With ESP OpenSprinkler controller you can operate up to 32 SmartSolenoid valves 

  • OpenSprinkler is an widespread opensource smart controller sw that we have ported to ESP32 the espressif WiFi+Bluetooth embedded processor
  • OpenSprinkler do not need any custom HW or any addon board to control SmartSolenoid operated valves. A low cost ESP32 board better if equipped with a Oled LCD (see pictures), will be enough  .