(homieiot#648) Tweaks to avoid OTA halting when using TLS.

+ During OTA do not publish any messages that are not OTA related
+ Publish 1 every 100 206 status messages

Author: Nicolas Emiliani

src/Homie/Boot/BootNormal.cpp

@@ -139,6 +139,7 @@ void BootNormal::loop() {
     return;
   }
 
+  if (_otaOngoing) return;
   // here, we finished the advertisement
 
   if (!_mqttConnectNotified) {
@@ -211,13 +212,27 @@ char* BootNormal::_prefixMqttTopic(PGM_P topic) {
 }
 
 bool BootNormal::_publishOtaStatus(int status, const char* info) {
-  String payload(status);
-  if (info) {
-    payload.concat(F(" "));
-    payload.concat(info);
+  static uint8_t count = 0;
+
+  bool send = false;
+  if (status != 206) {
+    send = true;
+  } else if (count == 100) {
+    count = 0;
+    send = true;
+    ++count;
   }
 
-  return Interface::get().getMqttClient().publish(_prefixMqttTopic(PSTR("/$implementation/ota/status")), 0, true, payload.c_str()) != 0;
+  if (send) {
+    String payload(status);
+    if (info) {
+      payload.concat(F(" "));
+      payload.concat(info);
+    }
+    return Interface::get().getMqttClient().publish(
+              _prefixMqttTopic(PSTR("/$implementation/ota/status")), 0, true, payload.c_str()) != 0;
+  }
+  return false;
 }
 
 void BootNormal::_endOtaUpdate(bool success, uint8_t update_error) {