Here’s an ESP12-e WiFi
4 channel Cayenne controlled driver board.
Designed to replace a RainBird controller,
this PC board directly drives relays, solenoids, motors and electric valves
via WiFi, controlled by Cayenne
and accepts voltages from +8 to +28 volts.
Power input can be from standard 2mm Barrel connector or Sta-Kon crimps.
Choose to install either or both connectors.
Device outputs use .1" screw terminals.
Esp12-e is SMT bottom mounted with a cleared area for WiFi antenna.
Transistors are 2N2222, rated to pass up to +30V@1Amp,
diodes are 1N4001, resistors are 4k7/.125w, regulator is 78SR-3.3