What bluetooth module do i need?

Projects General Guidance
1

Hello everybody!

My first post, excited to be here!

My Project:
Build a device, such that it will connect to a smartphone via bluetooth and be able to call. The role of the arduino would be to get a phone number from a SD card, save it on its memory, then send it to the bluetooth module to make that call once a button is pressed.

Now i did some research, here is what i have so far:

Arduino UNO with SD card shield.
RN52 bluetooth chip - has a2dp, hfp, hsp.

going through the manual, the rn52 has a command line where you can give it a phone number to call

My questions are as follows:

Will this work?
Is there any other bluetooth module that can do this? (RN52 is expensive - 20$)
Random question - I see bluetooth headsets on ebay for a fraction of the price of the rn52 (3$), what do they use as a bluetooth module?

PS. Im a complete noob when it comes to electronics, circuits and such, so be kind :slight_smile:

thanks

2

I think a HC05 bluetooth module should do the job. They are not expensive. Google HC05 bluetooth and also HC05 Arduino.

...R

3

Thanks but that module does not support audio input and output only data.

i did find another one: bc05-b. but i cant find any information on what commands i can use on it

4

miffka:
RN52 bluetooth chip - has a2dp, hfp, hsp.

the rn52 has a command line where you can give it a phone number to call

Perhaps that explains the $20. It is not just a bluetooth module but, if that is what you want to do and that is what it does, then that is what you want, and it sounds cheap to me.