Interfacing (DSI, CSI, I2C, etc.) • Re: USB interface between PC and Pi zero 2 w

Is there a way to use the micro USB port (not the power one) as a Serial or something similar?

Yes. As long as you don't need the zero2w to be a USB host at the same time.

This assumes RPiOS.

1. Locate you config.txt and cmdline.txt. On Bookworm look in /boot/firmware. On Bullseye and earlier look in /boot
2. Add the following to the end of config.txt:

   Code:

   dtoverlay=dwc2

3. Add the following to the end of cmdline.txt:

   Code:

    modules-load=g_serial

4. Reboot

The Pi will now have a /dev/ttyGS0 serial port and your USB host should detect a serial device.

There are also the ethernet gadget, the mass storage gadget, and others. Loading g_cdc will give both a serial port and an ethernet interface.

One word of caution: The +5v pins in both micor USB sockets and the GPIO header are directly connected together so if you connect the data port to a USB host and the power port to a PSU there will be a conflict and one supply will try to feed into the other.

Statistics: Posted by MessierW — Mon Feb 12, 2024 1:35 pm