Communication using a Bluetooth module

[comwarrior]

The HC-06 module (if you have the backplane with it too) has a state output...
This output toggles on and off when not paired and is solid on if it it...
So, you can write a routing that looks to see if this pin is on or off and waits to see if it's status changes.

Also, the pic can send an "AT" to the HC-06, if it receives an "OK" then the module is NOT paired...
However, if the module IS paired and an "AT" is sent then the "AT" is transmitted to the phone where the phone could be programmed to reply with it's own code... or not reply at all... In ether case the pic will know it's paired...

[Balachandar]

Thanks a lot, Robert, Amoque and comwarrior for your helpful replies.

Replies from Robert and comwarrior give me the following idea: Once the device wakes up from sleep, keep checking pin 24 (Status LED) of the BT module for high pulse width. If and when the pin is continuously high, it means that the connection with the phone is established.

Amoque, I am using Samsung Android phone and the app Tasker (or ITTT) has many uses and I am sure, I will be using it for one of my future projects.

Bala