This is a Home Automation Smart Coffee Machine Addon. Easy installation on any home or office coffee machine. The PCB uses an ESP32 S3 packed with Bluetooth, BLE and WiFi ready to be programmed for Home Assistant!

This Addon Enables any vintage coffee machine to be connected to the internet (or only to a personal network). Can connect with any Computer, Mobile App or Home Assistant (home automaton).

Functionalities available:

• Control water temperature;
• Low water detection in the water tank;
• Order a cup of coffee (with possibility control of quantity of coffee in the cup);
• Grind coffee beans.;
• Connect to a Nextion LCD Touch ;
• RGB LED;
• Magnetic Buzzer;
• This PCB can be powered using 220V AC or regular 5V DC.
• The coffee machine is controlled using 220V relays or alternatively any other 3.3V switch.

To all those looking for LCD touch solutions, this PCB features a connection to NEXTION LCD panels so one car order a cup of coffee using the LCD Touch.

Great to do a restoration with this smart PCB add-on on any vintage coffee machine.

Smart PCB Hardware Specifications

The hardware specifications for the 12bit PCB with dimensions of 54x48mm are the following:

• QFN 56 Dual Xtensa LX7 Core Processors running up to 240MHz
• RISC V ultra-low power co-processor
• 512Kb RAM;
• 8Mb SOIC 8 NOR SPI Flash Memory;

• 2.4GHz ISM wireless connectivity;

• Authentication & Security:

• SOIC-8 ATSHA204A SHA-256 high-security hardware authentication IC for secure and unique communication between devices;
• Power management
• DFN-6 AUR9718 high efficiency step-down 3.3V 1.5A DC converter;

• 100-220V AC 5W to 5V 1A DC Power supply Transformer with Filtering and fuse

• Onboard sensors:

• DFN-8 SHT3.x; temperature sensor with a precision of 1.5C;
• DFN-8 SHT3.x humidity sensor;

• LGA-14 LSM6DS3 a 6-axis accelerometer and gyroscope;

• External connectivity:

• 2x temperature sensors
• 1x water level sensor
• 1x coffee grinder Switch (3.3V) able to connect to a 220V AC relay
• 1x water heater Switch (3.3V) able to connect to a 220V AC relay
• 1x coffee maker Switch (3.3V) able to connect to a 220V AC relay
• 4-pin UART connection for Nextion HMI LCD Touch Displays.

Compatibility

• Google Home Assistant
• Apple Home
• Matter / Zigbee
• Hone Assistant

and all others compatible with the LX7 microprocessor from Tensilica.

What's included

• A smart device PCB electronics for retrofitting any new or vintage coffee machine
• Lifetime firmware support on GitHub.

What's not included

• The rubber duck
• the clay mug