• This is a re-design of  OpenSprinkler 3.2 with is wireless version in nature and option for wired connection onto single board rather then 2 as the original was designed. There are few reasons for this that we will go into later on.  However we are using all SMD devices there was some issues with drive components that would make the board larger then necessary and we tried to avoid that. So its only capable of driving AC valves.
  
  The design incorporates ESP8266 controller and CH340G/C USB to serial converter. Power from USB port is sufficient to power the processor and associate circuitry however there is not sufficient current to drive the valves so please provide sufficient power through the terminal connection..
  
  Primary power circuit was redesigned and now is using AP1509 buck regulator. Secondly as the ESp has much less pins, decoder circuit has been changed to use PCA9555 controller along with LCD  wich both use I2C bus thus are capable of much easier expansion.
  
  With this new design, port expansion is not supported as expansion interface had been changed and you will need to use new expansion module
  
  
  Introducing a dual  AC / DC  version  of the controller capable of driving AC or DC valves with the addition of the voltage booster board borrowed from OS 2.3 version and adds barrow connector for DC version.  Output driving triacs will need to be replaced with NPN BJT transistor  (like 2n2222)  for the DC version
  Limitation of the board is that can only be configured for AC or DC   not a mix version.
   

  Features

    
  
   

  Documents

     Schematic
     PCB layout files   (easyEDA)
     Gerber Files 
     Gerber Files dual
     Bill of Materials
     ESP-12 / ESP8266-12
     74hc595
     AP1509
     CH340G
     Firmware