Use APKPure App
Get Bluetooth Serial old version APK for Android
Gebruik dit om de gegevens van uw telefoon naar andere apparaten via bluetooth.
Use this to send data from your phone to other devices through bluetooth.
Tested with: Arduino Uno R3 + module bluetooth HC06
NOTE: You have to pair your modules/devices with your phone first!
Tutorial: https://www.youtube.com/watch?v=hcRSkKvne18
Example here: https://goo.gl/xjXr2G
More at: http://www.hoangvancong.com/