Use APKPure App
Get Bluetooth Controller old version APK for Android
Used to control Arduino's Bluetooth
Can be used for Bluetooth control of electronic circuits.
I made it to test HC-06 of Arduino.
The Type1 tab allows you to test nine signals.
On the type2 and type3 tabs, you can make the letters of the direction buttons as if you were driving a car.
The test can be controlled more easily.