This is a Micropython + LVGL project that aims to provide an electronic shopping list that integrates to Grocy. It's designed to run on an M5Stack Core2 board with the Faces QWERTY I2C keyboard and a joiny thinger.
It should run on other ESP32-based hardware with suitable modification. Do yourself a favour and get something with some PSRAM though.
On 2021-08-09 I was informed by the manufacturer that they are planning to end-of-line the FACES range. Bummer!
https://www.youtube.com/playlist?list=PLT7ckgz8vcoZQXg738lWLX3vyoRwWtYmF
Use M5Burner (Closed source software! Boo! Hiss!) to write the latest version of the UIFlow firmware to your device.
Since you can't really trust software you can't build yourself, I recommend blocking the MAC address of your device in your router such that it cannot contact the internet. It's what I did.
You may like to use the write.py script to help with flashing things to your device directly via serial. It uses ampy under the hood.
Create a secrets.py and include that on your device, along with everything in the src directory.
ssid = 'myverysecretssid'
password = 'myequallysecretpassword'
grocy_api_key = 'beansbeansbeansbeansbeansbeansbeans'
grocy_domain = 'http://192.168.1.100:3000'