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Own fork of MbedSmartRestMain
Dependencies: C027_Support C12832 LM75B MMA7660 MbedSmartRest mbed-rtos mbed
Fork of MbedSmartRestMain by
measurement/Location.cpp@100:dbcd3bc51758, 2015-05-08 (annotated)
- Committer:
- xinlei
- Date:
- Fri May 08 12:19:57 2015 +0000
- Revision:
- 100:dbcd3bc51758
- Child:
- 117:e831cdb799ab
v2.1rc3
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
xinlei | 100:dbcd3bc51758 | 1 | #include <stdio.h> |
xinlei | 100:dbcd3bc51758 | 2 | #include "Location.h" |
xinlei | 100:dbcd3bc51758 | 3 | #include "SmartRestConf.h" |
xinlei | 100:dbcd3bc51758 | 4 | #include "logging.h" |
xinlei | 100:dbcd3bc51758 | 5 | |
xinlei | 100:dbcd3bc51758 | 6 | // Percentage cut-off for avoiding sending similar sensor readings. |
xinlei | 100:dbcd3bc51758 | 7 | #define THRESHOLD_PERCENT_LOC 0.05 |
xinlei | 100:dbcd3bc51758 | 8 | // Timeout for forcing a sending even if readings are similar [seconds]. |
xinlei | 100:dbcd3bc51758 | 9 | #define TIME_LIMIT_LOC 900 |
xinlei | 100:dbcd3bc51758 | 10 | |
xinlei | 100:dbcd3bc51758 | 11 | size_t Location::read(char *buf, size_t maxLen, char *status, size_t num) |
xinlei | 100:dbcd3bc51758 | 12 | { |
xinlei | 100:dbcd3bc51758 | 13 | static const char *fmt = "108,%ld,%.2f,%.6f,%.6f\r\n109,%ld,%.2f,%.6f,%.6f"; |
xinlei | 100:dbcd3bc51758 | 14 | GPSTracker::Position pos; |
xinlei | 100:dbcd3bc51758 | 15 | if (!gpsTracker.position(&pos)) { |
xinlei | 100:dbcd3bc51758 | 16 | return 0; |
xinlei | 100:dbcd3bc51758 | 17 | } |
xinlei | 100:dbcd3bc51758 | 18 | float data[3] = { pos.altitude, pos.latitude, |
xinlei | 100:dbcd3bc51758 | 19 | pos.longitude }; |
xinlei | 100:dbcd3bc51758 | 20 | |
xinlei | 100:dbcd3bc51758 | 21 | if (abs(oldValues[0]-data[0]) <= abs(oldValues[0])*THRESHOLD_PERCENT_LOC && |
xinlei | 100:dbcd3bc51758 | 22 | abs(oldValues[1]-data[1]) <= abs(oldValues[1])*THRESHOLD_PERCENT_LOC && |
xinlei | 100:dbcd3bc51758 | 23 | abs(oldValues[2]-data[2]) <= abs(oldValues[2])*THRESHOLD_PERCENT_LOC) { |
xinlei | 100:dbcd3bc51758 | 24 | time_t t_interval = time(NULL) - t_start; |
xinlei | 100:dbcd3bc51758 | 25 | if (t_interval < TIME_LIMIT_LOC) { |
xinlei | 100:dbcd3bc51758 | 26 | return 0; |
xinlei | 100:dbcd3bc51758 | 27 | } else { |
xinlei | 100:dbcd3bc51758 | 28 | aDebug("GPS: Timeout at %d s.\n", t_interval); |
xinlei | 100:dbcd3bc51758 | 29 | } |
xinlei | 100:dbcd3bc51758 | 30 | } |
xinlei | 100:dbcd3bc51758 | 31 | size_t l = snprintf(buf, maxLen, fmt, deviceID, data[0], data[1], |
xinlei | 100:dbcd3bc51758 | 32 | data[2], deviceID, data[0], data[1], data[2]); |
xinlei | 100:dbcd3bc51758 | 33 | if (status) { |
xinlei | 100:dbcd3bc51758 | 34 | snprintf(status, num, "Send GPS %.1f,%.1f,%.1f", |
xinlei | 100:dbcd3bc51758 | 35 | data[0], data[1], data[2]); |
xinlei | 100:dbcd3bc51758 | 36 | } |
xinlei | 100:dbcd3bc51758 | 37 | oldValues[0] = data[0]; |
xinlei | 100:dbcd3bc51758 | 38 | oldValues[1] = data[1]; |
xinlei | 100:dbcd3bc51758 | 39 | oldValues[2] = data[2]; |
xinlei | 100:dbcd3bc51758 | 40 | t_start = time(NULL); |
xinlei | 100:dbcd3bc51758 | 41 | return l; |
xinlei | 100:dbcd3bc51758 | 42 | } |