BlueCArd
v2.0 · 1.4 MB · code 2
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File information
UpdatedSep 6, 2025
PublishedMay 7, 2020
Packagecom.nenoff.ardbttest
Versionv2.0 (2)
Size1.4 MB
MD55cb43bd26727aa3f5caba14e82a3ff38
Min SDK23
Malware scanTRUSTED
Signature SHA1F8:6E:39:36:2C:FA:EA:9F:CB:A7:B9:E3:EC:0E:44:D8:01:E2:DD:7F
SignerCN=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US
Total downloads1
This version1
DeveloperNenoff UG
Age ratingEveryone
What's new in v2.0
1. STATE pin not used anymore. Heartbeat signal used to detect connect / disconnect
2. END byte removed, command now consists of header and parameters. Header fields (3 bytes) :
* START (0x1)
* COMMAND
* Num of parameters
WARNING! This version is not compatible with older Arduino sketch. If you update the app you have to update the Arduino sketch also!
2. END byte removed, command now consists of header and parameters. Header fields (3 bytes) :
* START (0x1)
* COMMAND
* Num of parameters
WARNING! This version is not compatible with older Arduino sketch. If you update the app you have to update the Arduino sketch also!
Security scan
TRUSTED
- Developer signature verified 2020-09-16
- Scanned for malware 2020-10-02 07:21:26
- Signature SHA1 F8:6E:39:36:2C:FA:EA:9F:CB:A7:B9:E3:EC:0E:44:D8:01:E2:DD:7F
- File MD5 5cb43bd26727aa3f5caba14e82a3ff38
How to install BlueCArd v2.0 on Android 6.0 Marshmallow+
Takes about 2 minutes. You'll need roughly 1.4 MB of free storage.
- Grab com.nenoff.ardbttest_2.apk — hit the Download button above (1.4 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 5cb43bd26727aa3f…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.nenoff.ardbttest_2.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=Android, OU=Android, O=Google Inc., L=Mountain View, ST=California, C=US. 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 BlueCArd — tap Open on the install screen, or find the BlueCArd icon in your app drawer.
Common install errors for BlueCArd
- "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 6.0 Marshmallow 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.