Hi! I am a new Android programmer and I am going to develop an app which includes bluetooth. The idea is to put a bluetooth transmitter in a place, so when an Android device gets close to it, a message is sent to it.

I have no idea about the topic and I need some information to determine if I would be able to do it.

I found this transceiver, but I donīt know if it is what I need:
Wireless Bluetooth RS232 TTL Transceiver Module

If it is good for me, how can I manage to make the device transmit signals? I see it as a component of a more sophisticated circuit.

Thanks for your help!