espresso: Updates & improvements#1
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May 8, 2026 15:05
Support files included. Signed-off-by: Raffael Rostagno <raffael.rostagno@gmail.com>
Trust MAX6675 reads before heating; hold heater on SPI/open/range/stuck. Stuck-temp diag (>=20% duty, 3 frozen samples); LOOKUP overshoot learn discarded when stuck latches. RainMaker Status (Okay + worst latch) and temp line stays Ready/Low/High. LOOKUP trim scales full duty above 50%. Version 1.6.0, project espresso; defaults-only sdkconfig policy in PR. Signed-off-by: Raffael Rostagno <raffael.rostagno@gmail.com>
Improve the way heat buffering when water pump is on is implemented. A heat buffer vector is implemented to allow calibrating a heat profile following the amount of time in which the pump is on, in order to improve temperature stability in preinfusion, brew and flush operations. Signed-off-by: Raffael Rostagno <raffael.rostagno@espressif.com>
Update stock heat calibration for improved overshoot control. Signed-off-by: Raffael Rostagno <raffael.rostagno@espressif.com>
Files split for better organization. Rudimentary tasks converted to FreeRTOS tasks. Signed-off-by: Raffael Rostagno <raffael.rostagno@gmail.com>
TRIAC driver control only works with control values above a certain value. Update calibration and add notes for better control and temperature stability. Signed-off-by: Raffael Rostagno <raffael.rostagno@espressif.com>
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Update adaptive warmup strategy (adding warmup stall detector to overshoot detector) to manage both temperature overshoot condition or warmup stall. Tweak power dither near setpoint to improve temperature control during warmup. Signed-off-by: Raffael Rostagno <raffael.rostagno@espressif.com>
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Summary
Firmware and Espresso UI (RainMaker) updates include new controls, safety improvements, and a fix to TRIAC GPIO initialization to prevent unintended heating during boot.
Changes
UI (RainMaker)
Temperature Control (LOOKUP)
Sensor Monitoring / Safety (Firmware)
TRIAC GPIO Initialization Fix (Firmware)
Project