async rx mode

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 {