ESP32 Forum

Hello there Espressif team!

I'm currently running a FreeRTOS application on ESP32. All the tasks are event-driven with the same priority.

I'm using the library PubSubClient to connect to AWS but I'm having a problem with the client.connect() function.

The AWS task inits the certificates and so on. At the end, it calls client.connect(). The problem is that this is a blocking function that is triggering the watchdog timer.

This is the error log: This problem is solved by pinning the AWS task to CPU 1, but I would like to keep all related wifi stuff in CPU 0 and CPU 1 for all the other tasks.

Is there any way to reset the watchdog timer even though this is a blocking function?

Thanks a lot in advance

You can increase the timeout of the watchdog timer before you connect and then set it back to 5 seconds when you are done.
If you are comfortable with freeRTOS/esp-idf/C, I'd suggest you take a look at the esp-mqtt library, which is a fully functional mqtt client (including all QoS and mqttv5). It is likely to be much faster than the layers upon layers of abstraction in PubSubClient. It allows async messaging.

Thanks for the quick reply.

Can you write ESP-IDF alongside the Arduino framework? I understand you can only choose one.

arduino-esp32 is a HAL built on top of the esp-idf. About 97% of the framework's functionality is available in Arduino. Some of the examples may need massaging if you want to use them in C++, but the code should all work.