thomas9x wrote:Some Bluetooth modules support wireless telephone headset applications. That would explain why there's only one mic input. My gut feeling is that this particular module may not work out, but hopeful I am wrong.
You were right sadly.

The module is a receiver unit and not a transmitter of audio, even though it shows a microphone input on it. So that is one dead end.
Greebo wrote:How bizarre the world is.... I just took delivery of exactly this module from the same seller (to be used in my Motorcycle helmet to play music from my phone).
Keep us posted with how you go, I'm going to solder some wires onto this new one and chuck it on a breadboard to play with in the next week or so. It seems to be much more flexible than the one I already have - if I can figure out how to make it all work!
For your use it should work well as a receiver feeding earphones. I could get it paired up with a Bluetooth A2DP transmitter without any issues.
It took me a while to understand that it was all about A2DP. If the items didn't have that, then it wasn't suitable for what we are looking for. I managed to purchase a Plantronics M50 headset that was A2DP enabled. The hard bit was to find a transmitter module or unit that could be plugged into the (recently installed) 3.5mm headphone socket on the 9X.
From my searches I couldn't find a bare module that I was certain would do the job, so I ended up with a plug in unit. Note that it is called a transmitter. There are look alike units that you might think would do. Read the small print carefully, as most of them are receivers that you plug into your Hi Fi input socket or whatever. ----->
http://www.ebay.co.uk/itm/230991694927? ... 1439.l2649
Testing it all out showed a problem. The sound was badly distorted when plugged into the transmitter, but it was fine when plugged into my hi fi amplifier. Cutting the story short. My TX has a Megasound card installed and the problem came down to the audio output of the Megasound card not liking having no load on it, and the output level was too high. This was sorted out by adding an 82 Ohm resistor in series with the output of the headphone socket and the Bluetooth transmitter, and a 8R2 Ohm resistor between the input of the Bluetooth transmitter and ground, which gives you around 20dB of attenuation to the Bluetooth transmitter along with adding a load to the output of the Megasound card. The attenuator was built into a jack plug after cutting off the original jack plug on the Bluetooth transmitter.
The Bluetooth transmitter is attached using Velcro to the back of the Frsky module and it doesn't get in the way. The jack plug also has some Velcro on it, so that it can be stored away when not in use. Obviously you could take off the Bluetooth transmitter if you so wish.
ShowMaster wrote:All in good time. I'm sure as more people take delivery on a talking tx no matter the brand, BT will be a hot topic.
I am certain of that, as added noise pollution on the flight line/pilots area from all Taranis' and Jeti transmitters, along with the rest when they come will get to a level where pilots will start complaining at each other. I now use the Bluetooth system and have made it known that I hope others will follow suit, or we (as in my local club) will have to raise the issue at a meeting, with a motion in place to limit the volume levels, or even insist on an earphone to be in use whilst with other active pilots. This I feel will be even more of an issue in clubs that are glider only or slope flyers. This is all before you think about the safety matters with a group of transmitters all using the same voices saying different things. It would be so easy to mistake someone else's transmitter saying something. thinking it was yours.