This one says the following phones are compatible
Nokia 3110 3110C 5200 5300 5610XM 5700 6110 6110n 6120 6120c 6290 6300 6500s 7390 7500 E51 E62 E90
5610XM is the only one that is for sale on ebay in the USA
But a video also shows this unit has one of the smaller headset jacks that phones used to have.
I don’t know it’s the only one listed that I can buy. But all I see are reviews of people saying it doesn’t work. Don’t know if they are actually trying them on the correct phone though.
Gopro Hero4 had this for microphone. But I highly suspect it might be using pin 4, as mic only needs 1 pin!
And today is the day that I learn that Mini-USB has 10 pins
Seems like there is hope:
This guy has these headphones come with a chinese smart watch and says it’s worked in a few different devices. He even mentions it working in a tablet and being recognized by the software. Which is incredible, because if that’s android he is talking about that gives me real hope it’s some kind of “standard”.
I actually had a credit card cell phone come with headphones like this but I tossed it a long time ago. Didn’t realize how rare or important it was at the time!!
this is supposedly from samsung?
This is true, in most cases, if you plug a USB to aux cable into your phone and connect it to your head unit. Some phones and MP3 players are designed to output audio signals via USB connection, like the original HTC Dream that used a single micro-USB connector for both power and audio output, but most phones and MP3 players come with a standard 3.5mm or 2.5mm TRRS headphone jack for a reason.
Many phones and MP3 players aren’t specifically designed to output sound via their USB connection. The USB connection is capable of transferring digital data back and forth, and can likely also be used to charge the device, but it usually won’t be designed to output an audio signal.
The only case where you would want, or need, to output audio from a phone’s USB connection to an aux input in your head unit is if the phone didn’t also include a headphone jack. Some phones, like the original G1/HTC Dream, omitted a headphone jack in favor of the ability to output sound via the USB connection.
Ordered an HTC Dream to check out, it says motherboard is tested but doesn’t say if it actually like, turns on? There is a working one for $80 bucks but not totally sure I want to go in on that. I should be able to tell a lot from just looking at the PCB. But I kind of expect 2 things, one is that the chip is fancy enough that the data lines for the usb can also just be internally switched to being audio lines, or what I expect is it has a dedicated chip to handle the switchover, just like the usb-c example I had.
It might be impossible to route on a 2 layer board, but if we go to 4 layers and we are already putting a level shifter on the board… Could pass everything through the level shifter and just have audio be at 3.3v.
Functionally I’m leaning to the one wire solution, but asynchronous data transfer by hijacking the data lines is really what I want to do.
Also found this page:
Compatible With Lg Xenon GR500 GU295 DLite GD570 Sentio GS505 CF360 Vu Plus GR700 Shine II GD710 eXpo GW820 Arena GT950 Opera TV
So I ordered an LG Xenon also. Going all in on usb hijack.