This is a self-contained LED matrix display that can display any custom text message you wish.
When powered on, the device acts as an open WiFi access point that you can connect to with any modern device. The device will behave like a captive portal and direct you to a web page where you may enter your custom message. Just click the Submit button and your message should immediately begin scrolling on the device.
Main Parts List:
- 8x32 MAX7219 LED Matrix Array
- D1 Mini ESP8266 WiFi Module
- TP4056 Lithium Battery Charger Module
- DC-DC Boost Converter Module 5V
- Lithium Battery
- Slide Switch
Of course you will need wire, 4 small tapping screw and a method to mount everything inside the case.
For other project details see https://github.com/joewez/WifiMarquee
When you slice the model make sure you get enough of cover for the LEDs, yet not too much that it blocks too much of the LED light. I found that two layers of 0.15 mm (or 0.3 mm) was about thick enough for my brand of white filament.