TuyaMCU: add missing heartbeats event so we can reset cpu or take act…

…ion when something is wrong, sample script: addChangeHandler MissedHeartbeats > 4 setChannel 0 1

src/cmnds/cmd_eventHandlers.c

@@ -208,6 +208,8 @@ int EVENT_ParseEventName(const char *s) {
 		return CMD_EVENT_CUSTOM_DOWN;
 	if (!stricmp(s, "OnCustomUP"))
 		return CMD_EVENT_CUSTOM_UP;
+	if (!stricmp(s, "MissedHeartbeats"))
+		return CMD_EVENT_MISSEDHEARTBEATS;
 	if (isdigit((unsigned char)*s)) {
 		return atoi(s);
 	}

src/cmnds/cmd_public.h

@@ -126,6 +126,8 @@ enum EventCode {
 	CMD_EVENT_CUSTOM_DOWN,
 	CMD_EVENT_CUSTOM_UP,
 
+	CMD_EVENT_MISSEDHEARTBEATS,
+
 	// must be lower than 256
 	CMD_EVENT_MAX_TYPES
 };

src/driver/drv_tuyaMCU.c

@@ -137,6 +137,7 @@ const char* TuyaMCU_GetCommandTypeLabel(int t) {
 		return "TUYA_CMD_REPORT_STATUS_RECORD_TYPE";
 	return "Unknown";
 }
+
 typedef struct rtcc_s {
 	uint8_t       second;
 	uint8_t       minute;
@@ -348,6 +349,12 @@ tuyaMCUMapping_t* TuyaMCU_MapIDToChannel(int dpId, int dpType, int channel, int
 	return cur;
 }
 
+// now you can detect TuyaMCU faults with event handler
+// addChangeHandler MissedHeartbeats > 4 setChannel 0 1
+void TuyaMCU_SetHeartbeatTimer(int v) {
+	EventHandlers_ProcessVariableChange_Integer(CMD_EVENT_MISSEDHEARTBEATS, heartbeat_counter, v);
+	heartbeat_counter = v;
+}
 
 // header version command lenght data checksum
 // 55AA     00      00      0000   xx   00
@@ -1764,7 +1771,7 @@ void TuyaMCU_ProcessIncoming(const byte* data, int len) {
 	{
 	case TUYA_CMD_HEARTBEAT:
 		heartbeat_valid = true;
-		heartbeat_counter = 0;
+		TuyaMCU_SetHeartbeatTimer(0);
 		break;
 	case TUYA_CMD_MCU_CONF:
 		working_mode_valid = true;
@@ -2062,7 +2069,7 @@ void TuyaMCU_RunStateMachine_V3() {
 		/* Generate heartbeat to keep communication alove */
 		TuyaMCU_SendCommandWithData(TUYA_CMD_HEARTBEAT, NULL, 0);
 		heartbeat_timer = 3;
-		heartbeat_counter++;
+		TuyaMCU_SetHeartbeatTimer(heartbeat_counter+1);
 		if (heartbeat_counter >= 4)
 		{
 			/* unanswerred heartbeats -> lost communication */