ESP32 playing sound example

[pcbreflux]

There maybe many other ways to play sounds with the ESP32 but this is my example:

https://github.com/pcbreflux/espressif/ ... pio_buzzer

Press GPIO 0 button!

[pcbreflux]

Works also with a small speaker. Hopefully the GPIO will no be abused?

[loboris]

I would recommend using 100 ohm resistor and 10uF (+ toward gpio) capacitor between GPIO and speaker or the gpio eventualy will be damaged.

[pcbreflux]

Thank you, if I realy think about it (not just try it without a thought) - the speaker is rated 8 Ohms and if the esp32 is supplied with 3.3V the current can peek at 412.5mA - way to high for the gpio. With the 100Ohms its down to 30mA.