I come back from my novice doubts
1 / If PCF8575 is used the pins 47 (ozonizer), 48 (CO2 reactor), A6, A7 and A8 would be free?
2 / In case of using ESP8266 as wifi module could the pins 16 and 17 of the multiplexer of stamps be moved to the pins 47 and 48? Or would it be possible to use the analog pins A6 and A7?
3 / using PCF8575 to the relay module 1 would only the heater pin 42 and the cooler pin 43?
Thanks