Own fork of MbedSmartRestMain
Dependencies: C027_Support C12832 LM75B MMA7660 MbedSmartRest mbed-rtos mbed
Fork of MbedSmartRestMain by
measurement/Location.cpp
- Committer:
- xinlei
- Date:
- 2015-05-20
- Revision:
- 117:e831cdb799ab
- Parent:
- 100:dbcd3bc51758
- Child:
- 123:311fa85af2b3
File content as of revision 117:e831cdb799ab:
#include <stdio.h> #include "Location.h" #include "SmartRestConf.h" #include "logging.h" // Percentage cut-off for avoiding sending similar sensor readings. #define THRESHOLD_PERCENT_LOC 0.05 // Timeout for forcing a sending even if readings are similar [seconds]. #define TIME_LIMIT_LOC 900 size_t Location::read(char *buf, size_t maxLen, char *status, size_t num) { static const char *fmt = "108,%ld,%.2f,%.6f,%.6f\r\n109,%ld,%.2f,%.6f,%.6f"; GPSTracker::Position pos; if (!gpsTracker.position(&pos)) { return 0; } float data[3] = { pos.altitude, pos.latitude, pos.longitude }; if (abs(oldValues[0]-data[0]) <= abs(oldValues[0])*THRESHOLD_PERCENT_LOC && abs(oldValues[1]-data[1]) <= abs(oldValues[1])*THRESHOLD_PERCENT_LOC && abs(oldValues[2]-data[2]) <= abs(oldValues[2])*THRESHOLD_PERCENT_LOC) { time_t t_interval = time(NULL) - t_start; if (t_interval < TIME_LIMIT_LOC) { return 0; } } size_t l = snprintf(buf, maxLen, fmt, deviceID, data[0], data[1], data[2], deviceID, data[0], data[1], data[2]); if (status) { snprintf(status, num, "Send GPS %.1f,%.1f,%.1f", data[0], data[1], data[2]); } oldValues[0] = data[0]; oldValues[1] = data[1]; oldValues[2] = data[2]; t_start = time(NULL); return l; }