UART-to-TTL adapter
Last updated
Last updated
A UART-to-TTL adapter is used to interface with UART communication ports, commonly found in embedded systems, by converting TTL (3.3V or 5V) signals to USB for interaction with a computer. The UART protocol uses three key pins: TX (Transmit), RX (Receive), and GND (Ground). The TX pin sends data from the device, RX receives data, and GND ensures a common reference for signal integrity. Correctly matching voltage levels (3.3V or 5V) between the adapter and the target device is crucial to prevent damage during communication.
Open your serial terminal software and configure the following settings:
Baud Rate: Most popular values are 9600 and 115200, or as specified in the device’s documentation (picocom also has a feature to adjust the baud rate on the fly (check docs)).
more common baud rates: 4800, 19200, 38400, 57600, 230400, 460800, 921600
There are more settings you have to figure out, but the most common ones are these:
Data Bits: 8
Parity: None
Stop Bits: 1
Flow Control: None
UART-TTL adapter are usually pretty cheap ($10) and compact like this model:
Hint:
If you console looks like this, you probably have the wrong baud rate set:
https://www.seeedstudio.com/blog/2019/12/11/rs232-vs-ttl-beginner-guide-to-serial-communication/