Can the Arduino Uno be used as a USB to UART bridge?

Question

Arduino

Can the Arduino Uno be used as a USB to UART bridge? I want to restore a bricked router.

Answer 1

If you only need the RxD and TxD lines, then you can do it without any problems.
https://web.archive.org/web/20110207183541/http://...
In fact, all you need is to upload a sketch to block the UART on the arduino microcontroller and connect the target device to the GND, RxD, TxD lines. Don't forget that the RxD of the arduino is connected to the TxD of your router, and the RxD of the router is connected to the TxD of the arduino.

Answer 2

you can close the reset with the ground. This is how I restored the MR3020 - everything works fine