As per the topic. I am creating a DIY home automation at my home based on a raspberry pi (Home Assistant), esp32 mcp23017 to control relays and receive simple signals. I would like everything between esp32 mcp23017 to be wired together. The problem is that I can't find nice touch switches based on cable and 5v. I have a 12v switch and it can be set to high or low, the high 12v signal doesn't really fit the mcp23017. I understand that low can't really be used in a 5v circuit either?
I have 3 questions:
1. how to plug this switch into my circuit?
2. maybe there is a better solution to my problem?
3. general question: How are popular home automation systems and more constructed since they run on 12/24v and sometimes higher since all microcontrollers run on 3.3/5v chips? Can you know of any source to read? I can't find one on google, or I'm asking the question wrong.
I have 3 questions:
1. how to plug this switch into my circuit?
2. maybe there is a better solution to my problem?
3. general question: How are popular home automation systems and more constructed since they run on 12/24v and sometimes higher since all microcontrollers run on 3.3/5v chips? Can you know of any source to read? I can't find one on google, or I'm asking the question wrong.
