;
if (data[2] & 0x80) {
f *= -1;
}
if(S) {
f = convertCtoF(f);
}
break;
}
}
return f;
}
float DHT::convertCtoF(float c) {
return c * 1.8 + 32;
}
float DHT::convertFtoC(float f) {
return (f - 32) * 0.55555;
}
float DHT::readHumidity(bool force) {
float f = NAN;
if (read()) {
switch (_type) {
case DHT11:
f = data[0];
break;
case DHT22:
case DHT21:
f = data[0];
f *= 256;
f += data[1];
f *= 0.1;
break;
}
}
return f;
}
//boolean isFahrenheit: True == Fahrenheit; False == Celcius
float DHT::computeHeatIndex(float temperature, float percentHumidity, bool isFahrenheit) {
// Using both Rothfusz and Steadman's equations
// http://www.wpc.ncep.noaa.gov/html/heatindex_equation.shtml
float hi;
if (!isFahrenheit)
temperature = convertCtoF(temperature);
hi = 0.5 * (temperature + 61.0 + ((temperature - 68.0) * 1.2) + (percentHumidity * 0.094));
if (hi > 79) {
hi = -42.379 +
2.04901523 * temperature +
10.14333127 * percentHumidity +
-0.22475541 * temperature*percentHumidity +
-0.00683783 * pow(temperature, 2) +
-0.05481717 * pow(percentHumidity, 2) +
0.00122874 * pow(temperature, 2) * percentHumidity +
0.00085282 * temperature*pow(percentHumidity, 2) +
-0.00000199 * pow(temperature, 2) * pow(percentHumidity, 2);
if((percentHumidity < 13) && (temperature >= 80.0) && (temperature <= 112.0))
hi -= ((13.0 - percentHumidity) * 0.25) * sqrt((17.0 - abs(temperature - 95.0)) * 0.05882);
else if((percentHumidity > 85.0) && (temperature >= 80.0) && (temperature <= 87.0))
hi += ((percentHumidity - 85.0) * 0.1) * ((87.0 - temperature) * 0.2);
}
return isFahrenheit ? hi : convertFtoC(hi);
}
boolean DHT::read(bool force) {
// Check if sensor was read less than two seconds ago and return early
// to use last reading.
uint32_t currenttime = millis();
if (!force && ((currenttime - _lastreadtime) < 2000)) {
return _lastresult; // return last correct measurement
}
_lastreadtime = currenttime;
// Reset 40 bits of received data to zero.
data[0] = data[1] = data[2] = data[3] = data[4] = 0;
// Send start signal. See DHT datasheet for full signal diagram:
// http://www.adafruit.com/datasheets/Digital%20humidity%20and%20temperature%20sensor%20AM2302.pdf
// Go into high impedence state to let pull-up raise data line level and
// start the reading process.
digitalWrite(_pin, HIGH);
delay(250);
// First set data line low for 20 milliseconds.
pinMode(_pin, OUTPUT);
digitalWrite(_pin, LOW);
delay(20);
uint32_t cycles[80];
{
// Turn off interrupts temporarily because the next sections are timing critical
// and we don't want any interruptions.
InterruptLock lock;
// End the start signal by setting data line high for 40 microseconds.
digitalWrite(_pin, HIGH);
delayMicroseconds(40);
// Now start reading the data line to get the value from the DHT sensor.
pinMode(_pin, INPUT_PULLUP);
delayMicroseconds(10); // Delay a bit to let sensor pull data line low.
// First expect a low signal for ~80 microseconds followed by a high signal
// for ~80 microseconds again.
if (expectPulse(LOW) == 0) {
DEBUG_PRINTLN(F("Timeout waiting for start signal low pulse."));
_lastresult = false;
return _lastresult;
}
if (expectPulse(HIGH) == 0) {
DEBUG_PRINTLN(F("Timeout waiting for start signal high pulse."));
_lastresult = false;
return _lastresult;
}
// Now read the 40 bits sent by the sensor. Each bit is sent as a 50
// microsecond low pulse followed by a variable length high pulse. If the
// high pulse is ~28 microseconds then it's a 0 and if it's ~70 microseconds
// then it's a 1. We measure the cycle count of the initial 50us low pulse
// and use that to compare to the cycle count of the high pulse to determine
// if the bit is a 0 (high state cycle count < low state cycle count), or a
// 1 (high state cycle count > low state cycle count). Note that for speed all
// the pulses are read into a array and then examined in a later step.
for (int i=0; i<80; i+=2) {
cycles[i] = expectPulse(LOW);
cycles[i+1] = expectPulse(HIGH);
}
} // Timing critical code is now complete.
// Inspect pulses and determine which ones are 0 (high state cycle count < low
// state cycle count), or 1 (high state cycle count > low state cycle count).
for (int i=0; i<40; ++i) {
uint32_t lowCycles = cycles[2*i];
uint32_t highCycles = cycles[2*i+1];
if ((lowCycles == 0) || (highCycles == 0)) {
DEBUG_PRINTLN(F("Timeout waiting for pulse."));
_lastresult = false;
return _lastresult;
}
data[i/8] <<= 1;
// Now compare the low and high cycle times to see if the bit is a 0 or 1.
if (highCycles > lowCycles) {
// High cycles are greater than 50us low cycle count, must be a 1.
data[i/8] |= 1;
}
// Else high cycles are less than (or equal to, a weird case) the 50us low
// cycle count so this must be a zero. Nothing needs to be changed in the
// stored data.
}
DEBUG_PRINTLN(F("Received:"));
DEBUG_PRINT(data[0], HEX); DEBUG_PRINT(F(", "));
DEBUG_PRINT(data[1], HEX); DEBUG_PRINT(F(", "));
DEBUG_PRINT(data[2], HEX); DEBUG_PRINT(F(", "));
DEBUG_PRINT(data[3], HEX); DEBUG_PRINT(F(", "));
DEBUG_PRINT(data[4], HEX); DEBUG_PRINT(F(" =? "));
DEBUG_PRINTLN((data[0] + data[1] + data[2] + data[3]) & 0xFF, HEX);
// Check we read 40 bits and that the checksum matches.
if (data[4] == ((data[0] + data[1] + data[2] + data[3]) & 0xFF)) {
_lastresult = true;
return _lastresult;
}
else {
DEBUG_PRINTLN(F("Checksum failure!"));
_lastresult = false;
return _lastresult;
}
}
// Expect the signal line to be at the specified level for a period of time and
// return a count of loop cycles spent at that level (this cycle count can be
// used to compare the relative time of two pulses). If more than a millisecond
// ellapses without the level changing then the call fails with a 0 response.
// This is adapted from Arduino's pulseInLong function (which is only available
// in the very latest IDE versions):
// https://github.com/arduino/Arduino/blob/master/hardware/arduino/avr/cores/arduino/wiring_pulse.c
uint32_t DHT::expectPulse(bool level) {
uint32_t count = 0;
// On AVR platforms use direct GPIO port access as it's much faster and better
// for catching pulses that are 10's of microseconds in length:
#ifdef __AVR
uint8_t portState = level ? _bit : 0;
while ((*portInputRegister(_port) & _bit) == portState) {
if (count++ >= _maxcycles) {
return 0; // Exceeded timeout, fail.
}
}
// Otherwise fall back to using digitalRead (this seems to be necessary on ESP8266
// right now, perhaps bugs in direct port access functions?).
#else
while (digitalRead(_pin) == level) {
if (count++ >= _maxcycles) {
return 0; // Exceeded timeout, fail.
}
}
#endif
return count;
}

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examples/osd/arduino-trockenautomat/DHT.h Normal file
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/* DHT library
MIT license
written by Adafruit Industries
*/
#ifndef DHT_H
#define DHT_H
#include "Arduino.h"
// Uncomment to enable printing out nice debug messages.
//#define DHT_DEBUG
// Define where debug output will be printed.
#define DEBUG_PRINTER Serial
// Setup debug printing macros.
#ifdef DHT_DEBUG
#define DEBUG_PRINT(...) { DEBUG_PRINTER.print(__VA_ARGS__); }
#define DEBUG_PRINTLN(...) { DEBUG_PRINTER.println(__VA_ARGS__); }
#else
#define DEBUG_PRINT(...) {}
#define DEBUG_PRINTLN(...) {}
#endif
// Define types of sensors.
#define DHT11 11
#define DHT22 22
#define DHT21 21
#define AM2301 21
class DHT {
public:
DHT(uint8_t pin, uint8_t type, uint8_t count=6);
void begin(void);
float readTemperature(bool S=false, bool force=false);
float convertCtoF(float);
float convertFtoC(float);
float computeHeatIndex(float temperature, float percentHumidity, bool isFahrenheit=true);
float readHumidity(bool force=false);
boolean read(bool force=false);
private:
uint8_t data[5];
uint8_t _pin, _type;
#ifdef __AVR
// Use direct GPIO access on an 8-bit AVR so keep track of the port and bitmask
// for the digital pin connected to the DHT. Other platforms will use digitalRead.
uint8_t _bit, _port;
#endif
uint32_t _lastreadtime, _maxcycles;
bool _lastresult;
uint32_t expectPulse(bool level);
};
class InterruptLock {
public:
InterruptLock() {
noInterrupts();
}
~InterruptLock() {
interrupts();
}
};
#endif

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examples/osd/arduino-trockenautomat/Makefile Normal file
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# Set this to the name of your sketch (without extension .pde)
SKETCH=sketch
EXE=arduino-example
all: $(EXE)
CONTIKI=../../..
# Contiki IPv6 configuration
CONTIKI_WITH_IPV6 = 1
CFLAGS += -DPROJECT_CONF_H=\"project-conf.h\"
LFLAGS += -lm
PROJECT_SOURCEFILES += ${SKETCH}.cpp DHT.cpp
# automatically build RESTful resources
REST_RESOURCES_DIR = ./resources
REST_RESOURCES_DIR_COMMON = ../resources-common
REST_RESOURCES_FILES= $(notdir \
$(shell find $(REST_RESOURCES_DIR) -name '*.c') \
$(shell find $(REST_RESOURCES_DIR_COMMON) -name '*.c') \
)
PROJECTDIRS += $(REST_RESOURCES_DIR) $(REST_RESOURCES_DIR_COMMON)
PROJECT_SOURCEFILES += $(REST_RESOURCES_FILES)
# variable for Makefile.include
ifneq ($(TARGET), minimal-net)
CFLAGS += -DUIP_CONF_IPV6_RPL=1
else
# minimal-net does not support RPL under Linux and is mostly used to test CoAP only
${info INFO: compiling without RPL}
CFLAGS += -DUIP_CONF_IPV6_RPL=0
CFLAGS += -DHARD_CODED_ADDRESS=\"fdfd::10\"
${info INFO: compiling with large buffers}
CFLAGS += -DUIP_CONF_BUFFER_SIZE=2048
CFLAGS += -DREST_MAX_CHUNK_SIZE=1024
CFLAGS += -DCOAP_MAX_HEADER_SIZE=640
endif
# linker optimizations
SMALL=1
# REST Engine shall use Erbium CoAP implementation
APPS += er-coap
APPS += rest-engine
APPS += arduino
include $(CONTIKI)/Makefile.include
include $(CONTIKI)/apps/arduino/Makefile.include
$(CONTIKI)/tools/tunslip6: $(CONTIKI)/tools/tunslip6.c
(cd $(CONTIKI)/tools && $(MAKE) tunslip6)
connect-router: $(CONTIKI)/tools/tunslip6
sudo $(CONTIKI)/tools/tunslip6 aaaa::1/64
connect-router-cooja: $(CONTIKI)/tools/tunslip6
sudo $(CONTIKI)/tools/tunslip6 -a 127.0.0.1 aaaa::1/64
connect-minimal:
sudo ip address add fdfd::1/64 dev tap0

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Arduino compatibility example
=============================
This example shows that it is now possible to re-use arduino sketches in
Contiki. This example documents the necessary magic. Arduino specifies
two routines, `setup` and `loop`. Before `setup` is called, the
framework initializes hardware. In original Arduino, all this is done in
a `main` function (in C). For contiki we define a process that does the
same.
See the documentation file in apps/contiki-compat/README.md

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examples/osd/arduino-trockenautomat/arduino-example.c Normal file
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#include <arduino-process.h>
AUTOSTART_PROCESSES(&arduino_sketch);

53
examples/osd/arduino-trockenautomat/arduino-trockenautomat.geany Normal file
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[file_prefs]
final_new_line=true
ensure_convert_new_lines=false
strip_trailing_spaces=false
replace_tabs=false
[indentation]
indent_width=4
indent_type=1
indent_hard_tab_width=8
detect_indent=false
detect_indent_width=false
indent_mode=2
[project]
name=arduino-trockenautomat
base_path=/home/harald/install/osd-contiki/examples/osd/arduino-trockenautomat/
description=
file_patterns=
[long line marker]
long_line_behaviour=1
long_line_column=72
[files]
current_page=0
FILE_NAME_0=792;C++;0;EUTF-8;1;1;0;%2Fhome%2Fharald%2Finstall%2Fosd-contiki%2Fexamples%2Fosd%2Farduino-dht%2Fsketch.pde;0;4
[VTE]
last_dir=/home/harald
[build-menu]
NF_00_LB=_Make
NF_00_CM=make TARGET=osd-merkur-256
NF_00_WD=
NF_01_LB=Make flash
NF_01_CM=make TARGET=osd-merkur-256 flash
NF_01_WD=
NF_03_LB=Make Clean
NF_03_CM=make clean TARGET=osd-merkur-256
NF_03_WD=
C++FT_00_LB=_Kompilieren
C++FT_00_CM=make TARGET=osd-merkur-256
C++FT_00_WD=
C++FT_01_LB=_Erstellen
C++FT_01_CM=make TARGET=osd-merkur-256 flash
C++FT_01_WD=
filetypes=C++;
[editor]
line_wrapping=false
line_break_column=72
auto_continue_multiline=true

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examples/osd/arduino-trockenautomat/flash.sh Executable file
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#!/bin/bash
make TARGET=osd-merkur-128 flash

106
examples/osd/arduino-trockenautomat/project-conf.h Normal file
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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
*/
#ifndef PROJECT_RPL_WEB_CONF_H_
#define PROJECT_RPL_WEB_CONF_H_
#define PLATFORM_HAS_LEDS 1
//#define PLATFORM_HAS_BUTTON 1
#define PLATFORM_HAS_BATTERY 1
#define SICSLOWPAN_CONF_FRAG 1
#define LOOP_INTERVAL (10 * CLOCK_SECOND)
/* Save energy */
//#define RDC_CONF_PT_YIELD_OFF
/* For Debug: Dont allow MCU sleeping between channel checks */
//#undef RDC_CONF_MCU_SLEEP
//#define RDC_CONF_MCU_SLEEP 0
/* Disabling RDC for demo purposes. Core updates often require more memory. */
/* For projects, optimize memory and enable RDC again. */
// #undef NETSTACK_CONF_RDC
//#define NETSTACK_CONF_RDC nullrdc_driver
/* Increase rpl-border-router IP-buffer when using more than 64. */
#undef REST_MAX_CHUNK_SIZE
#define REST_MAX_CHUNK_SIZE 64
/* Estimate your header size, especially when using Proxy-Uri. */
/*
#undef COAP_MAX_HEADER_SIZE
#define COAP_MAX_HEADER_SIZE 70
*/
/* The IP buffer size must fit all other hops, in particular the border router. */
#undef UIP_CONF_BUFFER_SIZE
#define UIP_CONF_BUFFER_SIZE 256
/* Multiplies with chunk size, be aware of memory constraints. */
#undef COAP_MAX_OPEN_TRANSACTIONS
#define COAP_MAX_OPEN_TRANSACTIONS 4
/* Must be <= open transaction number, default is COAP_MAX_OPEN_TRANSACTIONS-1. */
/*
#undef COAP_MAX_OBSERVERS
#define COAP_MAX_OBSERVERS 2
*/
/* Filtering .well-known/core per query can be disabled to save space. */
/*
#undef COAP_LINK_FORMAT_FILTERING
#define COAP_LINK_FORMAT_FILTERING 0
*/
/* Save some memory for the sky platform. */
/*
#undef NBR_TABLE_CONF_MAX_NEIGHBORS
#define NBR_TABLE_CONF_MAX_NEIGHBORS 10
#undef UIP_CONF_MAX_ROUTES
#define UIP_CONF_MAX_ROUTES 10
*/
/* Reduce 802.15.4 frame queue to save RAM. */
/*
#undef QUEUEBUF_CONF_NUM
#define QUEUEBUF_CONF_NUM 4
*/
/*
#undef SICSLOWPAN_CONF_FRAG
#define SICSLOWPAN_CONF_FRAG 1
*/
#endif /* PROJECT_RPL_WEB_CONF_H_ */

80
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/*
* Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*/
/**
* \file
* Moisture resource
* \author
* Harald Pichler <harald@the-develop.net>
*/
#include "contiki.h"
#include <string.h>
#include "rest-engine.h"
#include "Arduino.h"
static void res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
/* A simple getter example. Returns the reading from the sensor with a simple etag */
RESOURCE(res_dhtahum,
"title=\"Moisture status\";rt=\"Moisture\"",
res_get_handler,
NULL,
NULL,
NULL);
extern char dhta_hum_s[8];
static void
res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
unsigned int accept = -1;
REST.get_header_accept(request, &accept);
if(accept == -1 || accept == REST.type.TEXT_PLAIN) {
REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "%s", dhta_hum_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else if(accept == REST.type.APPLICATION_JSON) {
REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "{'moisture':%s}", dhta_hum_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else {
REST.set_response_status(response, REST.status.NOT_ACCEPTABLE);
const char *msg = "Supporting content-types text/plain and application/json";
REST.set_response_payload(response, msg, strlen(msg));
}
}

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/*
* Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*/
/**
* \file
* Moisture resource
* \author
* Harald Pichler <harald@the-develop.net>
*/
#include "contiki.h"
#include <string.h>
#include "rest-engine.h"
#include "Arduino.h"
static void res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
/* A simple getter example. Returns the reading from the sensor with a simple etag */
RESOURCE(res_dhtatemp,
"title=\"Temperature status\";rt=\"Temperatur\"",
res_get_handler,
NULL,
NULL,
NULL);
extern char dhta_temp_s[8];
static void
res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
unsigned int accept = -1;
REST.get_header_accept(request, &accept);
if(accept == -1 || accept == REST.type.TEXT_PLAIN) {
REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "%s", dhta_temp_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else if(accept == REST.type.APPLICATION_JSON) {
REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "{'temperature':%s}", dhta_temp_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else {
REST.set_response_status(response, REST.status.NOT_ACCEPTABLE);
const char *msg = "Supporting content-types text/plain and application/json";
REST.set_response_payload(response, msg, strlen(msg));
}
}

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/*
* Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*/
/**
* \file
* Moisture resource
* \author
* Harald Pichler <harald@the-develop.net>
*/
#include "contiki.h"
#include <string.h>
#include "rest-engine.h"
#include "Arduino.h"
static void res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
/* A simple getter example. Returns the reading from the sensor with a simple etag */
RESOURCE(res_dhtbhum,
"title=\"Moisture status\";rt=\"Moisture\"",
res_get_handler,
NULL,
NULL,
NULL);
extern char dhtb_hum_s[8];
static void
res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
unsigned int accept = -1;
REST.get_header_accept(request, &accept);
if(accept == -1 || accept == REST.type.TEXT_PLAIN) {
REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "%s", dhtb_hum_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else if(accept == REST.type.APPLICATION_JSON) {
REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "{'moisture':%s}", dhtb_hum_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else {
REST.set_response_status(response, REST.status.NOT_ACCEPTABLE);
const char *msg = "Supporting content-types text/plain and application/json";
REST.set_response_payload(response, msg, strlen(msg));
}
}

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/*
* Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*/
/**
* \file
* Moisture resource
* \author
* Harald Pichler <harald@the-develop.net>
*/
#include "contiki.h"
#include <string.h>
#include "rest-engine.h"
#include "Arduino.h"
static void res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
/* A simple getter example. Returns the reading from the sensor with a simple etag */
RESOURCE(res_dhtbtemp,
"title=\"Temperature status\";rt=\"Temperatur\"",
res_get_handler,
NULL,
NULL,
NULL);
extern char dhtb_temp_s[8];
static void
res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
unsigned int accept = -1;
REST.get_header_accept(request, &accept);
if(accept == -1 || accept == REST.type.TEXT_PLAIN) {
REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "%s", dhtb_temp_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else if(accept == REST.type.APPLICATION_JSON) {
REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "{'temperature':%s}", dhtb_temp_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else {
REST.set_response_status(response, REST.status.NOT_ACCEPTABLE);
const char *msg = "Supporting content-types text/plain and application/json";
REST.set_response_payload(response, msg, strlen(msg));
}
}

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/*
* Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*/
/**
* \file
* Moisture resource
* \author
* Harald Pichler <harald@the-develop.net>
*/
#include "contiki.h"
#include <string.h>
#include "rest-engine.h"
#include "Arduino.h"
static void res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
/* A simple getter example. Returns the reading from the sensor with a simple etag */
RESOURCE(res_dhtchum,
"title=\"Moisture status\";rt=\"Moisture\"",
res_get_handler,
NULL,
NULL,
NULL);
extern char dhtc_hum_s[8];
static void
res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
unsigned int accept = -1;
REST.get_header_accept(request, &accept);
if(accept == -1 || accept == REST.type.TEXT_PLAIN) {
REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "%s", dhtc_hum_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else if(accept == REST.type.APPLICATION_JSON) {
REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "{'moisture':%s}", dhtc_hum_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else {
REST.set_response_status(response, REST.status.NOT_ACCEPTABLE);
const char *msg = "Supporting content-types text/plain and application/json";
REST.set_response_payload(response, msg, strlen(msg));
}
}

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/*
* Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*/
/**
* \file
* Moisture resource
* \author
* Harald Pichler <harald@the-develop.net>
*/
#include "contiki.h"
#include <string.h>
#include "rest-engine.h"
#include "Arduino.h"
static void res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
/* A simple getter example. Returns the reading from the sensor with a simple etag */
RESOURCE(res_dhtctemp,
"title=\"Temperature status\";rt=\"Temperatur\"",
res_get_handler,
NULL,
NULL,
NULL);
extern char dhtc_temp_s[8];
static void
res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
unsigned int accept = -1;
REST.get_header_accept(request, &accept);
if(accept == -1 || accept == REST.type.TEXT_PLAIN) {
REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "%s", dhtc_temp_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else if(accept == REST.type.APPLICATION_JSON) {
REST.set_header_content_type(response, REST.type.APPLICATION_JSON);
snprintf((char *)buffer, REST_MAX_CHUNK_SIZE, "{'temperature':%s}", dhtc_temp_s);
REST.set_response_payload(response, buffer, strlen((char *)buffer));
} else {
REST.set_response_status(response, REST.status.NOT_ACCEPTABLE);
const char *msg = "Supporting content-types text/plain and application/json";
REST.set_response_payload(response, msg, strlen(msg));
}
}

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#!/bin/bash
# For the ages-old bootloader (before 2014) you want to use
# BOOTLOADER_GET_MAC=0x0001f3a0 as parameter to make below.
make clean TARGET=osd-merkur-128
make TARGET=osd-merkur-128

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/*
* Sample arduino sketch using contiki features.
* We turn the LED off
* We allow read the moisture sensor
* Unfortunately sleeping for long times in loop() isn't currently
* possible, something turns off the CPU (including PWM outputs) if a
* Proto-Thread is taking too long. We need to find out how to sleep in
* a Contiki-compatible way.
* Note that for a normal arduino sketch you won't have to include any
* of the contiki-specific files here, the sketch should just work.
*/
#include <Wire.h>
#include "DHT.h"
extern "C" {
#include "arduino-process.h"
#include "rest-engine.h"
#include "net/netstack.h"
extern resource_t res_dhtatemp, res_dhtahum, res_battery;
extern resource_t res_dhtbtemp, res_dhtbhum;
extern resource_t res_dhtctemp, res_dhtchum;
#define LED_PIN 4
// Uncomment whatever type you're using!
//#define DHTTYPE DHT11 // DHT 11
#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
// Connect pin 1 (on the left) of the sensor to +3.3V
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) o
#define DHTPINA 7 // what digital pin we're connected to
DHT dhta(DHTPINA, DHTTYPE);
#define DHTPINB 8 // what digital pin we're connected to
DHT dhtb(DHTPINB, DHTTYPE);
#define DHTPINC 9 // what digital pin we're connected to
DHT dhtc(DHTPINC, DHTTYPE);
float dhta_hum;
float dhta_temp;
char dhta_hum_s[8];
char dhta_temp_s[8];
float dhtb_hum;
float dhtb_temp;
char dhtb_hum_s[8];
char dhtb_temp_s[8];
float dhtc_hum;
float dhtc_temp;
char dhtc_hum_s[8];
char dhtc_temp_s[8];
}
void setup (void)
{
// NETSTACK_MAC.off(1); // reciever always on
printf("DHT Sensor\n");
// switch off the led
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, HIGH);
// DHT sensor
dhta.begin();
dhtb.begin();
dhtc.begin();
// init coap resourcen
rest_init_engine ();
#pragma GCC diagnostic ignored "-Wwrite-strings"
rest_activate_resource (&res_dhtatemp, "s/tempa");
rest_activate_resource (&res_dhtahum, "s/huma");
rest_activate_resource (&res_dhtbtemp, "s/tempb");
rest_activate_resource (&res_dhtbhum, "s/humb");
rest_activate_resource (&res_dhtctemp, "s/tempc");
rest_activate_resource (&res_dhtchum, "s/humc");
rest_activate_resource (&res_battery, "s/battery");
#pragma GCC diagnostic pop
mcu_sleep_set(128); // Power consumtion 278uA; average over 20 minutes
}
// at project-conf.h
// LOOP_INTERVAL (30 * CLOCK_SECOND)
void loop (void)
{
int errdht=0;
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
dhta_hum = dhta.readHumidity();
dhtb_hum = dhtb.readHumidity();
dhtc_hum = dhtc.readHumidity();
// Read temperature as Celsius (the default)
dhta_temp = dhta.readTemperature();
dhtb_temp = dhtb.readTemperature();
dhtc_temp = dhtc.readTemperature();
// Check if any reads failed and exit early (to try again).
if (isnan(dhta_hum) || isnan(dhta_temp)) {
printf("Failed to read from DHTa sensor!\n");
errdht=1;
}
if (isnan(dhtb_hum) || isnan(dhtb_temp)) {
printf("Failed to read from DHTb sensor!\n");
errdht=1;
}
if (isnan(dhtc_hum) || isnan(dhtc_temp)) {
printf("Failed to read from DHTc sensor!\n");
errdht=1;
}
if (errdht){
return;
}
dtostrf(dhta_temp , 0, 2, dhta_temp_s );
dtostrf(dhta_hum , 0, 2, dhta_hum_s );
dtostrf(dhtb_temp , 0, 2, dhtb_temp_s );
dtostrf(dhtb_hum , 0, 2, dhtb_hum_s );
dtostrf(dhtc_temp , 0, 2, dhtc_temp_s );
dtostrf(dhtc_hum , 0, 2, dhtc_hum_s );
// debug only
printf("Tempa: '%s'",dhta_temp_s);
printf("\t\tHuma: '%s'\n",dhta_hum_s);
printf("Tempb: '%s'",dhtb_temp_s);
printf("\t\tHumb: '%s'\n",dhtb_hum_s);
printf("Tempc: '%s'",dhtc_temp_s);
printf("\t\tHumc: '%s'\n",dhtc_hum_s);
}