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

Absolutely genious app. From now, I can copy CNC machine's parameters without any laptop. Tested. Working smoothly and precisely. May be later I will ask author for one special feature, but time will show is it needs to be added, or I will find it inside the app. P.S. It will be nice to run "loop" test, while checking adapter with loopback connected, in one click. And to observe looped signals as "got / failed."

Near perfect solution. Need to integrate software keyboard input like Termux's, especially when dealing with network switches and routers command line completions. Inserting ? and Tab via macros doesn't really work. Scrolling through historical commands would be an awesome addition.

Best Serial terminal so far, working perfectly in any aspect, but I would add a few more Font type, and to be able to change the terminals background and foreground color, then it would be 100% perfect! 😉☕

What’s new

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
1.52 2024-01-09
NEW added "Settings > Misc. > Show notification when connected" because not shown in notification bar by default on Android 14