GitHub - harry1453/android-bluetooth-serial: A library for Android to simplify basic serial communication over Bluetooth, for example when communicating with Arduinos.
![Dx-bt16 4.2 Bluetooth Serial Port Through Ble4.0 Bqb Android Wireless Module - Integrated Circuits - AliExpress Dx-bt16 4.2 Bluetooth Serial Port Through Ble4.0 Bqb Android Wireless Module - Integrated Circuits - AliExpress](https://ae01.alicdn.com/kf/HTB1Mxx2U7voK1RjSZFNq6AxMVXaq/DX-BT16-4-2-Bluetooth-serial-port-through-BLE4-0-BQB-Android-wireless-module.jpg_640x640.jpg)
Dx-bt16 4.2 Bluetooth Serial Port Through Ble4.0 Bqb Android Wireless Module - Integrated Circuits - AliExpress
![arduino uno - Why can't my bluetooth receive serial data from my android phone, but can send serial data from my bluetooth to my android phone? - Arduino Stack Exchange arduino uno - Why can't my bluetooth receive serial data from my android phone, but can send serial data from my bluetooth to my android phone? - Arduino Stack Exchange](https://i.stack.imgur.com/mwQEs.jpg)