UsbTerminal

Terminal emulator for serial devices connected with USB

UsbTerminal is a terminal emulator (sometimes called "monitor"). It is intended to be used with a physical connection to the device
via the phone or tablet’s USB port.
The phone or tablet must support USB-Host Mode a.k.a USB On-The-Go (USB-OTG),
and a USB-OTG cable is required.
Typical use-cases for this app are:
● Controlling an IoT device like an Arduino, ESP32, etc
● Controlling a communication device such as a router that has a serial console connector (this may require a USB to RS232 converter cable)

UsbTerminal is open-source. See https://github.com/liorhass/UsbTerminal

Features:
● Support devices with the following USB to Serial protocols/chips: CDC-ACM (e.g. Arduino Uno R3), FTDI (FT232R, FT232H, FT2232H, FT4232H,
FT230X, FT231X, FT234XD), Prolific PL2303, CH34x, Silabs CP210x (e.g. ESP32 dev boards from Espressif)
● Support two keyboard input modes:
1. Auto - Like on a “real” terminal, there is no dedicated input field. Characters are sent to the serial device immediately as keys are clicked on the keyboard. This is the default mode.
2. Dedicated input field - Keyboard input goes to a dedicated input field and is sent to the device only after a “Send” button is pressed.
● Partial support of ANSI/VT100 escape sequences including text coloring
● Two display modes: Text and Hex
● Background communication - the app can maintain connection and
continue receiving data even when it is in the background
● Log sessions to files. These log files can then be viewed or shared in
order to be analyzed with external tools
● Sending control character (e.g. Ctrl-C)
● Controlling of DTR and CTS
● Large scroll-back buffer
● Blinking cursor
● Status line indicating connection state, error messages, screen size,
cursor location and display mode
● Built-in help
● Built-in shortcuts to reset an Arduino and ESP32 dev boards
● No root required
● No special permissions required

A note to Arduino users:
One advantage of UsbTerminal is the way it handles DTR. Typically when an Arduino board is connected to a PC, it will reboot every time a terminal emulator application is connected to it. This is because the PC drops the DTR signal low whenever a connection is formed, and Arduino is designed to reset when DTR line is dropped low. UsbTerminal on the other hand, doesn’t automatically