Question Blue tooth pairing without interface

[onespeedbiker]

From what I have been able to determine, bluetooth works on a master slave principle. The normal way BT is paired is you turn on the pairing mode and the master has a visual interface that allows you to pair the slave to the master. However how is this possible without an interface? I am hearing impaired and use a dedicated RF transmitter headphone (plugged into a 3.5mm jack) to listen to TV. However I have seen receiver/ transmitters dongles for sale that claim you can plug them into a 3.5mm jack and pair them with BT headphones and/or speakers. I use a similar wireless setup, receiver only, that connects my wired headphones to BT with my tablet, but again the tablet is the master with visual interface.

So how does reciver/transmitters (TX/RX selector) work? I assume the RX works as a slave similar as the BT pairing with my tablet, so I can only assume the transmitter works as a master, but how does it pair without a visual interface to recognize the headphones/ speakers? The instructions indicate that you put both in pairing mode and they pair by magic, but with one receiver transmitter I tried this with the dongle and BT headphones would not pair.

 

[Ralston18]

Any links to those receiver / transmitter dongle devices? Make, model?

Try to find the applicable User Guide/Manual via the manufacturer's website.

You can also do a more generic search based on manufacturer and model number. However that can be a bit risky.

Some sites will show up that may have very little to offer beyond perhaps the manufacturer's name in the URL.

Bogus document sites are not uncommon.

 

[onespeedbiker]

The manufacturer of the one I tried was Ugreen bought on Amazon and the instructions where as I stated. Place both the transmitter and headphones in pairing mode and they will pair. That didn't work. I'm sending both back and am purchasing a 1Mii receiver/ transmitter which I suspect has the same instructions for pairing in the transmitter mode (again it requires an interface with the master in receiver mode), along with a different set of headphones (I am using a 1Mii brand receiver for my wired headphones).

"Press the Bluetooth button of 1Mii Bluetooth adapter to pair with your Bluetooth headphones or speakers one by one, this Bluetooth audio adapter already in pairing mode for the first use once power on."

Again I can't find any BT headphones that show pairing without an interface so I really unsure how this is possible.