WORK IN PROGRESS
This project is a work in progress. The goal is to create a smart espresso machine using a Raspberry Pi 4 and few sensors to monitor the pressure of the water in the boiler and in the head of the machine. The pressure sensors are connected to a MCP3008 ADC and the Raspberry Pi is connected to a Home Assistant instance to monitor the pressure.
| Items | Description | Link | Notes |
|---|---|---|---|
| 1 | Raspberry Pi 4 Model B 2GB RAM | ||
| 1 | MCP3008-I/P MCP3008 DIP-16 | https://a.aliexpress.com/_olcJc4g | |
| 2 | Pneumatic Plumbing Brass Pipe Fitting Male/Female Thread 1/8" 1/4" 3/8" 1/2" BSP Tee Type Copper Fittings Water Oil Gas Adapter | https://a.aliexpress.com/_okOIGjW | Choose the F-F-M 1/8" |
| 1 | Water Oil Fuel Gas Air Pressure Sensor Transducer (PT1/4 G1/2 G1/8) 5-12V 0.5-4.5V 0-300Bar Gauge Optional Consumer Electronics | https://a.aliexpress.com/_omToNFi | Choose the 0-0.5Mpa G1-8 and write to the seller that you need the 3.3v version |
| 1 | Water Oil Fuel Gas Air Pressure Sensor Transducer (PT1/4 G1/2 G1/8) 5-12V 0.5-4.5V 0-300Bar Gauge Optional Consumer Electronics | https://a.aliexpress.com/_omToNFi | Choose the 0-2Mpa G1-8 and write to the seller that you need the 3.3v version |
| 1 | 60 Values 1/4W 1％ Metal Film Resistors Kit 300Pcs 1 ohm - 4.7M ohm 1/4 Watt W High Precision MF Resistance Set Assortment | https://a.aliexpress.com/_oBZ1yNa | |
| 1 | 530pcs/Set Polyolefin Shrinking Assorted Heat Shrink Tube Wire Cable Insulated Sleeving Tubing Set 2:1 Waterproof Pipe Sleeve | https://a.aliexpress.com/_okRXZ5m | |
| 1 | DIY Prototype Raspberry Pi Expansion Board PCB Shield Compatible for Raspberry Pi 4B/3B/3B Board For DIY Starter Projects | https://a.aliexpress.com/_opgseK8 | |
| 1 | 1.3" OLED Display Module White/Blue Color Drive Chip SH1106 128X64 1.3 inch OLED LCD LED IIC I2C Communicate For ArduinoProjects | https://a.aliexpress.com/_oEzEfpA | Nice but too small |
- Soldering iron
- Soldering wire
- Multimeter
- Ratchet wrench
- Screwdriver
- Teflon tape
| RaspberryPi | SH1106 |
|---|---|
| Pin 6 (GND) | Pin 1 (GND) |
| Pin 1 (3.3V) | Pin 2 (VCC) |
| Pin 5 (SCL1) | Pin 3 (SCL) |
| Pin 3 (SDA1) | Pin 4 (SDA) |
| RaspberryPi | MCP3008 |
|---|---|
| Pin 1 (3.3V) | Pin 16 (VDD) |
| Pin 1 (3.3V) | Pin 15 (VREF) |
| Pin 6 (GND) | Pin 14 (AGND) |
| Pin 23 (SCLK) | Pin 13 (CLK) |
| Pin 21 (MISO) | Pin 12 (DOUT) |
| Pin 19 (MOSI) | Pin 11 (DIN) |
| Pin 24 (CE0) | Pin 10 (CS/SHDN) |
| Pin 6 (GND) | Pin 9 (DGND) |
sudo raspi-configSelect "Interfacing Options" and then "SPI" and enable it.
sudo apt-get install python3-dev python3-pip
pip3 install smart-esppresso| Key | Description |
|---|---|
| analog_devices | List of analog devices (PressureAnalogSensor) |
| client_ha | Home Assistant Client |
| display | luma oled device |
This example is a simple script that reads the pressure from 2 pressure sensors, displays it on the OLED display and sync data with Home-assistant.