RP2040 PIO serial port, created for the VT2040 terminal. Intended for communicating with an ESP8266 running Retro WiFi Modem, MicroPython, CP/M, or other firmware that communicates via serial.
- Can use any GPIO pins for TX and RX
- 115200 8N1, compatible with most ESP8266 firmwares
- Ignores ESP8266 boot messages
- 4kB receive buffer (configurable)
