Currently this bad boy has two modes: hit and hold. Hit turns on the heat until the set temperature is hit, then shuts off. Hold tries to hold the temperature at the setpoint.

It also has a FTDI USB to UART IC, so it can be loaded with optiboot (after a green-wire fix. Oops.)

Current hardware version is 0.1.1

Planned for v0.2:

- Second display for either set-temp or time

- Crystal oscillator for better UART and USB circuit fixes

- On board AC to DC converter (so board can be inserted inline between wall and appliance)

- PI or PID control in the firmware (current hold algorithm is super-basic)

- Application (probably Processing) to control over USB from compute​