USB Serial Terminal Pro APK

Version 2.1 -
Last updated: Sun, 27 Sep 2020 1:13:04 UTC

APP Information

Download Version 2.1 (43)
Apk Size384.89 KB
App Developerhosun lim
Malware CheckTRUSTED
Install on Android3.1 and up

Download USB Serial Terminal Pro 2.1 APK

App Description

USB Serial Terminal Pro is oneman,tools,serial,term, content rating is Everyone (PEGI-3). This app is rated 5 by 1 users who are using this app. To know more about the company/developer, visit hosun lim website who developed it. apps can be downloaded and installed on Android 3.1 and higher Android devices. The Latest Version of 2.1 Available for download. Download the app using your favorite browser and click Install to install the application. Please note that we provide both basic and pure APK files and faster download speeds than APK Mirror. This app APK has been downloaded 623+ times on store. You can also download APK and run it with the popular Android Emulators.

Smart phones serial terminal program. USB equipment using SilLab CP210X, FTDI FT232 and Prolific PL2303, CDC/ACM UART to USB Bridge chips can be used to connect to your smart phone.

Zigbee Chip TI CC2531 can be used also. Provides the same functionality and the PC for serial communication terminal

- Supported chip: Silicon Laboratories(CP210X), FTDI(FT232), Prolific(PL2303)


- Supported phones: USB host support smart phones (Samsung galaxy2/galaxy 3/galaxy note / galaxy note2/Vega racer R3)

- Supported Android version: Android version 3.1 (API Level 12)

0. Quick Start

1) Please use the OTG cable to connect the usb device on your smart phone.

2) smart phone detect usb device, and then asks whether to run. Click OK to run the App.

3) Click the Settings button (wrench icon) of upper right corner in order to set serial communication.

4) Click the Save button.

5) Click the Connect button (phone icon) of upper right corner in order to connect to the device.

1. Main UI

- ASCII: Print received data as a ascii string.

- HEX: Print received data as a hexadecimal string.

- BIN: Print received data as a binary string.

- Connect Button(Phone icon):, connect to USB device. After connection this icon changed to close icon.

- Settings Button(Wrench icon): Serial communication setting window will open

- Upper(RX) CR, LF: Line separator configuration. process device to local system line separator conversion for received data before print text area

- Modem status buttons: show CTS, DSR, CD, RI pin status

- USB device description: USB device’s description window will open

- Clear received data:: Trash icon, clear all received data in text area

- Received data text area: print received data

- DTR/RTS button: control modem DTR/RTS status

- Lower(TX) CR/LF: Append line separator characters to transfer data

- Transfer(TX) Text input field: Enter the data(string, decimal, hexadecimal, binary) you want to transfer.

Transfer data is entered as a string by default.

Binary data is entered as shown below, you can enter in hex or binary or decimal

Decimal: @ +숫자 3-digit(0~255) ex) CR: @013

Hex:  # + 2-digit hex, ex) CR: #0D

Binary:  & + 8-digit binary, ex) CR: &00001101

※Escape @, #, &: insert twice in succession in order to send @, #, &

- Send Button(Right arrow icon): Transfer input data to USB device

- Macro buttons 1 ~ 7: Set macro(had entered the frequently used data in advance) to transfer text field

- Macro Edit Button(Pencil icon): Macro edit window will open 

2. Menu

- Serial communication settings: Baud rate, Data bits, Parity, Stop bits, Handshaking Mode setting supported.

  Select enable file logging for logging received data in the external storage path "[External Storage Root]/USBTerminal/RAW_YYMMDD_hhmmss.log".

- USB Descriptions: USB equipment specification window will open.

- Macro edit: edit transfer data macro that frequently used. 

Macros can register up to seven.

- ASCII table: ASCII Code table. 

ASCII code inserted to text field When you select a code, 

and the window is closed, the inserted codes appended to tx text field

- Send Break:  send long break

- Save Console Log: save current console content to the external storage path "[External Storage Root]/USBTerminal/CONSOLE_YYMMDD_hhmmss.log".

- Share Log File: share a saved log file to bluetooth, cloud services, email, ...

3. FAQ

Q: Why my smart phone detect usb device?

A: Smartphones make sure it supports the USB Host.

In addition, the Android version 3.1 (API Level 12) from the USB Host support.

Occasionally on the smartphone does not recognize USB devices (eg Galaxy Note 1). Smartphone otg cable to connect to leave only the part that is connected to the equipment by unplugging and re-connect if you recognize that this case is.

Q: After installing your app, my another app that uses USB OTG stopped working.

A: Android won't re-recognize the device attached unless the OTG cable is physically removed and re-attached. (Thanks to Aki Niimura)


App ChangeLog

  • support CH43X/HL-340 Chip set

App Screens

USB Serial Terminal Pro App Screen 1USB Serial Terminal Pro App Screen 2USB Serial Terminal Pro App Screen 3USB Serial Terminal Pro App Screen 4USB Serial Terminal Pro App Screen 5USB Serial Terminal Pro App Screen 6USB Serial Terminal Pro App Screen 7USB Serial Terminal Pro App Screen 8


Apk scan results

Apk Scaned By TotalVirus Antivirus, Was Pure And Safe.

Scan Stats:confirmed-timeout:0|failure:0|harmless:0|malicious:0|suspicious:0|timeout:0|type-unsupported:0|undetected:57|
File type:Android
Magic:Zip archive data, at least v2.0 to extract
File size:394128
Uncompressed Size:1763784
Contained Files	:85
Contained Files By Type:CIA:1,MF:1,RSA:1,SF:1,dex:1,gif:1,png:55,xml:22,


requires following permissions on your android device.

android.permission.WRITE_EXTERNAL_STORAGE: Allows an application to write to the SD card.
modify or delete the contents of your SD card
Allows the app to write to the SD card.


Certificate Issuer:C=kr, ST=Daejeon, L=Yuseong-gu, O=OneMan, OU=Dev., CN="Ho-sun, Lim"
Certificate Subject:C=kr, ST=Daejeon, L=Yuseong-gu, O=OneMan, OU=Dev., CN="Ho-sun, Lim"


Older Versions

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Google Play Reviews

  1. Owen Duffy-avatar

    Owen Duffy


    Doesnt work with some cp210x.

  2. Emrah Ali PEKDEMİR-avatar

    Emrah Ali PEKDEMİR


    This is my favourite USB serial terminal app. Very handy for embedded systems enthusiasts. A short will crash the program, so be careful :)

  3. A Google user-avatar

    A Google user


    Sending a BREAK does not work with my Prolific PL2303 usb to serial cable. It's not a problem with cable as the cable works when used with a Windows 10 PC.

  4. vamsidhar reddy-avatar

    vamsidhar reddy


    Working flawlessly with cp2102 and note 3

  5. Fu Ming Jeh-avatar

    Fu Ming Jeh


    Working,that's the different.

  6. Ilia Motornyi-avatar

    Ilia Motornyi


    Tested on asus fonetab7, asus zenfone4, teclast p88, pl2302 adapter.

  7. Pasan Karunanayake-avatar

    Pasan Karunanayake


    Working flawlessly on my Galaxy Note 2. Tested CP2102 and PL2303.

  8. A Google user-avatar

    A Google user


    Thanks for ft232 update

  9. Thomas Dwyer-avatar

    Thomas Dwyer


    Samsung Galaxy S4 CyanogenMod 10.1.4 Stable Sprint Works with my $3 USB to 9 Pin RS-232 aka. The kind that attach to a Cisco Router or Switch.

  10. Kai Gunter Brandt-avatar

    Kai Gunter Brandt


    Great tool

  11. David Schofield-avatar

    David Schofield


    I think I tried every serial port terminal program here on Google Play Store and this is the only one that worked for me! The user interface could use some work, but I was really happy that it worked at all. I have a Prolific PL 2303 serial adapter and am using it with my Toshiba Thrive. It had no problem talking to my Omega temperature controller. As a result, I'm buying this program!