gps-code restructured, i2c gps now working

src/globals.h

@@ -55,6 +55,7 @@ extern std::array<uint64_t, 0xff>::iterator it;
 extern std::array<uint64_t, 0xff> beacons;
 
 #ifdef HAS_GPS
+extern TaskHandle_t GpsTask;
 #include "gps.h"
 #endif
 

src/gps.cpp

@@ -25,19 +25,23 @@ void gps_loop(void *pvParameters) {
 // initialize and, if needed, configure, GPS
 #if defined GPS_SERIAL
   HardwareSerial GPS_Serial(1);
-  GPS_Serial.begin(GPS_SERIAL); // serial connect to GPS device
+  GPS_Serial.begin(GPS_SERIAL);
 
 #elif defined GPS_QUECTEL_L76
+  uint8_t ret;
   Wire.begin(GPS_QUECTEL_L76, 400000); // I2C connect to GPS device with 400 KHz
-  uint8_t i2c_ret;
   Wire.beginTransmission(GPS_ADDR);
-  Wire.write(0x00);                 // dummy write to start read
-  i2c_ret = Wire.endTransmission(); // check if chip is seen on i2c bus
+  Wire.write(0x00);             // dummy write
+  ret = Wire.endTransmission(); // check if chip is seen on i2c bus
 
-  if (i2c_ret) {
-    ESP_LOGE(TAG, "Quectel L76 GPS chip not found on i2c bus, bus error %d",
-             i2c_ret);
-    return;
+  if (ret) {
+    ESP_LOGE(TAG,
+             "Quectel L76 GPS chip not found on i2c bus, bus error %d. "
+             "Stopping GPS-Task.",
+             ret);
+    vTaskDelete(GpsTask);
+  } else {
+    ESP_LOGI(TAG, "Quectel L76 GPS chip found.");
   }
 
 #endif
@@ -46,31 +50,18 @@ void gps_loop(void *pvParameters) {
 
     if (cfg.gpsmode) {
 #if defined GPS_SERIAL
-
-      while (cfg.gpsmode) {
       // feed GPS decoder with serial NMEA data from GPS device
       while (GPS_Serial.available()) {
         gps.encode(GPS_Serial.read());
       }
-        vTaskDelay(2 / portTICK_PERIOD_MS); // reset watchdog
-      }
-      // after GPS function was disabled, close connect to GPS device
-      GPS_Serial.end();
-
 #elif defined GPS_QUECTEL_L76
-
-      while (cfg.gpsmode) {
-        Wire.requestFrom(GPS_ADDR,
-                         128); // 128 is Wire.h buffersize arduino-ESP32
+      Wire.requestFrom(GPS_ADDR, 32); // caution: this is a blocking call
       while (Wire.available()) {
         gps.encode(Wire.read());
-          vTaskDelay(2 / portTICK_PERIOD_MS); // delay see L76 datasheet
-        }
-        vTaskDelay(2 / portTICK_PERIOD_MS); // reset watchdog
-      }
-
-#endif // GPS Type
+        vTaskDelay(2 / portTICK_PERIOD_MS); // 2ms delay according L76 datasheet
       }
+#endif
+    } // if (cfg.gpsmode)
 
     vTaskDelay(2 / portTICK_PERIOD_MS); // reset watchdog
 

src/lorawan.cpp

@@ -103,7 +103,7 @@ void get_hard_deveui(uint8_t *pdeveui) {
   i2c_ret = Wire.endTransmission();
 
   // check if device was seen on i2c bus
-  if (ic2_ret == 0) {
+  if (i2c_ret == 0) {
     char deveui[32] = "";
     uint8_t data;
 

src/main.cpp

@@ -52,6 +52,10 @@ TaskHandle_t LoraTask = NULL;
 QueueHandle_t SPISendQueue;
 #endif
 
+#ifdef HAS_GPS
+TaskHandle_t GpsTask = NULL;
+#endif
+
 portMUX_TYPE timerMux =
     portMUX_INITIALIZER_UNLOCKED; // sync main loop and ISR when modifying IRQ
                                   // handler shared variables
@@ -280,7 +284,7 @@ void setup() {
   // (note: arduino main loop runs on core 1, too)
   // https://techtutorialsx.com/2017/05/09/esp32-get-task-execution-core/
 
-  ESP_LOGI(TAG, "Starting Lora task on core 1");
+  ESP_LOGI(TAG, "Starting Lora...");
   xTaskCreatePinnedToCore(lorawan_loop, "loraloop", 2048, (void *)1,
                           (5 | portPRIVILEGE_BIT), &LoraTask, 1);
 #endif
@@ -289,22 +293,20 @@ void setup() {
 // higher priority than wifi channel rotation task since we process serial
 // streaming NMEA data
 #ifdef HAS_GPS
-  if (cfg.gpsmode) {
-    ESP_LOGI(TAG, "Starting GPS task on core 0");
-    xTaskCreatePinnedToCore(gps_loop, "gpsloop", 2048, (void *)1, 2, NULL, 0);
-  }
+  ESP_LOGI(TAG, "Starting GPS...");
+  xTaskCreatePinnedToCore(gps_loop, "gpsloop", 2048, (void *)1, 2, &GpsTask, 0);
 #endif
 
 // start BLE scan callback if BLE function is enabled in NVRAM configuration
 #ifdef BLECOUNTER
   if (cfg.blescan) {
-    ESP_LOGI(TAG, "Starting BLE task on core 1");
+    ESP_LOGI(TAG, "Starting Bluetooth...");
     start_BLEscan();
   }
 #endif
 
   // start wifi in monitor mode and start channel rotation task on core 0
-  ESP_LOGI(TAG, "Starting Wifi task on core 0");
+  ESP_LOGI(TAG, "Starting Wifi...");
   wifi_sniffer_init();
   // initialize salt value using esp_random() called by random() in
   // arduino-esp32 core. Note: do this *after* wifi has started, since