OpenSprinkler › Forums › Comments, Suggestions, Requests › Opensprinkler on ESP8266 › Reply To: Opensprinkler on ESP8266
June 5, 2017 at 3:39 pm #46579
I am afraid you need to consider that you have to leave 3 GPio for input buttons and you may want to have 2 GPio for i2c for example for a LCD.
As a consequence you have only 3 pin available for valve control. You better use an i2c expander PCF8274 to drive the 8 output relay!