I agree, actually. However, I do think PM's are problematic in their current state because some users will send confidential information through those channels without realizing how easy it is for an admin to view that data in plain text.
Full disclosure: I'm merely cross-posting it.
This isn’t my project. I’m merely cross-posting it from a site that shall not be named.
Es(Pi)resso
fully modded Silvia, with digital pressure transducer, flow meter, driptray scale, variable pressure control (for pre- infusion), PID, e-ink display with info, live graphs and automated shots (based on desired graph).
http://www.espressomyespresso.com/Silvia/SilviaPID3.html
“Yes raspberry pi, got inspired by the “Es(pi)resso” project. Will share the write-up and code later. But tldr: raspberry pi, code in python, some SSRs, temperate sensor, pressure transducer, flow meter (spare part from a Nespresso machine), two 1kg load cells load cells under the drip tray (for scale).”
From left to right the buttons are: Standby (turns on the PID, and display), then the shot pull button (original button), hot water (original button), steam (original button), preinfusion button (turns on the pump at low power, around 2 bar, and when you turn it of it will keep the 3 way valve open for a bit). And then the Rotary encoder for selecting automated programs.
My reverse-engineered BOM:
- Raspberry Pi 3 or 4
- Rancilio Silvia
- ultrasonic sensor (to measure the distance to the water, and then calculate how full the tank is)
- 6x switches (9x momentary SPST, 3x On/Off Toggle)
- 1x rotary encoder w/ switch (CYT1100 Cylewet 5Pcs 360 Degree)
- Temperature Sensor: (Adafruit PT100 RTD Temperature Sensor Amplifier - MAX31865)
- 2 or 3 Solid State Relays
- pressure transducer
- leading edge digital dimmer (for preinfusion)
- Digmesa FHKSC 932-9521/B flow meter (EBay: $24.95)
- 2x 1kg Load cells
- 3” or 5” WaveShare e-ink display (needs custom firmware to update every 0.1 sec)
“I used a Digmesa FHKSC 932-9521/B which is the same as the once using in many domestic machines like those of Nespresso & Delonghi. They are extremely easy to interface, basically you count pulses and ~2000 pulses (you can calibrate this value yourself) corresponds to 1 liter of water in.
End of the cup ml is different then the grams out as a. Some water will remain in the puck, b. We are measuring what goes in, so we fully ignore the extracted coffee, c. The solenoid valve will release a tiny amount of water at the end of a shot directly in the drip tray. So i just add an offset for these (and luckily these are very consistent) and let is stop when my cup reaches xxgrams.”
Oh yes, haha keep forgetting that mod, I use an ultrasonic sensor measure the distance to the water, and then calculate how full the tank is (didn’t want any electronics touching the water).
IIRC, OP managed to get good performance from e-ink by being strategic about updating the display.
His reply when someone mentioned e-ink display rate issues:
"Does have some downsides though, as you have to be mindful of how often and when to refresh."
I am just cross-posting this. I am not OP. I agree on the color. I'd rather stainless steel. The rest of the machine is absurdly cool though.
Why are they even a company in the first place? They make an app that should objectively not be tied to profit-seeking.
Dear venture capitalist shitbags: get your money grubbing fingers off of technologies (like Reddit) that are objectively worse when tied to profit-seeking motives.
This is actually bad for Rust. At this point, any technology that that shitbag charlatan chooses deserves a critical second look. To be clear: I’m sure Rust is totally solid but Tesla engineering isn’t the badge of honor some of you fanbois think it is.
Also who the fuck cares? Studying Tesla’s engineering choices is like taking a master class in boneheaded, dangerous, hype-driven engineering decisions. A few years back, Elon decided that redundancy is overrated in the context of Tesla’s full self drive. He got rid of LiDAR and other redundant systems, directly causing the death of quite a few people who trusted his hype with their lives and the lives of others.
Move fast and break things….or as Elon’s motto goes, “move fast, over-promise, under-deliver, and kill people”.