Set critical error and reboot when radio fails to generate tx IRQ

src/mesh/NodeDB.cpp

@@ -7,6 +7,7 @@
 #include "CryptoEngine.h"
 #include "FSCommon.h"
 #include "GPS.h"
+#include "main.h"
 #include "MeshRadio.h"
 #include "NodeDB.h"
 #include "PacketHistory.h"
@@ -583,8 +584,14 @@ NodeInfo *NodeDB::getOrCreateNode(NodeNum n)
 /// Record an error that should be reported via analytics
 void recordCriticalError(CriticalErrorCode code, uint32_t address)
 {
+    // Print error to screen and serial port
+    String lcd = String("Critical error ") + code + "!\n";
+    screen->print(lcd.c_str());
     DEBUG_MSG("NOTE! Recording critical error %d, address=%x\n", code, address);
+    
+    // Record error to DB
     myNodeInfo.error_code = code;
     myNodeInfo.error_address = address;
     myNodeInfo.error_count++;
+
 }

src/mesh/RadioLibInterface.cpp

@@ -3,6 +3,7 @@
 #include "NodeDB.h"
 #include "SPILock.h"
 #include "mesh-pb-constants.h"
+#include "error.h"
 #include <configuration.h>
 #include <pb_decode.h>
 #include <pb_encode.h>
@@ -67,9 +68,18 @@ bool RadioLibInterface::canSendImmediately()
     bool busyTx = sendingPacket != NULL;
     bool busyRx = isReceiving && isActivelyReceiving();
 
+
     if (busyTx || busyRx) {
         if (busyTx)
             DEBUG_MSG("Can not send yet, busyTx\n");
+        // If we've been trying to send the same packet more than one minute and we haven't gotten a
+        // TX IRQ from the radio, the radio is probably broken.
+        if (busyTx && (millis() - lastTxStart > 60000)){
+            DEBUG_MSG("Hardware Failure! busyTx for more than 60s\n");
+            recordCriticalError(CriticalErrorCode_TransmitFailed);
+            if (busyTx && (millis() - lastTxStart > 65000)) // After 5s more, reboot
+                ESP.restart();
+        }
         if (busyRx)
             DEBUG_MSG("Can not send yet, busyRx\n");
         return false;

src/mesh/generated/mesh.pb.h

@@ -76,7 +76,8 @@ typedef enum _CriticalErrorCode {
     CriticalErrorCode_Unspecified = 4,
     CriticalErrorCode_UBloxInitFailed = 5,
     CriticalErrorCode_NoAXP192 = 6,
-    CriticalErrorCode_InvalidRadioSetting = 7
+    CriticalErrorCode_InvalidRadioSetting = 7,
+    CriticalErrorCode_TransmitFailed = 8
 } CriticalErrorCode;
 
 typedef enum _ChannelSettings_ModemConfig {