Release status: experimental [box doku]
|Description||An overengineered espresso machine mod.|
q3k's espresso machine (Rancilio Silvia) is not in service anymore after he got a new dual-boiler machine for home.
Why not make the old machine an over-engineered workhorse, and maybe keep it at the space for espresso freaks to use?
Instead of the stock bang-bang control, it should have PID control of the boiler temperature.
Using pressure sensor(s) and flow sensor(s) we should be able to control the pump to maintain constant flow/pressure.
WIFI/Ethernet connectivity for pre-heating the machine remotely / on a timer. Also the ability to see/export brew session data (flow/pressure/temperature graphs).
Integrated (Acaia?) scale for doing coffee-in-liquid-out weight measurement.
Probably removing it, keeping it as a pure espreso machine (also less of a problem to clean).
The brains of the operation will be either based around an RP2040 microcontroller or a QF105 Microcontroller (if it works). An ESP32 will be used for Internet connectivity.
TODO in somewhat sorted order:
- Take apart and clean (DONE)
- Fix pump hose
- Buy pressure sensors (DONE)
- Buy temperature sensors
- Design main control board (waiting for qf105, ETA 2023? :/)