Add modem comm timeout error code

RNode_Firmware.ino

@@ -163,6 +163,10 @@ void setup() {
     // probe boot parameters.
     if (LoRa->preInit()) {
       modem_installed = true;
+      
+      #if HAS_INPUT
+        // Skip quick-reset console activation
+      #else
         uint32_t lfr = LoRa->getFrequency();
         if (lfr == 0) {
           // Normal boot
@@ -177,6 +181,8 @@ void setup() {
           // Unknown boot
         }
         LoRa->setFrequency(M_FRQ_S);
+      #endif
+
     } else {
       modem_installed = false;
     }
@@ -573,7 +579,14 @@ void transmit(uint16_t size) {
         }
       }
 
-      LoRa->endPacket(); add_airtime(written);
+      if (!LoRa->endPacket()) {
+        kiss_indicate_error(ERROR_MODEM_TIMEOUT);
+        kiss_indicate_error(ERROR_TXFAILED);
+        led_indicate_error(5);
+        hard_reset();
+      }
+      add_airtime(written);
+
     } else {
       // In promiscuous mode, we only send out
       // plain raw LoRa packets with a maximum
@@ -988,8 +1001,14 @@ void serialCallback(uint8_t sbyte) {
           bt_start();
           bt_conf_save(true);
         } else if (sbyte == 0x02) {
+          if (bt_state == BT_STATE_OFF) {
+            bt_start();
+            bt_conf_save(true);
+          }
+          if (bt_state != BT_STATE_CONNECTED) {
             bt_enable_pairing();
           }
+        }
       #endif
     } else if (command == CMD_DISP_INT) {
       #if HAS_DISPLAY