Open Source
This comes straight from Simple USB Terminal’s own GitHub page — it’s free. Need help installing? →
About this app
This is a plain text terminal for hardware you plug into your phone. Connect an Arduino, an ESP32, a micro:bit, a Pi Pico or any board with a serial port through a USB adapter, type a line, and read whatever it sends back — handy for checking sensor output or poking at a project when you have no laptop with you.
It knows the usual USB-to-serial chips (FTDI, Prolific PL2303, Silicon Labs CP210x, CH340 and CH341) as well as boards that speak USB CDC directly. A background service keeps collecting incoming data while you rotate the screen or switch apps, and it handles flow control, the control lines and sending a BREAK.
You will need a USB OTG cable. The app is deliberately a simplified version of the author's Play Store app, published so others can learn from and build on the code, so it is basic by design.
From the app’s home page
- See the codeHow it’s made — every line is public
- Questions & commentsTalk with the people who make it
- Report a problemTell the makers something is broken
- All versionsOlder downloads and what changed
- LicenseThe rules for using and sharing it
More like this
All Tools →
Simple Bluetooth Terminal
Send and receive text over classic Bluetooth
EtchDroid
Write a Linux install image to a USB stick from your phone
Ventoid
Make a bootable USB stick from your phone
Rufid
Make a bootable USB stick straight from your phone
ConnectBot
The original SSH client for Android
Unexpected Keyboard
A tiny keyboard with hidden extra keys