文件列表:

A7-tracker.ino (3490, 2020-06-27)
A7.cpp (9779, 2020-06-27)
A7.h (1520, 2020-06-27)
config.h (214, 2020-06-27)

# A7 Tracker Tracker based on [Elecrow 32u4 with A7 GPRS/GSM board](https://www.elecrow.com/wiki/index.php?title=32u4_with_A7_GPRS/GSM) ## Prerequisites - [Arduino IDE 1.8.3](https://www.arduino.cc/en/Main/Software) or greater - [ArduinoJson V5.13.5](https://arduinojson.org/) library (install via Arduinos library manager) ## Getting Started - Clone this repository - Change server addresses in A7.h ## Setup - modify settings from config.h ## Data structures ### Position update Tracker sends this message to the server: ```javascript {"id":"254574","fix":1,"uptime":4115154,"signal":31,"batt":89,"lat":"5106.9792","lat_d":"N","lon":"11402.3003","lon_d":"W","nSat":8,"acc":7} ``` | Key | Possible values | Comment | |--------|-----------------|---------------------------------------------------------------------------------| | id | 000000-999999 | last digits of device IMEI | | fix | 0,1 | availability of GPS signal | | uptime | 0-4294967296(~49 days) | tracker uptime in milliseconds | | signal | 0-33, 99 | signal strength, [reference](https://m2msupport.net/m2msupport/signal-quality/) | | batt | 0-100 | battery charge level | | lat | | latitude, (d)ddmm.mmmm format | | lat_d | N, S | | | lon | | longitude, (d)ddmm.mmmm format | | lon_d | E, W | | | nSat | 0-20 | number of satellites the receiver sees | | acc | 0-100 | accuracy in meters | ### Settings update Tracker expects this response from server: ```javascript {"loc_interval":"60", "set_interval":"100"} ``` | Key | Possible values | Comment | |--------------|-----------------|---------------------------------------| | loc_interval | 0-4294967295 | Location sending interval in seconds | | set_interval | 0-4294967295 | Settings fetching interval in seconds | ## Changelog ### V2.0 (Apr 2020) - new functions - send battery level - send network signal strength - watchdog timer - non blocking delay - check that modem is alive and connected - send message even if no GPS fix - switch GPS off when not needed - enhancements - move modem related code to AiA7 class - simplify sendAT function - bugfixes - GPGGA parsing bug - reboot modem correctly

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