Hello I'm currently interested in finding a way to use Google assistant on my cellphone in order to activate GPIO pins on a raspberry pi/Arduino/esp32. I would like to discard options with web interfaces like ifttt or others but I'd prefer to use a library or something else on my arduino/raspberry/esp32 program (preferably in C or python). Maybe a thing that through Google assistant and internet sends a code to my raspi/arduino/esp32 and gets executed by a program running on it. Any suggestions/solutions?
You should read the smart home documentation and follow the codelab to learn more about the platform.