Just finished these 16-segment character displays, currently driven by ESP8266 as 'network drivers' running Micropython to receive color information over MQTT from a Raspberry Pi, and then handing off the information over UART to Arduino 'display drivers'. The emergence of intermittent errors ( probably LmacRxBlk ) means we may be removing the wireless link and the ESP8266 elements in favour of RS485 though.
https://twitter.com/ShrimpingIt/status/ ... 6234809344