Browse Source

Implement GPS delta checking

master
Starbeamrainbowlabs 3 years ago
parent
commit
cf1e49f08d
  1. 26
      iot/main/gps.cpp
  2. 9
      iot/main/settings.h
  3. 10
      iot/main/storage.cpp
  4. 13
      iot/main/storage.h

26
iot/main/gps.cpp

@ -1,7 +1,10 @@
#include <TinyGPS.h>
#include "gps.h"
#include "settings.h"
#include "power.h"
#include "storage.h"
#include <TinyGPS.h>
SoftwareSerial gps_begin() {
// FUTURE: If this doesn't work as expected, we may want to find a more reliable SoftwareSerial library
@ -67,6 +70,27 @@ GPSLocation gps_fetch() {
// gps.f_get_position pushes the values into result directly
#ifdef GPS_DELTA_CHECK
float last_reading_lat = store_eeprom_float_retrieve(sizeof(uint32_t) * 2);
float last_reading_lng = store_eeprom_float_retrieve(sizeof(uint32_t) * 2 + sizeof(float));
// Serial.println(last_reading_lat);
// Serial.println(last_reading_lng);
// Serial.println(result.lat);
// Serial.println(result.lng);
if(abs(last_reading_lat - result.lat) < GPS_DELTA_MIN_LAT &&
abs(last_reading_lng - result.lng) < GPS_DELTA_MIN_LNG &&
last_reading_lat == last_reading_lat && // Ensure that the last readings aren't NaN
last_reading_lng == last_reading_lng) {
Serial.println(F("[gps] No movement detected"));
power_off();
}
// Save this location to EEPROM
store_eeprom_float_save(sizeof(uint32_t) * 2, result.lat);
store_eeprom_float_save(sizeof(uint32_t) * 2 + sizeof(float), result.lng);
#endif
// TODO: Don't send a message at night
#ifdef SD_DEBUG_ENABLED
int year;
byte month, day, hour, minute, second, _hundredths;

9
iot/main/settings.h

@ -51,7 +51,7 @@
// the RX pin, and the GPS device transmits messages on the TX.
#define PIN_GPS_RX 5
// The *RX* pin on the GPS device.
// This is swapped because where the GPs device is receiving, we aresending and
// This is swapped because where the GPS device is receiving, we aresending and
// vice versa.
// The TX / RX here are according to *our* side, not the GPS device's side.
#define PIN_GPS_TX 4
@ -61,6 +61,13 @@
// 9600 is the correct speed for a NEO-6M.
#define BAUD_GPS 9600
// Uncomment to cause the system to check the newest GPS value against the last one, and only transmit a reading if they differ by more than (0.0003, 0.0002) - ~(20m, 14m).
// Unhelpful for debugging, but useful in production to reduce the number of messages sent when stationary.
#define GPS_DELTA_CHECK
#define GPS_DELTA_MIN_LAT 0.0003
#define GPS_DELTA_MIN_LNG 0.0002
//////////////////////////////////
////////// microSD Card //////////
//////////////////////////////////

10
iot/main/storage.cpp

@ -61,3 +61,13 @@ uint32_t store_eeprom_uint32_retrieve(uint8_t offset) {
EEPROM.get(offset, result);
return result;
}
void store_eeprom_float_save(uint8_t offset, float value) {
EEPROM.put(offset, value);
}
float store_eeprom_float_retrieve(uint8_t offset) {
float result;
EEPROM.get(offset, result);
return result;
}

13
iot/main/storage.h

@ -35,5 +35,18 @@ void store_eeprom_uint32_save(uint8_t offset, uint32_t value);
*/
uint32_t store_eeprom_uint32_retrieve(uint8_t offset);
/**
* The same as store_eeprom_uint32_save, but for floats
* @param offset The offset to save the value to.
* @param value The value to save
*/
void store_eeprom_float_save(uint8_t offset, float value);
/**
* The same as store_eeprom_uint32_retrieve, but for floats
* @param offset The offset to retrieve from
* @return The retreived value
*/
float store_eeprom_float_retrieve(uint8_t offset);
// void store_end();

Loading…
Cancel
Save