Error writing every 3 minutes

[biagio983]

Hi,

I have a procedure that every 3 minutes write a string on RealtimeDatebase.
Now, I started to receive this message when try write:

[922078][E][WiFiClient.cpp:429] write(): fail on fd 48, errno: 104, "Connection reset by peer"

ERROR.mUpdateEngine: Error writing to basic client.
ERROR.connected: Not connected because write error is set.
ERROR.connected: SSL Write error
ERROR.write: Failed while waiting for the engine to enter BR_SSL_SENDAPP.

Anyone could help me?

[mobizt]

That is the ESP32 WiFiClient bug.

You have to read and follow this.

https://github.com/mobizt/FirebaseClient?tab=readme-ov-file#running-many-tasks-concurrency-using-different-async-clients-in-different-ssl-clients <-- see the warning in this section.

FirebaseClient/examples/RealtimeDatabase/Async/Callback/StreamConcurentcy/StreamConcurentcy.ino

Lines 117 to 122 in af0c43d

	// In ESP32, when using WiFiClient with ESP_SSLClient, the WiFiClient was unable to detect
	// the server disconnection in case server session timed out and the TCP session was kept alive for reusage.
	// The TCP session timeout in seconds (>= 60 seconds) can be set via `ESP_SSLClient::setSessionTimeout`.
	ssl_client1.setSessionTimeout(150);
	ssl_client1.setSessionTimeout(150);
	ssl_client3.setSessionTimeout(150);