Acaia / Felicita Scale Gateway using the ArduinoBLE library for devices such as the esp32, arduino nano esp32, and arduino nano iot 33. This is an Arduino Library which can be found in the Arduino IDE Library Manager.
Tested on:
- Arduino Nano ESP32, Nano 33 IoT
- Acaia Pyxis, Acaia Lunar Pre-2021, Acaia Lunar 2021, Felicita Arc
- La Marzocco Linea Mini, La Marzocco GS3, Rancilio Silvia Pro
...using Arduino IDE 2.3.2 and ArduinoBLE 1.3.6
This library is intended to be used with any arduino device which is compatible with the ArduinoBLE library.
The included "shotStopper" example code uses the ShotStopper PCB to make it simple to control your espresso machine using the scale. Files are hosted on altium 365.
The following variables at the top of the shotStopper.ino file can be configured by the user:
MOMENTARY
- true for momentary switches such as GS3 AV, Rancilio Silvia Pro, Breville, etc.
- false for latching switches such as Linea Mini/Micra, etc.
REEDSWITCH
- true if a reed switch on the brew solenoid is being used to determine the brew state. This is typically not necessary so set to FALSE by default
You can find a demo on Youtube:
Firmware:
☑ Connect Acaia Pyxis to ESP32
☑ Tare Command
☑ Receive Weight Data
☑ shotStopper Espresso Machine Brew-By-Weight Firmware
☑ Compatibility with Lunar (Pre-2021)
☑ Compatibility with Lunar 2021
☑ Positive and negative weight support
☑ Latching-switch support (LM Mini, LM Micra, etc)
☑ Auto-reconnect
☑ change setpoint over bluetooth
☑ maintain setpoint and offset after powercycle
☑ auto start/stop timer
☑ flowrate-based shot end-time
⬜ auto timer reset
⬜ Improve Tare Command Reliability
Scale Compatibility:
☑ Acaia Pyxis
☑ Acaia Lunar
☑ Acaia Lunar (Pre-2021)
☑ Felicita Arc
Hardware:
☑ PCB Design for Low Voltage Switches (V1.1)
☑ 3D-Printed Half Case
☑ Compatibility with La Marzocco GS3 AV
☑ Compatibility with Rancilio Silvia Pro (and Pro X)
❌ Compatibility with La Marzocco Linea Classic S (Not Compatible, requires investigation)
☑ Compatibility with Stone Espresso (requires reed switch)
☑ Compatibility with La Marzocco Mini
☑ Powered by espresso machine (V2.0)
☑ Reed switch input (V2.0)
⬜ Compatibility with La Marzocco Micra (Presumed for V2.0)
⬜ Compatibility with Breville (presumed but untested)
⬜ Support for High-Voltage Switches (Hall-Effect Sensor and SSR?)
Sales:
☑ Beta Users Determined
☑ Beta Units Built
☑ Beta Units Shipped (2/22/24)
⬜ Beta Test Complete
⬜ Sales Open
- Tare command is less reliable than pressing the tare button.
- Only supports grams.
This is largely a basic port of the LunarGateway library written for the ESP32.
In addition to some minor notes from pyacaia library written for raspberryPI.
Felicita Arc support contributions from baettigp