Serial USB Terminal

Version: 1.56 Updated: March 19, 2025 Android 4.3+ 8.6 206

Download Latest APK 2.18 MB Google Play

Description

'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

More Information

Package Name: de.kai_morich.serial_usb_terminal

Category: Tools Apps

Update Date: 2025-03-19

Latest Version: 1.56

Available on: Google Play

Requirements: Android 4.3+

Version: v1.56

Previous Versions

Variant	Arch	Android	DPI	Size	Action
101	N/A	Android 4.3+	160-640dpi	2.18 MB	Download APK
100	N/A	Android 4.3+	160-640dpi	2.18 MB	Download APK

What's New:

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

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	2.17 MB	Download APK

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

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	2.17 MB	Download APK

What's New:

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
FIX Android 14 USB permission dialog response handling

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	2.47 MB	Download APK

What's New:

1.53 2024-01-12
FIX improved notification enabling
1.52 2024-01-09
NEW "Settings > Misc. > Show notification when connected" because not shown in notification bar by default on Android 14
FIX Android 14 USB permission dialog response handling
1.51 2023-12-17
FIX Android 14 USB permission dialog
1.50 2023-11-25
FIX improved composite CDC devices support
1.49 2023-06-18
NEW show active logging in toolbar
1.48 2023-05-01
NEW macros with repeat option

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	2.47 MB	Download APK

What's New:

1.52 2024-01-09
NEW "Settings > Misc. > Show notification when connected" because not shown in notification bar by default on Android 14
FIX Android 14 USB permission dialog response handling
1.51 2023-12-17
FIX Android 14 USB permission dialog
1.50 2023-11-25
FIX improved composite CDC devices support
1.49 2023-06-18
NEW show active logging in toolbar
1.48 2023-05-01
NEW macros with repeat option

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	2.47 MB	Download APK

What's New:

1.51 2023-12-17
FIX Android 14 USB permission dialog
1.50 2023-11-25
FIX improved composite CDC devices support
1.49 2023-06-18
NEW show active logging in toolbar
1.48 2023-05-01
NEW macros with repeat option
1.47 2023-03-11
NEW detect CDC devices by USB interface types instead of fixed VID+PID -> no more driver selection required for standard CDC devices

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	2.47 MB	Download APK

What's New:

1.50 2023-11-25
FIX improved composite CDC devices support
1.49 2023-06-18
NEW show active logging in toolbar
1.48 2023-05-01
NEW macros with repeat option
1.47 2023-03-11
NEW detect CDC devices by USB interface types instead of fixed VID+PID -> no more driver selection required for standard CDC devices
1.46 2022-07-31
NEW timestamp format with date
NEW smaller font size configurable
FIX spacing for HEX display mode
FIX PL2303G detection

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	2.38 MB	Download APK

What's New:

1.49 2023-06-18
NEW show active logging in toolbar
1.48 2023-05-01
NEW macros with repeat option
1.47 2023-03-11
NEW detect CDC devices by USB interface types instead of fixed VID+PID -> no more driver selection required for standard CDC devices
1.46 2022-07-31
NEW timestamp format with date
NEW smaller font size configurable
FIX spacing for HEX display mode
FIX PL2303G detection
1.45 2022-04-12
FIX crash on Android 12 at Settings->Misc->Save+log folder

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	2.49 MB	Download APK

What's New:

1.48 2023-05-01
NEW macros with repeat option
1.47 2023-03-11
NEW detect CDC devices by USB interface types instead of fixed VID+PID -> no more driver selection required for standard CDC devices
1.46 2022-07-31
NEW timestamp format with date
NEW smaller font size configurable
FIX spacing for HEX display mode
FIX PL2303G detection
1.45 2022-04-12
FIX crash on Android 12 at Settings->Misc->Save+log folder

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	2.43 MB	Download APK

What's New:

1.47 2023-03-11
NEW detect CDC devices by USB interface types instead of fixed VID+PID -> no more driver selection required for standard CDC devices
1.46 2022-07-31
NEW timestamp format with date
NEW smaller font size configurable
FIX spacing for HEX display mode
FIX PL2303G detection
1.45 2022-04-12
FIX crash on Android 12 at Settings->Misc->Save+log folder
1.44 2021-09-24
FIX double send with external keyboard
FIX some PL2303G product IDs

Variant	Arch	Android	DPI	Size	Action
80	N/A	Android 4.3+	160-640dpi	2.23 MB	Download APK
80	N/A	Android 4.3+	160-640dpi	2.23 MB	Download APK

What's New:

1.46 2022-07-31
NEW timestamp format with date
NEW smaller font size configurable
FIX spacing for HEX display mode
FIX PL2303G detection
1.45 2022-04-12
FIX crash on Android 12 at Settings->Misc->Save+log folder
1.44 2021-09-24
FIX double send with external keyboard
FIX some PL2303G product IDs
1.43 2021-05-16
NEW support PL2303GC/GB/GT/GL/GE/GS
NEW custom baud rates for PL2303TA/TB
1.42 2021-03-07
FIX crash in control line display

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.42 MB	Download APK

What's New:

1.45 2022-04-12
FIX crash on Android 12 at Settings->Misc->Save+log folder
1.44 2021-09-24
FIX double send with external keyboard
FIX some PL2303G product IDs
1.43 2021-05-16
NEW support PL2303GC/GB/GT/GL/GE/GS
NEW custom baud rates for PL2303TA/TB
1.42 2021-03-07
FIX crash in control line display
1.41 2021-03-05
FIX more responsive UI when reading a lot of data or when resuming from background with a lot of new data
FIX file upload in raw mode + character delay

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.42 MB	Download APK

What's New:

1.44 2021-09-24
FIX double send with external keyboard
FIX some PL2303G product IDs
1.43 2021-05-16
NEW support PL2303GC/GB/GT/GL/GE/GS
NEW custom baud rates for PL2303TA/TB
1.42 2021-03-07
FIX crash in control line display
1.41 2021-03-05
FIX more responsive UI when reading a lot of data or when resuming from background with a lot of new data
FIX file upload in raw mode + character delay
1.40 2021-01-03
NEW send BREAK signal

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.43 MB	Download APK

What's New:

1.43 2021-05-16
NEW support PL2303GC/GB/GT/GL/GE/GS
NEW custom baud rates for PL2303TA/TB
1.42 2021-03-07
FIX crash in control line display
1.41 2021-03-05
FIX more responsive UI when reading a lot of data or when resuming from background with a lot of new data
FIX file upload in raw mode + character delay
1.40 2021-01-03
NEW send BREAK signal

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.49 MB	Download APK

What's New:

1.42 2021-03-07
FIX crash in control line display
1.41 2021-03-05
FIX more responsive UI when reading a lot of data or when resuming from background with a lot of new data
FIX file upload in raw mode + character delay
1.40 2021-01-03
NEW send BREAK signal
NEW show hints again with Settings->Misc->Hints
FIX discard old data exceeding buffer size already in background service to avoid high memory usage when doing long term logging

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.49 MB	Download APK

What's New:

1.41 2021-03-05
FIX more responsive UI when reading a lot of data or when resuming from background with a lot of new data
FIX file upload in raw mode + character delay
1.40 2021-01-03
NEW send BREAK signal
NEW show hints again with Settings->Misc->Hints
FIX discard old data exceeding buffer size already in background service to avoid high memory usage when doing long term logging
1.39 2020-10-03
NEW support PL2303 non standard baud rates

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.49 MB	Download APK

What's New:

1.40 2021-01-03
NEW send BREAK signal
NEW show hints again with Settings->Misc->Hints
FIX discard old data exceeding buffer size already in background service to avoid high memory usage when doing long term logging
1.39 2020-10-03
NEW support PL2303 non standard baud rates
1.38 2020-08-27
FIX log data to file with 'Send->Local echo' setting off
FIX disable auto correction

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.5 MB	Download APK

What's New:

1.39 2020-10-03
NEW support PL2303 non standard baud rates
1.38 2020-08-27
FIX log data to file with 'Send->Local echo' setting off
FIX disable auto correction
1.37 2020-07-26
NEW support serial control lines
NEW support CH341A
NEW settings in tabs instead of sub-screens. saves up to 1/3 of clicks as last tab is restored
1.36 2020-03-01
FIX CP2102N initialization
1.35 2020-02-15
FIX support more CH340 variants

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.5 MB	Download APK

What's New:

1.38 2020-08-27
FIX log data to file with 'Send->Local echo' setting off
FIX disable auto correction
1.37 2020-07-26
NEW support serial control lines
NEW support CH341A
NEW settings in tabs instead of sub-screens. saves up to 1/3 of clicks as last tab is restored
1.36 2020-03-01
FIX CP2102N initialization
1.35 2020-02-15
FIX support more CH340 variants

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.44 MB	Download APK

What's New:

1.36 2020-03-01
FIX CP2102N initialization
1.35 2020-02-15
FIX support more CH340 variants
1.34 2020-02-02
NEW support timestamp+hex in log files
NEW support multiple USB devices
NEW show vendor+product name from CDC and custom devices
1.33 2020-01-12
NEW send history
NEW support multi-port CDC devices
1.32 2019-12-08
NEW log data to file
1.31 2019-08-03
NEW save to custom folder
1.30 2019-07-20
NEW setting for optional 'auto scroll to end of buffer'

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.44 MB	Download APK

What's New:

1.35 2020-02-15
FIX support more CH340 variants
1.34 2020-02-02
NEW support timestamp+hex in log files
NEW support multiple USB devices
NEW show vendor+product name from CDC and custom devices
1.33 2020-01-12
NEW send history
NEW support multi-port CDC devices
1.32 2019-12-08
NEW log data to file
1.31 2019-08-03
NEW save to custom folder
1.30 2019-07-20
NEW setting for optional 'auto scroll to end of buffer'

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.44 MB	Download APK

What's New:

1.34 2020-02-02
NEW support timestamp+hex in log files
NEW support multiple USB devices
NEW show vendor+product name from CDC and custom devices
1.33 2020-01-12
NEW send history
NEW support multi-port CDC devices
1.32 2019-12-08
NEW log data to file
1.31 2019-08-03
NEW save to custom folder
1.30 2019-07-20
NEW setting for optional 'auto scroll to end of buffer'

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.44 MB	Download APK

What's New:

1.33 2020-01-12
NEW send history
NEW support multi-port CDC devices
1.32 2019-12-08
NEW log data to file
1.31 2019-08-03
NEW save to custom folder
1.30 2019-07-20
NEW setting for optional 'auto scroll to end of buffer'
1.29 2019-06-22
1.28 2019-06-19
1.27 2019-06-04
FIX Android 9 crash workaround after deep sleep
1.26 2019-05-06
FIX reuse app instance on USB device detect
1.25 2019-04-22
NEW undo clear
NEW file upload raw mode
1.24 2019-03-16
NEW file upload

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.44 MB	Download APK

What's New:

1.32 2019-12-08
NEW log data to file
1.31 2019-08-03
NEW save to custom folder
1.30 2019-07-20
NEW setting for optional 'auto scroll to end of buffer'
1.29 2019-06-22
1.28 2019-06-19
1.27 2019-06-04
FIX Android 9 crash workaround after deep sleep
1.26 2019-05-06
FIX reuse app instance on USB device detect
1.25 2019-04-22
NEW undo clear
NEW file upload raw mode
1.24 2019-03-16
NEW file upload
1.23 2019-01-27
NEW character delay

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.44 MB	Download APK

What's New:

1.31 2019-08-03
NEW save to custom folder
1.30 2019-07-20
NEW setting for optional 'auto scroll to end of buffer'
1.29 2019-06-22
1.28 2019-06-19
1.27 2019-06-04
FIX Android 9 crash workaround after deep sleep
1.26 2019-05-06
FIX reuse app instance on USB device detect
1.25 2019-04-22
NEW undo clear
NEW file upload raw mode
1.24 2019-03-16
NEW file upload
1.23 2019-01-27
NEW character delay

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.43 MB	Download APK

What's New:

1.30 2019-07-20
NEW setting for optional 'auto scroll to end of buffer'
1.29 2019-06-22
1.28 2019-06-19
1.27 2019-06-04
FIX Android 9 crash workaround after deep sleep
1.26 2019-05-06
FIX reuse app instance on USB device detect
1.25 2019-04-22
NEW undo clear
NEW file upload raw mode
1.24 2019-03-16
NEW file upload
1.23 2019-01-27
NEW character delay

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.42 MB	Download APK

What's New:

1.29 2019-06-22
1.28 2019-06-19
1.27 2019-06-04
FIX Android 9 crash workaround after deep sleep
1.26 2019-05-06
FIX reuse app instance on USB device detect
1.25 2019-04-22
NEW undo clear
NEW file upload raw mode
1.24 2019-03-16
NEW file upload
1.23 2019-01-27
NEW character delay
FIX hex character duplication on some devices
FIX scrolling crash on some devices
1.22 2019-01-04
NEW help on sending control characaters. Visualize in caret notation, e.g. ^L for FF and ^[ for ESC

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.42 MB	Download APK

What's New:

1.27 2019-06-04
FIX Android 9 crash workaround after deep sleep
1.26 2019-05-06
FIX reuse app instance on USB device detect
1.25 2019-04-22
NEW undo clear
NEW file upload raw mode
1.24 2019-03-16
NEW file upload
1.23 2019-01-27
NEW character delay
FIX hex character duplication on some devices
FIX scrolling crash on some devices
1.22 2019-01-04
NEW help on sending control characaters. Visualize in caret notation, e.g. ^L for FF and ^[ for ESC

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.42 MB	Download APK

What's New:

1.26 2019-05-06
FIX Android 9 crash workaround after deep sleep
FIX reuse app instance on USB device detect
1.25 2019-04-22
NEW undo clear
NEW file upload raw mode
1.24 2019-03-16
NEW file upload
1.23 2019-01-27
NEW character delay
FIX hex character duplication on some devices
FIX scrolling crash on some devices
1.22 2019-01-04
NEW help on sending control characaters. Visualize in caret notation, e.g. ^L for FF and ^[ for ESC

Variant	Arch	Android	DPI	Size	Action
N/A	N/A	Android 4.3+	160-640dpi	1.42 MB	Download APK

What's New:

1.25 2019-04-22
NEW undo clear
NEW file upload raw mode
1.24 2019-03-16
NEW file upload
1.23 2019-01-27
NEW character delay
FIX hex character duplication on some devices
FIX scrolling crash on some devices
1.22 2019-01-04
NEW help on sending control characaters. Visualize in caret notation, e.g. ^L for FF and ^[ for ESC