I am a tinkerer, but have no formal training, so I tend to ask questions in order to be sure of an appropriate direction to take. I love building gadgets, but sometimes my ideas are beyond the basic knowledge that I have attained.
Here’s what I want to accomplish, I’m hoping that someone can recommend the appropriate Bluetooth module and configuration (if it seems possible).
I want to turn on and off a small 12V motor using commands from my cellular phone. I am a software developer, so I understand and have written a basic program for my cellular phone which will connect to a comm. port, open it, and set the DTR and RTS lines high or low. This change 9v fluctuation on pins 4 and 7 can be used to control a relay circuit that opens and closes the power source to my motor.
I see commercial Bluetooth serial adaptors that appear to have the functionality that I need:
9v external power source to ensure the 9v power to drive the relay circuit
Supported connection to cellular phone as a serial port with no additional software required
I’m wondering if one of the Bluetooth serial port modules offered by this website would offer a similar drop-in functionality by allowing me to power it with 9v and simply search for the BT device and connect and start sending DTR and RTS high/low commands?
Any recommendations on accomplishing what I’m looking for?