Cumulocity Official / Mbed 2 deprecated MbedSmartRestMain Featured

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 Vincent Wochnik

measurement/TemperatureMeasurement.cpp@71:063c45e99578, 2015-02-16 (annotated)

Committer:
xinlei
Date:
Mon Feb 16 09:17:30 2015 +0000
Revision:
71:063c45e99578
Parent:
56:4d6e34f1589d
Child:
72:c5709ae7b193
Various minor bug fixes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Cumulocity 41:804f6a0bda26 1 #include "TemperatureMeasurement.h"
Cumulocity 41:804f6a0bda26 2 #include "ComposedRecord.h"
Cumulocity 41:804f6a0bda26 3 #include "CharValue.h"
Cumulocity 41:804f6a0bda26 4 #include "IntegerValue.h"
Cumulocity 41:804f6a0bda26 5 #include "FloatValue.h"
Cumulocity 41:804f6a0bda26 6
xinlei 71:063c45e99578 7 #define THRESHOLD_PERCENT_TEMP 0.05 // Percentage cut-off for avoiding sending similar temperature sensor data.
xinlei 71:063c45e99578 8 #define TIME_LIMIT_TEMP 900 // Time interval for forcing a sending even if analog sensor readings are constantly similar.
xinlei 71:063c45e99578 9
vwochnik 55:a0f7295ed6b6 10 TemperatureMeasurement::TemperatureMeasurement(AbstractSmartRest& client, SmartRestTemplate& tpl, long& deviceId, LM75B& sensor) :
Cumulocity 41:804f6a0bda26 11 _client(client),
Cumulocity 41:804f6a0bda26 12 _tpl(tpl),
Cumulocity 41:804f6a0bda26 13 _deviceId(deviceId),
xinlei 71:063c45e99578 14 _sensor(sensor),
xinlei 71:063c45e99578 15 oldValue(0)
Cumulocity 41:804f6a0bda26 16 {
Cumulocity 41:804f6a0bda26 17 _init = false;
xinlei 71:063c45e99578 18 sendingTimer.start();
Cumulocity 41:804f6a0bda26 19 }
Cumulocity 41:804f6a0bda26 20
Cumulocity 41:804f6a0bda26 21 bool TemperatureMeasurement::init()
Cumulocity 41:804f6a0bda26 22 {
Cumulocity 41:804f6a0bda26 23 if (_init)
Cumulocity 41:804f6a0bda26 24 return false;
Cumulocity 41:804f6a0bda26 25
Cumulocity 41:804f6a0bda26 26 // Insert measurement
Cumulocity 41:804f6a0bda26 27 // USAGE: 105,<DEVICE/ID>,<TEMPERATURE>
Cumulocity 41:804f6a0bda26 28 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"))
Cumulocity 41:804f6a0bda26 29 return false;
Cumulocity 41:804f6a0bda26 30
Cumulocity 41:804f6a0bda26 31 _open = _sensor.open();
Cumulocity 41:804f6a0bda26 32 _init = true;
Cumulocity 41:804f6a0bda26 33 return true;
Cumulocity 41:804f6a0bda26 34 }
Cumulocity 41:804f6a0bda26 35
Cumulocity 41:804f6a0bda26 36 bool TemperatureMeasurement::run()
Cumulocity 41:804f6a0bda26 37 {
Cumulocity 41:804f6a0bda26 38 if (!_open)
Cumulocity 41:804f6a0bda26 39 return false;
Cumulocity 41:804f6a0bda26 40
xinlei 71:063c45e99578 41 float data = 0;
xinlei 71:063c45e99578 42 data = _sensor.temp();
xinlei 71:063c45e99578 43 if (abs(oldValue-data) <= abs(oldValue)*THRESHOLD_PERCENT_TEMP) {
xinlei 71:063c45e99578 44 if (sendingTimer.read() < TIME_LIMIT_TEMP) {
xinlei 71:063c45e99578 45 printf("Similar temperature readings found, no sending!\r\n");
xinlei 71:063c45e99578 46 return true;
xinlei 71:063c45e99578 47 } else {
xinlei 71:063c45e99578 48 printf("Sending timer of temperature sensor timed out at %f s, a sending is forced.\r\n", sendingTimer.read());
xinlei 71:063c45e99578 49 }
xinlei 71:063c45e99578 50 }
xinlei 71:063c45e99578 51
Cumulocity 41:804f6a0bda26 52 ComposedRecord record;
Cumulocity 41:804f6a0bda26 53 IntegerValue msgId(105);
Cumulocity 41:804f6a0bda26 54 IntegerValue devId(_deviceId);
xinlei 71:063c45e99578 55 FloatValue temperature(data, 1);
Cumulocity 41:804f6a0bda26 56 if ((!record.add(msgId)) || (!record.add(devId)) || (!record.add(temperature)))
Cumulocity 41:804f6a0bda26 57 return false;
Cumulocity 41:804f6a0bda26 58
Cumulocity 41:804f6a0bda26 59 if (_client.send(record) != SMARTREST_SUCCESS) {
Cumulocity 41:804f6a0bda26 60 puts("Signal measurement failed.");
Cumulocity 41:804f6a0bda26 61 _client.stop();
Cumulocity 41:804f6a0bda26 62 return false;
Cumulocity 41:804f6a0bda26 63 }
Cumulocity 41:804f6a0bda26 64 _client.stop();
xinlei 71:063c45e99578 65 oldValue = data;
xinlei 71:063c45e99578 66 sendingTimer.reset();
xinlei 71:063c45e99578 67 printf("Temperature readings sent.\r\n");
Cumulocity 41:804f6a0bda26 68 return true;
Cumulocity 41:804f6a0bda26 69 }