PubSubClient (PASS)

[woolseyj]

Compilation of the PubSubClient library fails with the following error:
"error: 'strnlen' was not declared in this scope" and suggests using 'strlen' as an alternative.

It appears the strnlen() function is not defined for the Renesas architecture.

I tried to compile the mqtt_basic example sketch with a few modifications related to changing the Ethernet library for the WiFiS3 library.

The verbose log file is enclosed.

mqtt_basic_compile_log.txt

[tony2feathers]

I made a fork of PubSubClient which addresses these issues. I have tested it and have managed to get it to connect to my wifi and connect to the test.mosquitto.org mqtt broker. I am having problems with my local broker for some reason, and I'm unsure what the cause is, but the new forked library works as far as I can tell. https://github.com/tony2feathers/pubsubclient_UnoR4

[woolseyj]

The issue was resolved in the ArduinoCore-renesas library. The PubSubClient library is now working properly with the Arduino R4 WiFi board.

[Hannes7eicher]

I added it here.