68 lines
2.2 KiB
Markdown
68 lines
2.2 KiB
Markdown
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Example: mockup of DC converter functionality for IoT-grid.
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===========================================
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This example imitates DC converter functionality for IoT-grid.
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We use standard IoT protocol stack with CoAP application-level protocol.
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The settings are as follows.
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* APPLICATION: CoAP
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* TRANSPORT: UDP
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* NETWORK: IPv6/RPL
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* ADAPTATION: 6LoWPAN
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* MAC: nullmac_driver
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* RADIO DUTY CYCLE: nullrdc_driver
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* PHYSICAL: IEEE 802.15.4
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CoAP resources
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----------------
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We define a CoAP resource for each functionality of DC converter.
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Since each functionality may have several parameters, we define each resource
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as a vector of parameters as follows.
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* /dcdc/status read-only parameters for power monitoring.
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It also support periodic monitoring through CoAP observe option.
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** 0 VOUT Output voltage
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** 1 VIN Input voltage
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** 2 IOUT Output current
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** 3 IIN Input current
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* /dcdc/vdc configurable parameters for voltage droop control function.
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** 0 VGRID Desired grid output voltage
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** 1 SLOPE Slope of voltage droop control function
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** 2 PMAX Maximum output power allowed
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* /dcdc/hwcfg configurable parameters for DC converter hardware.
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** 0 VMAX Maximum output voltage allowed
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** 1 IMAX Maximum output current allowed
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Each functionality is implemented as a sensor type device.
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They are located in "dev" folder.
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* dc-status-sensor for /dcdc/status
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* dc-vdc-sensor for /dcdc/vdc
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* dc-hw-sensor for /dcdc/hwcfg
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The corresponding CoAP handler for each resource is defined in "resources" folder.
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* res-dc-status-obs for /dcdc/status
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* res-dc-vdc for /dcdc/vdc
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* res-dc-hwcfg for /dcdc/hwcfg
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coap-server.c
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----------------
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The server acts as the RPL root node.
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It has 3 CoAP resources as described above.
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coap-client.c
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----------------
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The client periodically send a CoAP command (either GET or PUT) to monitor/update
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values of parameters of a resource.
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project-conf.h
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----------------
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This file contains definitions needed for this IoT-grid example as follows.
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* Enable IPv6 network stack
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* Set nullrdc_driver
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* Set nullmac_driver
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* Activate CoAP observe client library (COAP_OBSERVE_CLIENT = 1)
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* Increase the maximum number of observee and maximum number of open transaction to 10
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(COAP_MAX_OPEN_TRANSACTIONS and COAP_MAX_OBSERVEES = 10)
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