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 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.

would be awesome if it supported ANSI escape sequences!

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

1.57 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
1.54 2024-06-02
NEW disable send button if send takes more than 0.2sec
FIX sending large data at very low baud rate caused 'connection lost'
FIX reduce CPU/battery usage when control lines are shown
1.53 2024-01-12
FIX improved notification enabling