I have here a link for a script for esp8266 there works like I want to have it but without deepsleep mode.
How can I convert it for esp32 and add deepsleep mode for the script.

Link to script: https://github.com/davolesh/mqtt_pushbutton/blob/master/mqtt_button_basement.ino?fbclid=IwAR3B8iLZdNf16XgTiUE6NKHuppoTlJSq4NfY747nNRQofyYWjomnEpMlOF4

Hi.

That example uses the PubSubClient library that should be compatible with the ESP32. So, I think you don’t need to change anything about that.

I recommend you test that script with the ESP32 and see if it works.

Then, because you want to put the ESP32 in deep sleep and wake it up with a button, you need to add an external wake-up.

Move all the code to the setup() function.

Then, enable external wake up with the following:

esp_sleep_enable_ext0_wakeup(GPIO_NUM_X, level)

This function accepts as first argument the pin you want to use, in this format GPIO_NUM_X, in which X represents the GPIO number of that pin.

The second argument, level, can be either 1 or 0. This represents the state of the GPIO that will trigger wake-up.

Note: you can only use pins that are RTC GPIOs with this wake-up source.

Finally, call the following function to start deep sleep:

esp_deep_sleep_start();

All of this is explained in this unit: https://rntlab.com/module-3/deep-sleep-external-wake-up/

Regards,

Sara

Thank you very much for your help 🙂