Aleatory crashes when calling setString() about firebase-esp8266

[mobizt]

Depending on your code, you should check free heap frequently somewhere on your code to debug for memory leak which can cause mcu to reset.

[kbssa]

Understood, but only the line of code below causes the crash.

Firebase.setString(updateFirebaseData, path + _nodeName + deviceFuction + String(_channel), _value);

If I comment it out the code runs pretty good.

Anyway I will look for memory leak.

[mobizt]

Every data must be converted to string internally for almost set functions and send as payload to server then setString() is not the causes because it directly send.

It is better to set debug level from Arduino IDE while choose Generic ESP8266 Module as board together with always print the ESP.getFreeHeap() and use ESP Exception Decoder addon in Arduino IDE to decode the error.

[ericpaepe]

Hello mobizt,

Running v 2.4.2 on 3 Esp8266's gave on all 5 to 10 "Wdt reset rst cause:4"/day. With v2.4.1 this seems OK.
I'm using : Firebase.pushJSON(firebaseData,"metingCV", message); in my code.
I will try the Generic ESP8266 Module , now I use NodeMCU 1.0(ESP-12E module).
Thanks for sharing your code.

Eric

[mobizt]

@ericpaepe
If you choose Generic ESP8266 Module, don't forget to choose Flash size.

I recommend to update to Core SDK to v2.5.2 because you will gain much more ram because BearSSL has better memory management which allows the library to reserve the known amount of ram for it.

Wdt reset issue caused by many possibilities depending on your free memory situation that effected to system operation, some long delay blocking code is minor issue that causes watchdog timer timed out.

Most of them is from memory leak and data is bigger than memory allocation.

To program ESP8266 and ESP32 you should strictly the memory usage and take care for all memory you used. Don't use String object too much in your code even it has it's own memory management (read this).