Triac control via ESP32 - zero detection and controller connection from AliExpress

If you want to control the triac via the ESP, the simplest solution is to use an intermediate circuit - an optotriac. This is a kind of optocoupler, but it has a triac at its output. The tiny triac is used to switch the large triac. And if, in addition, you want to switch it at zero mains voltage, I recommend using an optotrianc with zero detection function. You can give the optotriac diode control voltage at any time, the circuit in it will wait until the voltage passes zero and only then will it switch on the output triac and thus the large triac.