but everything I try does not seem to work
What did you try so far?
I have several of these commercial bluetooth handsfree things
Which ones have you tried?
What I have tried is the commercial ones for standard applications such as Uniden, Parrot, Blue Ant, etc but none of them are what I am after to use and to make and I do not like their functionality (or price of higher end versions).
I have tried sending commands based on the standard AT tables in Ascii, Hex,Byte, etc with different board rates, (even connected phone to computer serial to send in terminal to see what happens) but I must be missing something to make it work and respond.
For example I send out the command “AT” which from what I see should generate a response of “OK” but I do not get a response. I have tried sending out “AT” and chr(13) in the various ways above in case I need a CR to effect the command but I do not seem to get any response as I should expect.
I am thinking maybe I need a full string with start and end codes to work but I am lost on this.
I am not interested in voice just to be able to connect, query, send call/hangup so would have thought that was easy.