Serial control

On the ESP32 serial port, there's a simple command line interface implemented.

Serial commands

Command	Argument	Description
TM	deg. C	Simulate main burner temperature
TA	deg. C	Simulate afterburner temperature
SS		Create screenshot

Temperature simulation

The temperature of the burn chambers can be simulated to facilitate testing of the incineration logic w/o actual burning. To enable temperature simulation, the firmware needs to be built with -DENABLE_TEMP_SIMULATION.

Temperature simulation tool

The script temp_sim.py can be used to conduct temperature simulation while testing. The keys e, r, d, f and u, i, j, k lower or raise the main and afterburner temperature, respectively.

Screenshots

SS creates a screenshot. It prints out a base64-encoding of a PNM file containing the current screen contents.

The base64 dump can be easily converted to a PNG file using the following shell snippet (needs imagemagick to work):

base64 -d | convert pnm:- screenshot.png