async rx mode

crossbow.ino

@@ -1,7 +1,7 @@
 #define DEVICE_MODE_TX
 // #define DEVICE_MODE_RX
 
-#define FEATURE_TX_OLED
+// #define FEATURE_TX_OLED
 // #define FORCE_TX_WITHOUT_INPUT
 
 // #define DEBUG_SERIAL
@@ -168,6 +168,7 @@ void setup(void)
     //Setup ISR callback and start receiving
     LoRa.onReceive(onReceive);
     LoRa.receive();
+    radioState.deviceState = RADIO_STATE_RX;
 
 #ifdef DEVICE_MODE_RX
     //initiallize default ppm values
@@ -261,9 +262,23 @@ int8_t getFrameToTransmit(QspConfiguration_t *qsp) {
 }
 #endif
 
+/*
+ * 
+ * Main loop starts here!
+ * 
+ */
 void loop(void)
 {
 
+    /*
+     * Detect the moment when radio module stopped transmittig and put it
+     * back in to receive state
+     */
+    if (radioState.deviceState == RADIO_STATE_TX && !LoRa.isTransmitting()) {
+        LoRa.receive();
+        radioState.deviceState = RADIO_STATE_RX;
+    }
+
     if (radioState.bytesToRead != NO_DATA_TO_READ) {
         LoRa.read(tmpBuffer, radioState.bytesToRead);
 
@@ -277,6 +292,7 @@ void loop(void)
         //After reading, flush radio buffer, we have no need for whatever might be over there
         LoRa.sleep();
         LoRa.receive();
+        radioState.deviceState = RADIO_STATE_RX;
 
         radioState.bytesToRead = NO_DATA_TO_READ;
     }
@@ -404,9 +420,11 @@ void loop(void)
         qspEncodeFrame(&qsp, tmpBuffer, &size);
         //Sent it to radio in one SPI transaction
         LoRa.write(tmpBuffer, size);
-        LoRa.endPacket();
-        //After ending packet, put device into receive mode again
-        LoRa.receive();
+        LoRa.endPacketAsync();
+
+        //Set state to be able to detect the moment when TX is done
+        radioState.deviceState = RADIO_STATE_TX;
+
         transmitPayload = false;
     }
 
@@ -515,6 +533,7 @@ void onReceive(int packetSize)
             */
             LoRa.sleep();
             LoRa.receive();
+            radioState.deviceState = RADIO_STATE_RX;
         }
     }
 }

lora.h

@@ -27,7 +27,7 @@ public:
   int endPacket();
 
   void endPacketAsync();
-  bool isTransmitting()
+  bool isTransmitting();
 
   int parsePacket(int size = 0);
   int packetRssi();

variables.h

@@ -74,6 +74,9 @@ enum debugConfigFlags {
 
 #define NO_DATA_TO_READ -1
 
+#define RADIO_STATE_TX 1
+#define RADIO_STATE_RX 2
+
 struct RadioState_t {
     uint32_t frequency = 867000000;
     uint32_t loraBandwidth = 250000;
@@ -83,6 +86,7 @@ struct RadioState_t {
     int8_t bytesToRead = -1;
     uint8_t rssi = 0;
     uint8_t snr = 0;
+    uint8_t deviceState = RADIO_STATE_RX;
 };
 
 struct TxDeviceState_t {