Use APKPure App
Get BlueDuino old version APK for Android
BlueDuino easy way to send and receive serial data to your Boards with Bluetooth
BlueDuino app creates to make an easy way to communicate with Bluetooth Module with Arduino or esp32 or any board have Bluetooth easier and send receive serial data between devices
You Must have some knowledge with the use of Arduino or other board with a Bluetooth module to can handler with the app easier.