The Serial Wombat 18AB chip is coming

18 I/O pins. Selectable I2C Address. Capacitive Touch. 12-Bit A/D conversion. WS2812 Support. Direct Resistance Measurement. TM1637 support. Control via UART. Two I2C to UART Bridges in hardware, plus additional in software. On-Board low-accuracy temperature sensor. Uses the same Arduino library as the SW4B chip. Look for it in early 2022.