For all the Ethernet implementations, there is support for the 0.96 inch OLED Display 128X64 I2C SSD1306 and 2-digits 7-segment based on the MCP23017.
Please note that the 2-digits 7-segment display is a common-anode type. And the MCP23017 pin 15 (A0) must be connected to VDD.
Eagle files for a 2-digits 7-segment board: https://github.com/vanvught/h3dmx512-zip/tree/master/eagle/Orange-Pi-Zero/7segment
The status messages are defined here: https://github.com/vanvught/rpidmx512/blob/master/lib-display/include/display7segment.h#L35