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Joseph Timothy Foley
2026-07-02 09:33:56 +00:00
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# Gadget Mode to setup a serial connection over USB # Gadget Mode to setup a serial connection over USB
Prepare Raspberry Pi OS connection over a microUSB serial cable Prepare Raspberry Pi OS connection over a microUSB serial cable
Important: You will want to disable the serial console on RX/TX if you are trying to use that serial port for communicating with other devices.
Based upon Adafruit guide: https://learn.adafruit.com/turning-your-raspberry-pi-zero-into-a-usb-gadget/serial-gadget: Based upon Adafruit guide: https://learn.adafruit.com/turning-your-raspberry-pi-zero-into-a-usb-gadget/serial-gadget:
The author discovered the guide was out of date, consulted the [2025 Raspberry Pi whitepaper on OTG](https://pip-assets.raspberrypi.com/categories/685-app-notes-guides-whitepapers/documents/RP-009276-WP/Using-OTG-mode-on-Raspberry-Pi-SBCs), found additional errors, and was finally able to correct them thanks to this blog https://www.isticktoit.net/?p=1383 The author discovered the guide was out of date, consulted the [2025 Raspberry Pi whitepaper on OTG](https://pip-assets.raspberrypi.com/categories/685-app-notes-guides-whitepapers/documents/RP-009276-WP/Using-OTG-mode-on-Raspberry-Pi-SBCs), found additional errors, and was finally able to correct them thanks to this blog https://www.isticktoit.net/?p=1383
## Important :
- **Using the Gadget Mode will make the usb port unable to connect to a mouse or keyboard!!!** You will need to disable it make them work again.
- You will want to disable the serial console on RX/TX in `raspi-config` if you are trying to use that serial port for communicating with other devices.
## Procedure
Make sure you have your USB cable plugged into the left port **USB** and not the right port marked **PWR**. Make sure you have your USB cable plugged into the left port **USB** and not the right port marked **PWR**.
1. Open a connection to the device via ssh or Raspberry Pi Connect 1. Open a connection to the device via ssh or Raspberry Pi Connect
1. Become root (the superuser) 1. Become root (the superuser)