this fork is a wip

silvia-pi

A Raspberry Pi modification to the Rancilio Silvia Espresso Machine implementing PID temperature control, and automated brewing cycles.

Planned Features:

• Web interface for displaying temperature and other statistics
• Brew temperature control
• Programmable machine warm-up/wake-up
• remote control of brew and steam switch
• automated start and warmup
• shot prep for next day
• automated maintenance
• external enclosure
• celcius instead of fahrenheit
• new webinterface served via flask

Dashboard

Hardware

• Raspberry Pi zero w

  • $17.74 - https://www.aliexpress.com/item/2017-Raspberry-Pi-Zero-W-Board-1GHz-CPU-512MB-RAM-with-WIFI-Bluetooth-RPI-0-W

• Power Adapter

  • Any Micro USB 5v / 2A supply will do, the longer the cable the better
  • $2.88 https://www.aliexpress.com/item/AC-110V-220V-TO-DC-5V-12V-24V-1A-2A-3A-5A-10A-15A-20A-30A/32836806697.html

• Micro SD Card

  • 4GB minimum, 8GB Class 10 recommended
  • $4.75 - https://www.aliexpress.com/item/SAMSUNG-32G-64G-128G-Memory-Card-Micro-SD-SDHC-SDXC-TF80M-Grade-EVO-Class-10-Micro/32610125064.html

• 4 channel 5v relay module

  • $ 4.10 https://www.aliexpress.com/item/DC5V-1-2-4-8-Channel-Relay-Module-with-Optocoupler-Relay-Output-1-2-4-8/32888878613.html

• Solid State Relay - For switching on and off the heating element

  • $3.4 - https://www.aliexpress.com/item/1pcs-SSR-40DA-40A-Solid-State-Relay-Module-3-32V-DC-Input-24-380VAC/32681597174.html?spm=a2g0s.9042311.0.0.27424c4d5PrdXp

• Thermocouple Amplifier - For interfacing between the Raspberry Pi and Thermocouple temperature probe

  • $2.35 - https://www.aliexpress.com/item/MAX31855K-Thermocouple-Sensor-Temperature-Detection-Module-Development-Board-Hot-sale/32805699868.html?spm=a2g0s.9042311.0.0.27424c4doR8tzF this one is not good, buying and testing a different one

• Type K Thermocouple - For accurate temperature measurement

  • $0.85 - https://www.aliexpress.com/item/Ring-type-Probe-Thermocouple-K-Temperature-Sensor-2M-Cable-for-Industrial-Temperature-Controller/32749486833.html

• female to female dupont line for connecting everything-

  • $0.65 - https://www.aliexpress.com/item/40PIN-Dupont-Line-10CM-20CM-30CM-Male-to-Male-Female-to-Male-and-Female-to-Female/32960712876.html

• cable sleeve 8mm diameter

  • $4.28 https://www.aliexpress.com/item/32875399483.html

• .75mm^2 wire - For connecting the A/C side of the relay to the circuit, rubber grommet and splicing connector, 3-conductor

• $5 - Hardware Store / Scrap

  • Don't skimp here. Remember this wire will be in close proximit to a ~240*F boiler

Hardware Installation

Installation Instructions / Pictures (my own version comming soon^tm)

Circuit Diagram

High-level circuit diagram:

Software

• OS - Raspbian https://www.raspberrypi.org/downloads/raspbian/

Install Raspbian and configure Wi-Fi and timezone.

silvia-pi Software Installation Instructions, will be updated

Execute on the pi bash shell:

sudo apt -y update
sudo apt -y install git build-essential python-dev python-smbus python-pip
sudo bash -c 'echo "dtparam=spi=on" >> /boot/config.txt' 
sudo reboot

After the reboot:

sudo git clone https://github.com/the-dbp/silvia-pi.git
cd silvia-pi
sudo ./setup.sh

This last step will make the virtual environment and download the necessariy python libraries and install the silvia-pi software in /root/silvia-pi~~