72 lines
1.9 KiB
Text
72 lines
1.9 KiB
Text
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/*
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* Sample arduino sketch using contiki features.
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* We turn the LED off
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* We allow read the moisture sensor
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* Unfortunately sleeping for long times in loop() isn't currently
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* possible, something turns off the CPU (including PWM outputs) if a
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* Proto-Thread is taking too long. We need to find out how to sleep in
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* a Contiki-compatible way.
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* Note that for a normal arduino sketch you won't have to include any
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* of the contiki-specific files here, the sketch should just work.
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*/
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#include <Wire.h>
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#include "Adafruit_HTU21DF.h"
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extern "C" {
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#include "rest-engine.h"
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extern volatile uint8_t mcusleepcycle; // default 16
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Adafruit_HTU21DF htu = Adafruit_HTU21DF();
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extern resource_t res_htu21dtemp, res_htu21dhum, res_battery;
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float htu21d_hum;
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float htu21d_temp;
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char htu21d_hum_s[8];
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char htu21d_temp_s[8];
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#define LED_PIN 4
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}
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void setup (void)
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{
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// switch off the led
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pinMode(LED_PIN, OUTPUT);
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digitalWrite(LED_PIN, HIGH);
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// htu21d sensor
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if (!htu.begin()) {
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printf("Couldn't find sensor!");
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}
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// init coap resourcen
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rest_init_engine ();
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rest_activate_resource (&res_htu21dtemp, "s/temp");
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rest_activate_resource (&res_htu21dhum, "s/hum");
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rest_activate_resource (&res_battery, "s/battery");
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}
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// at project-conf.h
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// LOOP_INTERVAL (10 * CLOCK_SECOND)
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void loop (void)
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{
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mcusleepcycle=0; // dont sleep
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htu21d_temp = htu.readTemperature();
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htu21d_hum = htu.readHumidity();
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mcusleepcycle=32; // sleep, wakeup every 32 cycles
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dtostrf(htu21d_temp , 6, 2, htu21d_temp_s );
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dtostrf(htu21d_hum , 6, 2, htu21d_hum_s );
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// remove space
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if(htu21d_temp_s[0]==' '){
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memcpy (htu21d_temp_s,htu21d_temp_s+1,strlen(htu21d_temp_s)+1);
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}
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if(htu21d_hum_s[0]==' '){
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memcpy (htu21d_hum_s,htu21d_hum_s+1,strlen(htu21d_hum_s)+1);
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}
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// debug only
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// printf("Temp: %s",htu21d_temp_s);
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// printf("\t\tHum: %s\n",htu21d_hum_s);
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}
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