This application is to test the Bluetooth SPP protocol with SIM800 GSM module or any other SPP protocol enabled devices with Android handsets. You can use this app to connect to any bluetooth device with SPP support and you should be able to send and receive data easily by just scanning and connecting to the device.
Drop a mail to [email protected]
for more details. You can watch my Youtube video of how to use this app at https://youtu.be/zdQb8r2xRK8