Builtin bluetooth is not working

budimanjojo

For more efficient feedback on bugs, be sure to provide the following basic information to reduce communication costs
[1] Describe in detail the error you encountered:
My unit doesn't seem to have the second bluetooth chip in the board. I've tried setting sys.fyt.bluetooth_type to 0, 1, 5, 6, 7. The bluetooth is greyed out and I can't enable it. Using the bluetooth menu from Android settings (it's called "Bluetooth 2") works. My unit is FYT=8 and the original firmware has sys.fyt.bluetooth_type=0.
[2] Provide screenshots of system information, in the car settings - about - long press the upper left corner of the picture for 3 seconds, the contents of the pop-up window to take:

^^
I'm using UIS7862 not UIS8581, it's a bug from the system information that should be fixed in the next version according tg @YAOXILONG

HondaCivicDriver

I had the same problem with the internal BT chip 10-29 with inferior performance & bad connectivity & bad call quality.
Upon flashing my config-txt to bluetooth type = 7 it swapped to the Qualcomm BT chip inside my Mekede m6pro (Dudu 6 Beta). Everything improved a lot. You might search my comments on this in the forum.

budimanjojo

HondaCivicDriver My headunit doesn't have any external BT chip (confirmed by looking at the motherboard). So I have to use the internal one.

HondaCivicDriver

Oh, that's too bad. Do you "suffer" from bad audio quality when phoning then?

surfer63

phone over bluetooth is one of the oldest and simplest protocols.
Bad phone quality has nothing to do with the BT protocol or the BT version (in this case) as the internal BT chip supports it all. It has to do with the hardware around it.
"inferior performance & bad connectivity & bad call quality" is how FYT connected the internal and external mic in the same parallel scheme without separating them. It has nothing to do with the builtin, RealTek or qualcomm BT chip.
The 8581 and 7862 simply have bad MIC circuits.

HondaCivicDriver

surfer63 Very interesting. This discussion was also thouroughly done on XDA forum but I didn't know that it is "only" about the internal mic circuit.
When I changed the config.txt on my Dudu6 to the Qualcomm chip type 7, coming from the 10-29 built-in BT chip, call quality improved enormously and instantaneously as in the nasty echoes stopped.
Just to understand it correctly, "it has nothing to do with the BT chip", but that was the only thing (I am aware of) I had changed. So, somehow the mic circuit is differently controlled depending on the BT chip. That's just my logic, without knowledge of the electronics.

surfer63

In the dudu telegram channels it was mentioned that also all FYT 7862/8581 models after June 2024 should have separate MIC circuits. That is manufactured after June 2024. Not what resellers sell, sometimes from old stocks, after June 2024.

HondaCivicDriver

surfer63 Interesting, but I bought my m6pro in December 2023 (or a even earlier).