For control Arduino via Bluetooth, it’s a simple, basic and functional apps
The Arduino Bluetooth Relay 8 Channels App supports to control 8 channel relay module via Bluetooth
(HC-05, HC-06, HC-07 ect.) modules.
You can use for control the Arduino’s Pin13, Pin12, Pin11, Pin10 and continue in these form.
You can connect the Bluetooth modüle on Arduino’s RX pin0 and TX pin1.
(You can be modification Arduino code and connections.)
Install “ARDUINO – BLUETOOTH 8 CH.” Application from Google Play Store.
Download Connection schemmatic.and Arduino .ino code from below link:
Connect your devices.
Download Arduino .ino code to your Arduino Uno card.
(It takes just half hour.)
Also, you can reach 4 chanells and 12 chanells apps below link: