Official reference client implementation for Cumulocity SmartREST on u-blox C027.
Dependencies: C027_Support C12832 LM75B MMA7660 MbedSmartRest mbed-rtos mbed
Fork of MbedSmartRestMain by
measurement/TemperatureMeasurement.cpp
- Committer:
- xinlei
- Date:
- 2015-02-16
- Revision:
- 72:c5709ae7b193
- Parent:
- 71:063c45e99578
- Child:
- 73:313975bfec96
File content as of revision 72:c5709ae7b193:
#include "TemperatureMeasurement.h" #include "ComposedRecord.h" #include "CharValue.h" #include "IntegerValue.h" #include "FloatValue.h" #include "logging.h" #define THRESHOLD_PERCENT_TEMP 0.05 // Percentage cut-off for avoiding sending similar temperature sensor data. #define TIME_LIMIT_TEMP 900 // Time interval for forcing a sending even if analog sensor readings are constantly similar. TemperatureMeasurement::TemperatureMeasurement(AbstractSmartRest& client, SmartRestTemplate& tpl, long& deviceId, LM75B& sensor) : _client(client), _tpl(tpl), _deviceId(deviceId), _sensor(sensor), oldValue(0) { _init = false; sendingTimer.start(); } bool TemperatureMeasurement::init() { if (_init) return false; // Insert measurement // USAGE: 105,<DEVICE/ID>,<TEMPERATURE> if (!_tpl.add("10,105,POST,/measurement/measurements,application/vnd.com.nsn.cumulocity.measurement+json,application/vnd.com.nsn.cumulocity.measurement+json,%%,NOW UNSIGNED NUMBER,\"{\"\"time\"\":\"\"%%\"\",\"\"source\"\":{\"\"id\"\":\"\"%%\"\"},\"\"type\"\":\"\"c8y_TemperatureMeasurement\"\",\"\"c8y_TemperatureMeasurement\"\":{\"\"T\"\":{\"\"value\"\":%%,\"\"unit\"\":\"\"C\"\"}}}\"\r\n")) return false; _open = _sensor.open(); _init = true; return true; } bool TemperatureMeasurement::run() { if (!_open) return false; float data = 0; data = _sensor.temp(); if (abs(oldValue-data) <= abs(oldValue)*THRESHOLD_PERCENT_TEMP) { if (sendingTimer.read() < TIME_LIMIT_TEMP) { aInfo("Similar temperature readings found, no sending!\r\n"); return true; } else { aInfo("Sending timer of temperature sensor timed out at %f s, a sending is forced.\r\n", sendingTimer.read()); } } ComposedRecord record; IntegerValue msgId(105); IntegerValue devId(_deviceId); FloatValue temperature(data, 1); if ((!record.add(msgId)) || (!record.add(devId)) || (!record.add(temperature))) return false; if (_client.send(record) != SMARTREST_SUCCESS) { aError("Signal measurement failed.\r\n"); _client.stop(); return false; } _client.stop(); oldValue = data; sendingTimer.reset(); aInfo("Temperature readings sent.\r\n"); return true; }