Serial USB Terminal

Kai Morich

In-app purchases

About this app

'Serial USB Terminal' is a line-oriented terminal / console app for microcontrollers, arduinos and other devices with a serial / UART interface connected with a USB to serial converter to your android device.

This app supports USB to serial converters based on
- FTDI FT232, FT2232, ...
- Prolific PL2303
- Silabs CP2102, CP2105, ...
- Qinheng CH340, CH341
and devices implementing the USB CDC protocol like
- Arduino using ATmega32U4
- Digispark using V-USB software USB
- BBC micro:bit using ARM mbed DAPLink firmware

To connect USB to serial converters, your android device must support USB OTG aka. USB host mode. Most devices support this today, but in case of issues check with one of the various USB test apps, if host mode is enabled in your android kernel.

All features in this app are free. In-App purchase is only used for the 'Donate' option.

Looking for source code? Here you find a simplified variant of this app:
https://github.com/kai-morich/SimpleUsbTerminal

Ratings and reviews

I got this to connect to an arduino uno. It works great. If it was possible to easily clear the keyboard input line before sending the next line of text, that would make it perfect. {edit 26 Dec 2025} Many thanks for the clarification - all is well. Kind regards

I tried so many serial apps and this was by far the best. I wish that it auto detected my serial port and it doesn't work with the HP network switch's help function. However, it did really well at displaying the terminal properly and allowing me to enter the command I needed. I guess I need to stop relying on the help menus so much.

Liked it so much I bought with a smile. Connects to my Prolific 2303 and CH340s cleanly which means I don't have to carry my laptop to every service call. Customers are amazed to see me arrive with just a small tool kit and plug in my P20 and talk to their systems. To make it perfect, needs Xmodem file transfer and VT100 terminal emulation (at least the cursor control and erasing subset). If it gets this I can do firmware downloads to! It has to get 6 stars then - I'd even buy it again!!! ;-)

What’s new

1.58 2026-05-01
NEW macros w/o newline
NEW hex macros with delay
1.57 2025-11-07
FIX copy from main text view with unmodified spaces
INFO Android 5.0 as minimum version
1.56 2025-03-17
FIX single CR handling for newline CR+LF setting
1.55 2024-07-21
NEW flow control for FTDI, PL2303, CP210x