Data Transfer Between Android And Arduino Via Bluetooth. Connect a resistor from common pin of 7 segment display to gnd cc or to 5v ca. To do this find the androids bluetooth settings and select the arduinos.
Just connect bluetooth module and 7 segment display on breadboard. Click on receive you will now receive data from the arduino in real time prerequisites this app has been developed on android studio and hence it is advisable to use android studio. In this example we have attached one push button to master device.
To make it easier we will use bleak an open source ble library for python.
Ive only done it with an android to arduino but still the android is written with java. From last few videos we are learn. You can do that using a an hc 05 6 pin blue tooth arduino module. Hc 05 bluetooth module interfacing with arduino uno electronicwings 29.