The Irrigation System is envisaged to comprise a number of the Zone Controllers connected via a wireless network with a Central Control Unit. Wireless control of the functions requires firmware in the ESP8266. Powerful as it is this incredible device does have limitations on usable aMemory space and processing power. These limitations effectively rule out the use of Interpreter languages such as Basic or Lua so most of my weekend was spent setting up the Arduino ESP8266 Software Development Environment (SDK) to allow me to program in C+ + and generate more efficient binary files for the firmware.