Reduce power consumption on ESP32

[JshStadler]

The below can be added to the YAML for the ESP to reduce the clock speed of the ESP32 to lower power consumption. It's the lowest speed that supports Wi-Fi, and it works perfectly for me:

esphome:
  platformio_options:
    board_build.f_cpu: 80000000L

I'm not sure how to share this here without logging an "issue".

[wernerhp]

How much does it reduce the power by? Is it a significant amount? Do you have any benchmarks?

[JshStadler]

@wernerhp
Not exactly, but it does make a slight difference. And just for controlling the gate it doesn't need the extra speed.
Below are some indications, but I can't confirm how accurate they are.

https://esp32.com/viewtopic.php?t=2662#:~:text=At%2080%20MHz%2C%20with%20two,one%20CPU%20it%20consumes%2040mA.