There are 2 channel and 4 channel controllers. Both versions are powered from 12V power supply with cigarette plug. There is 4A fuse in the plug limiting the total power available to all heaters to 48W. Each channel is limited to 36W.

  1. Short press switches between channels

    step1

  2. Long press activates power level mode

    step2

  3. In power level mode, short press adjusts power output. Each light represents 25% of total power.

    step3

  4. In power level mode, long press turns the mode off. After that short press switches between channels (see point 1)

    step4

Get the controller from the dewheater.com

Source code for the controller firmware is available from github repository

Flashing instructions are described in flashing section.