Here is an example using a PiicoDev Ultrasonic sensor with NodeRED on a RPi Zero 2 W, without bridging via Python scripts and MQTT. There might be something useful here for other NodeRED users who want to play with PiicoDev “natively”.
There were a few other OS-level tweaks I did to the Zero to get it running smoothly. (Preventing wlan0 from sleeping, etc.) I’ll try to dig up my notes on those and add it to the GitHub page.