LoRaWAN seems to work on ESP32

ampel-firmware.h

@@ -10,6 +10,9 @@
 #ifdef MQTT
 #  include "mqtt.h"
 #endif
+#ifdef LORAWAN
+#  include "lorawan.h"
+#endif
 
 #include "util.h"
 #include "wifi_util.h"

ampel-firmware.ino

@@ -99,7 +99,12 @@ void setup() {
     mqtt::initialize("CO2sensors/" + SENSOR_ID);
 #endif
   }
+
   csv_writer::initialize();
+
+#ifdef LORAWAN
+  lorawan::initialize();
+#endif
 }
 
 /*****************************************************************
@@ -107,6 +112,15 @@ void setup() {
  *****************************************************************/
 
 void loop() {
+#ifdef LORAWAN
+  //LMIC Library seems to be very sensitive to timing issues, so run it first.
+  lorawan::process();
+
+  if (lorawan::waiting_for_confirmation) {
+    // If node is waiting for join confirmation from Gateway, nothing else should run.
+    return;
+  }
+#endif
   //NOTE: Loop should never take more than 1000ms. Split in smaller methods and logic if needed.
   //TODO: Restart every day or week, in order to not let t0 overflow?
   uint32_t t0 = millis();

co2_sensor.cpp

@@ -175,11 +175,17 @@ namespace sensor {
       }
 
       logToSerial();
+
+      //TODO: Move the 3 back to ampel-firmware.ino and remove headers from co2_sensor.h
       csv_writer::logIfTimeHasCome(timestamp, co2, temperature, humidity);
 
 #ifdef MQTT
       mqtt::publishIfTimeHasCome(timestamp, co2, temperature, humidity);
 #endif
+
+#ifdef LORAWAN
+      lorawan::preparePayloadIfTimehasCome();
+#endif
     }
 
     if (should_calibrate) {

co2_sensor.h

@@ -13,6 +13,9 @@
 #ifdef MQTT
 #  include "mqtt.h"
 #endif
+#ifdef LORAWAN
+#  include "lorawan.h"
+#endif
 
 namespace config {
   extern uint16_t measurement_timestep; // [s] Value between 2 and 1800 (range for SCD30 sensor)

util.h

@@ -24,6 +24,8 @@ namespace ntp {
   String getLocalTime();
 }
 
+#define max(a,b) ((a)>(b)?(a):(b))
+#define min(a,b) ((a)<(b)?(a):(b))
 #define seconds() (millis() / 1000UL)
 extern uint32_t max_loop_duration;
 const extern String SENSOR_ID;