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/Signal.cpp@139:f8ab852e83e7, 2016-08-08 (annotated)

Committer:
xinlei
Date:
Mon Aug 08 11:05:57 2016 +0000
Revision:
139:f8ab852e83e7
Parent:
137:a52821cdb108 
Etisalat and Teleena APN.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
xinlei 101:dbcd3bc51758 1 #include <stdio.h>
xinlei 101:dbcd3bc51758 2 #include "Signal.h"
xinlei 101:dbcd3bc51758 3 #include "SmartRestConf.h"
xinlei 101:dbcd3bc51758 4 #include "LCDDisplay.h"
xinlei 101:dbcd3bc51758 5 #include "DeviceInfo.h"
xinlei 101:dbcd3bc51758 6 #include "logging.h"
xinlei 101:dbcd3bc51758 7
xinlei 101:dbcd3bc51758 8 // Cut-off for avoiding sending similar sensor reading.
xinlei 101:dbcd3bc51758 9 #define THRESHOLD_PERCENT_SIG 0.06
xinlei 101:dbcd3bc51758 10 // Timeout for forcing a sending even if readings are similar [seconds].
xinlei 101:dbcd3bc51758 11 #define TIME_LIMIT_SIG 900
xinlei 101:dbcd3bc51758 12
xinlei 124:311fa85af2b3 13 static inline bool valueChanged(int *V0, int *V1)
xinlei 124:311fa85af2b3 14 {
xinlei 124:311fa85af2b3 15 if (abs(V0[0]-V1[0]) <= abs(V0[0])*THRESHOLD_PERCENT_SIG &&
xinlei 124:311fa85af2b3 16 abs(V0[1]-V1[1]) <= abs(V0[1])*THRESHOLD_PERCENT_SIG)
xinlei 124:311fa85af2b3 17 return false;
xinlei 124:311fa85af2b3 18 else
xinlei 124:311fa85af2b3 19 return true;
xinlei 124:311fa85af2b3 20 }
xinlei 101:dbcd3bc51758 21
xinlei 137:a52821cdb108 22 int Signal::read(char *buf, size_t maxLen, char *status, size_t num)
xinlei 101:dbcd3bc51758 23 {
xinlei 101:dbcd3bc51758 24 static const char *fmt = "104,%ld,%d,%d\r\n";
xinlei 101:dbcd3bc51758 25 static char signal[27] = {0};
xinlei 101:dbcd3bc51758 26 DeviceInfo::SignalQuality *p = deviceInfo.signalQuality();
xinlei 123:3e4a1ed4bad5 27
xinlei 123:3e4a1ed4bad5 28 if (p && p->rssi)
xinlei 101:dbcd3bc51758 29 snprintf(signal, sizeof(signal), "Network: %d dBm", p->rssi);
xinlei 101:dbcd3bc51758 30 else
xinlei 101:dbcd3bc51758 31 strncpy(signal, "Network: no coverage", sizeof(signal));
xinlei 101:dbcd3bc51758 32 if (strcmp(LCDDisplay::inst().getSecondLine(), signal)) {
xinlei 101:dbcd3bc51758 33 LCDDisplay::inst().setSecondLine(signal);
xinlei 101:dbcd3bc51758 34 }
xinlei 137:a52821cdb108 35 if (p == NULL || p->rssi == 0)
xinlei 137:a52821cdb108 36 return -1;
xinlei 101:dbcd3bc51758 37
xinlei 101:dbcd3bc51758 38 int data[2] = { p->rssi, p->ber };
xinlei 124:311fa85af2b3 39 float t_interval = timer.read();
xinlei 124:311fa85af2b3 40 if (!valueChanged(oldValues, data) && t_interval < TIME_LIMIT_SIG) {
xinlei 124:311fa85af2b3 41 return 0;
xinlei 101:dbcd3bc51758 42 }
xinlei 101:dbcd3bc51758 43
xinlei 101:dbcd3bc51758 44 size_t l = snprintf(buf, maxLen, fmt, deviceID, data[0], data[1]);
xinlei 101:dbcd3bc51758 45 if (status) {
xinlei 101:dbcd3bc51758 46 snprintf(status, num, "Send dBm %d,%d", data[0], data[1]);
xinlei 101:dbcd3bc51758 47 }
xinlei 101:dbcd3bc51758 48 oldValues[0] = data[0];
xinlei 101:dbcd3bc51758 49 oldValues[1] = data[1];
xinlei 124:311fa85af2b3 50 timer.reset();
xinlei 101:dbcd3bc51758 51 return l;
xinlei 101:dbcd3bc51758 52 }