Changing the MAC address on a Bluetooth Transmitting Dongle
- Thread starter Uncle Phil
- Start date
STRider
Site Supporter
Yeah, absolutely. To do embedded data like a MAC address right, during electrical test of the devices they will also write data to otherwise blank writeable memory space in the chip. It's far easier to simply encode a character string (MAC address) into the design to make fabricating the device and its test suite much less expensive.
Just buy 4 Senas and pair 1 to each BT device! 
Thinking some more this would not be sufficient, each dongle will need to be paired to the 20s so the dongle "knows" what to send audio to. Maybe you could pair one, clear the 20s pair the second dongle, clear the 20s pair the third dongle, clear the 20s and pair the 4th. Now all the dongles are paired with the 20s and the 20s is paired with the 4th dongle. Then, if they are clones, hopefully all 4 dongles would look the same as #4 to the 20s.
OP
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Uncle Phil
Site Supporter
I already have 4 Senas.Just buy 4 Senas and pair 1 to each BT device!
But then I have to swap Senas on the helmet ...
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Uncle Phil
Site Supporter
Tony - Since I paired the second dongle to the Sena after a factory reset, I have not tried to connect to the original dongle.
Sounds like a trip out to the garage just to see ....
Kevin_56
Site Supporter
Better the garage than the wood shed.Sounds like a trip out to the garage just to see ....
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Uncle Phil
Site Supporter
Didn't work - evidently the dongles do have unique MAC addresses after all.Tony - Since I paired the second dongle to the Sena after a factory reset, I have not tried to connect to the original dongle.
Sounds like a trip out to the garage just to see ....
Slydynbye
Will ride for Pie
Spoofing a different MAC address is common on Routers and firewalls. But without processor power those BT devices aren't going to change.
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Uncle Phil
Site Supporter
The manufacturer did get back with me and said that MAC addresses in the dongles were 'burned' into the dongles and could not be changed.
Still waiting to hear back from Sena to see if they have a solution.
Still waiting to hear back from Sena to see if they have a solution.
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Uncle Phil
Site Supporter
I finally got an answer back from Sena -
Thank you for contacting Sena Tech Support.
We appreciate your patience with us. I have checked your scenario with the team and they have confirmed that the 20sEvo can only store 2x Freewire pairings via the "1st phone and second mobile phone" option. So for the remaining two Freewires, you will have to go through the pairing procedure to link them with the headset.
Thank you for contacting Sena Tech Support.
We appreciate your patience with us. I have checked your scenario with the team and they have confirmed that the 20sEvo can only store 2x Freewire pairings via the "1st phone and second mobile phone" option. So for the remaining two Freewires, you will have to go through the pairing procedure to link them with the headset.