Hello, I’m a DIY beginner. I have an inexpensive humidifier with only two buttons. I want to integrate these two buttons with ESP32 and ESPHome into Home Assistant, similar to [Stateful momentary switch with ESPHome](https://Stateful momentary switch with ESPHome), but I’m unsure how to wire them.
Do I need any additional hardware?
There is probably voltage present on those pins. You will need an optocoupler or a relay to connect the ESP to the switch.
https://www.aliexpress.com/item/32952579553.html
They come in single channel and multi channel versions.
Ultimately you’ll have to break out a multimeter and see what you’re dealing with. Hopefully the buttons simply short to ground when pushed, which means you can simulate the same via your ESP.
Thank you for your response. It seems I oversimplified things. I’ll look into how to use a relay.
Thanks. Unfortunately, I don’t have a multimeter. I might buy a set later; it looks like it’s a necessary item for learning ESP32.
An inexpensive one would be more than adequate and as you mentioned, honestly is a must-have in your toolbox for these kinds of projects. Have fun diving into this world!
Well two switch bots for two buttons, and clunky as hell, not to mention €30 each.
Yes you need a meter for this sort of stuff.
I received the relay and the multimeter that I purchased. I’ve already tried connecting them to the humidifier, and it works well. Next, I will start learning the methods of soldering and using the multimeter. Thanks again, everyone.
Thank you for the advice, but I intend to take this opportunity to delve into DIY with ESP.
The moment of successful attempt today was truly joyful. I have purchased a multimeter and identified the power interface of the original humidifier. Next, I will try to split the power supply to the ESP32.
Awesome, glad you’re having fun!