Serial USB Terminal
v1.57 · 2.4 MB · code 102
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File information
UpdatedFeb 5, 2026
PublishedJun 1, 2021
Packagede.kai_morich.serial_usb_terminal
Versionv1.57 (102)
Size2.4 MB
MD52b5336af487f7ea637d4874dd3d52f8a
Min SDK21
Malware scanTRUSTED
Signature SHA1FC:7B:CC:2A:E2:94:11:A2:A9:FB:08:6E:19:E1:C1:F0:DA:FF:FA:DB
SignerCN=Kai Morich, ST=Germany, C=DE
Total downloads500,000
This version500,000
DeveloperKai Morich
Age ratingEveryone
What's new in v1.57
1.57 2025-11-07
FIX copy from main text view with unmodified spaces
INFO Android 5.0 as minimum version
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
FIX copy from main text view with unmodified spaces
INFO Android 5.0 as minimum version
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
Security scan
TRUSTED
- Developer signature verified 2026-02-05
- Signature SHA1 FC:7B:CC:2A:E2:94:11:A2:A9:FB:08:6E:19:E1:C1:F0:DA:FF:FA:DB
- File MD5 2b5336af487f7ea637d4874dd3d52f8a
How to install Serial USB Terminal v1.57 on Android 5.0 Lollipop+
Takes about 2 minutes. You'll need roughly 2.4 MB of free storage.
- Grab de.kai_morich.serial_usb_terminal_102.apk — hit the Download button above (2.4 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches 2b5336af487f7ea6…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find de.kai_morich.serial_usb_terminal_102.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Kai Morich, ST=Germany, C=DE. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open Serial USB Terminal — tap Open on the install screen, or find the Serial USB Terminal icon in your app drawer.
Common install errors for Serial USB Terminal
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android 5.0 Lollipop or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.