Train Station Clocks

The clocks in the space. See also Nottingham Hackspace's wiki:

https://wiki.nottinghack.org.uk/wiki/BigClocks

Clock information

• Dimensions: 96 × 26
• Operating voltage: 3.3V
• Power voltage: 5V

Hardware driver

The microcontroller is a XIAO Studio Seeed ESP32C3.

Pinout

See kicad project for the latest version.

Prototype

Running the project

Installation

$ pio run -t clean -t upload -e server

Generation of compatible image data

$ ./icons/image2bytes.py ./icons/skull.gif

Setting the status of the display

$ curl http://ip_address:port/ --data '{
  text: "Repair cafe @\nSheffield Hackspace",
  text_wrap: false,
  flash: false,
  invert: false,
  horizontal_align: 0,
  vertical_align: 0,
  image: "AAAAAAAAAAAAAAAAAAAADAAwHAA4Hn54Bv9gAf+AATyAATyAAeeAAeeAAH4AA0LAD37wDjxwBgBgAAAAAAAAAAAAAAAAAAAA",
  image_width: 24,
  image_height: 24
}'

• text - The text to be displayed. If it is too long, the display will scroll the text accordingly.
• text_wrap - Should the text be wrapped or not. If true, the overflow will be scrolled vertially; if false, horizontally.
• flash - Set true to invert the colours every second producing a flashing animation
• invert - Invert the colours of the display
• horizontal_align - -1 left, 0 centre, 1 right
• vertical_align - -1 top, 0 centre, 1 bottom
• image - base64 of an image (output of the other script)
• image_width - image width
• image_height - image height

Included libraries

• Based on the BigClock library made by the Nottingham Hackspace
• Adafruit_BigClock provides an Adafruit_GFX compatible driver for the display
• Adafruit_Widget provides an interface for displaying information

The BigClock library has been heavily rewritten by dredzik.