yashsingh1/xdaforums huggingface dataset:
[MTCD  Android Head Units Q&A] jimimatthews:
Has anyone successfully done this before? It would be very helpful, I don't want to desolder my MD725 Type 2.
[MTCD  Android Head Units Q&A] pir8man:
I asked, I saw two other people ask....

Bluetooth dongle does NOT effect pairing. I installed the bluetooth dongle and still had the OBD/phone pairing restriction.
[MTCD  Android Head Units Q&A] yves31:
I tried to force Oreo to use gocsdk, and unfortunately it did not work.

I copied gocsdk in system/bin folder and renamed it to sdsdk with proper permissions. Internal MD725 was recognized, and BT name and pin showed up (without "sdsdk", name and pin fields were empty). My phone was able to see the BT device CAR KIT, however, failed to pair it.
[MTCD  Android Head Units Q&A] pir8man:
It sounds like you were attempting the Bluetooth Echo Fix v2. This fix is not updated for OREO roms yet. Others in that thread had the same issue trying to mod an OREO rom.

The bluetooth USB Dongle is basically just to replace your internal WiFi/BT chip with an external one and does not require modding the /system/bin folder.

This may be because your particular HeadUnit happen to get a lemon of a WiFi/BT chip. (Which happens randomly in every production facility.) Or you may have no BT antenna soldered by the factory, making your reception extremely poor. Or your factory BT antenna just isn't making the grade through the HU metal chassis and your dashboard.

Simply soldering a BT antenna will solve most people's issue. Especially if you happened to not get one wired at the factory. Anywhere from 3-9 inches of wire will suffice.

My particular HU had the BT wire (about 3 inches long) wired at the factory. I still tried the USB dongle. My unit had the same chipset, so I had to do the R66 to ground wire mod. Everything operated the same as the internal chip from then on.
[MTCD  Android Head Units Q&A] marchnz:
More likely an attempt to get BT working on Oreo on a type 2 (non GOC) MD725.
[MTCD  Android Head Units Q&A] yves31:
You are right.

Some people suggested similar approach to fix type 2 problem and complained no one tried. I tested and it didn't work.
[MTCD  Android Head Units Q&A] JonatanP:
after unwelding the module, it seems that I dropped some liquid to weld and short circuit and broke the motherboard.

I spoke with dasaita by private message on aliexpress asking if it was possible to buy a new motherboard.

I also took advantage and bought the new PX5, the price was about $ 170, maybe something expensive, but I'm sure you can only buy the motherboard to them and so solve your problem.

Now I have my radio working, I had to remove the sides of the new motherboard with pliers since it did not fit in my radio, so far it is working perfectly
[MTCD  Android Head Units Q&A] totynho:
I can not understand much ... I have a small USB Bluetooth module, no WIFI ... Can I use it on my headunit instead of the internal bluetooth? I did not understand how you can do this ...

[IMG="bluetooth usb"]https://ae01.alicdn.com/kf/HTB1JvMCqXOWBuNjy0Fiq6xFxVXaF/Mini-USB-Bluetooth-2-0-USB-Dongle-V2.jpg_640x640.jpg[/IMG]
[MTCD  Android Head Units Q&A] RomainD2:
Hi,

I have an android PX5 head unit, and the wifi is really, really slow... Like 2-3 MBps in download. I read all this interesting thread, and found some guys which remove the Bluetooth/Wifi chip!

I can't use the MD725 chip because I am already with android 8, so Bluetooth will not work. I have SD968 bluetooth chip.

Do you have some chip references which are working well for wifi and blutooth in Oreo ? I would like to replace my actual chip directly on the board instead to add USB dongle. Is someone has ever done that ?

Thanks for your help
[MTCD  Android Head Units Q&A] typos1:
Not quite true - its only MD725 type 2 that wont work, MD725 type 1 does work.
[MTCD  Android Head Units Q&A] RomainD2:
Thanks for your answer.

And how do we know if the module is type 1 or 2 before buying it? Is comfast dongle are sometimes type 1, some other type 2?
[MTCD  Android Head Units Q&A] typos1:
Type "getprop bt.md725.type" in a terminal and it will answer 1 or 2.
[MTCD  Android Head Units Q&A] RomainD2:
Yes so it is after buying it. I can't know it before buying it.
[MTCD  Android Head Units Q&A] imran0487:
what android version are you using?
[MTCD  Android Head Units Q&A] RomainD2:
I have open my head unit device, and I found that they are two chips, one SD968 for bluetooth, and one for Wifi (Realtek rtl8188etv).

In order to avoid to replace the wifi chip, I would like to know if it is possible to use a Wifi USB module and select this module by default on Android.

When you are installing your bluetooth/wifi USB dongle, do you have a way to select the USB device instead the internal Wifi ?

Thanks
[MTCD  Android Head Units Q&A] sev:
can you provide a pic of the sd968 module?
[MTCD  Android Head Units Q&A] ZeligPC:
Sorry marchnz, i can't find your posts... Please, where can I see that info in logcat?
[MTCD  Android Head Units Q&A] samsungrek:
Bluetooth not working after removing the BT/WiFi chip

Hi everybody,

I have read the whole thread and I notice that in my case I had to remove the RTL8723BU from my Hizpo Android Unit in order to make Comfast CT WU725B Dongle BT/WiFi to work because my internal BT is MD725.

I had problems from the beginning with BT and WiFi. Today after I removed the RTL8723BU I got WiFi to work but only sometimes and the bad news is that Bluetooth is not working: There is no Bluetooth name it should be CAR_KIT and PIN 0000, that usually comes after resetting. I tried everything: deleting Bluetooth data, rebooting without dongle, rebooting with dongle, tried to disable/enable MD725 from settings etc. I cant find my device or find the unit to connect.

Any ideas what else could it be done or reasons why it doesnt work? I remember that the Comfast dongle did blink with WiFi and also with Bluetooth when I first time hook it to unit but this was before removing the RTL8723BU chip and WiFi antenna. Then I got WiFi to work and randomly bluetooth to work also but I think Bluetooth was the internal not the external dongle. Then I decide to remove the chip. After removing the internal BT/WiFi chip the Comfast didnt show any blue leds but even so it makes WiFi to work.

I also contacted the seller.

From Ebay seller:

"Kindly tell you that If both the wifi and the Bluetooth can not work, please try to unplug the core board and replug the core board since the core board maybe loose."

To Ebay seller:

"Hi I did replug the core board like you told me, twice but still the same problems. WiFi and Bluetooth not working. It works rarely sometimes after resetting (Settings->CAR>Factory settings> And changing BT from MD725 to other and back to MD725. And after multiple rebootings the bluetooth and wifi works for one day and next day same problem."

From Ebay seller:

"If you couldn't connect the wifi and bluetooth both,we could send the GL852G IC to you ,you could change it."

I dont know what this GL852G IC(it will arrive in 2-3 weeks) replace, but I hope I can get some help and answers from you guys.

Regards
[MTCD  Android Head Units Q&A] kmlnvm:
In short, I upgraded to hal9k my px5. Bluetooth stopped working, wifi works.

I tried factory reset, downgrading from 8 oreo to 6 marshmallow, clearing cache, data, change BT driver etc... But nothing worked.

Device name and pin are always empty after rebooting and I can't pair any device with BT.
[MTCD  Android Head Units Q&A] kmlnvm:
Ok, finally I managed to fix the problem.

With the little help of screwdriver I've opened HU and removed board with PX5 and placed it again in connector using more power than before.

It worked, my BT device is SD-968.
[MTCD  Android Head Units Q&A] sev:
can you post a pic of the sd-968 module? I want to know what chipset it is.
[MTCD  Android Head Units Q&A] kmlnvm:
https://img.xda-cdn.com/u7uJWvnuYEvv4ki0YB-iwyQfHZk=/http://i63.tinypic.com/28i8dqp.jpg
[MTCD  Android Head Units Q&A] sev:
curious what chipset is under that sticker
[MTCD  Android Head Units Q&A] mobileman88:
what do you mean by using more power than before? Mine is supposed to be SD-968 but not working at all. Can't use BT functions. Searching for a long time and finds nothing. Don't think the BT is turned on at all.
[MTCD  Android Head Units Q&A] kmlnvm:
Connection of female gold pin connector (px5 board) with male connector (main HU board) was a bit loose , I have to use more power/pressure than before, my gold pin connector isn't original, it's higher approx. 1mm (original was damaged when I had to use OTG method to reflash board).
[MTCD  Android Head Units Q&A] GirthyPancakez:
Has anybody tried connecting an input device such as a Bluetooth controller?

I’ve been wanting to connect a Bluetooth control to the unit to be able to use it for emulators. I have Bluetooth module SD-968. It will connect to the controller but not recognize it as a input device so it won’t work at all. I want to buy the Comfast wu725b but not if it will get the job done. Any thoughts?
[MTCD  Android Head Units Q&A] typos1:
BT controller ? You mean to be able to control Android functions ? No, cos AFAIK the BT only supports phone and A2DP profiles, nothing else. and its MCU controlled, not Android, you could try a BT dongle.
[MTCD  Android Head Units Q&A] GirthyPancakez:
Well that’s why I’m asking if the BT dongle that people in this thread has recommended for an external BT dongle will recognize an input device such as a BT controller
[MTCD  Android Head Units Q&A] John_Woo:
I unsoldered the board and plugged in a Comfast dongle. Wifi is faster, but Bluetooth still doesn't work :(
[MTCD  Android Head Units Q&A] veriluxxxx:
I have the comfast device but cant get it work for some reason
[MTCD  Android Head Units Q&A] warhead19:
I have the same problem and have been looking for a solution for a year now. Wi-Fi and Bluetooth work with Hal9k Mod v2! Unfortunately, this Rome is not really usable due to the 1GB Ram
[MTCD  Android Head Units Q&A] typos1:
It works fine if you use the microG setting.
[MTCD  Android Head Units Q&A] warhead19:
Thanks for the tip :)

Unfortunately, does not work with Micro G .. The driver seems to be loaded, the blue light on the stick lights. But no devices are found. The HeadUnit can not be found by other devices.

Everything worked right on Hal9k Mod v2
[MTCD  Android Head Units Q&A] typos1:
Contact Hal9k_ and ask him about it, have you tried 2.3 ?
[MTCD  Android Head Units Q&A] warhead19:
Yes, v2.3 works! But because of the 1gb Ram is very slow ...
[MTCD  Android Head Units Q&A] typos1:
Not if you use microG !

I guess youre gonna say the BT dongle doesnt work with microG on 2.3 either, cant see why, again, contact [MENTION=5092263]Hal9k_[/MENTION] and I m sure he ll look into it.

BTW the factory ROM is also slow cos of the 1Gb RAM.
[MTCD  Android Head Units Q&A] warhead19:
Sorry, I think we have talked past each other ^ ^ BT and Wifi work under v 2.3 with and without Micro G. Under v1.x it generally does not work. My mistake: D

I try the v2.3 again with Micro G and check the performance.

Can I Use the Radio and Music App from v1.x under v2.3? I think they are simply better looking and easier to use

Thanks for your Help!
[MTCD  Android Head Units Q&A] typos1:
I think youll find the radio app is the same in v2.3 as 2.1, you just get the option of 4 skins in 2.3, the first skin is the same as 2.1, so just use that, you could theoretically use any radio from any RK3188/PX3 MTCD ROM too.
[MTCD  Android Head Units Q&A] warhead19:
Are you talking about v2.x? I think you mean v 1.3! v2.x is the Android 7 Rom!
[MTCD  Android Head Units Q&A] typos1:
Doh, stupid me ! Lol

Yeah I particularly hate the 7.1 built in apps, they look horrid, just working on trying to change the look of them actually.
[MTCD  Android Head Units Q&A] warhead19:
Yes thats my Problem... The performance and the Apps looks horrible -.- But its the only rom where Bluetooth and Wifi are working wit the Comfast Dongle :D
[MTCD  Android Head Units Q&A] typos1:
Right I get you, maybe [MENTION=5092263]Hal9k_[/MENTION] could get it working on his Lollipop ROM for you ?
[MTCD  Android Head Units Q&A] Latif2:
Need professional Help, android HU wifi not working

I recently bought Android HU for my mercedes E 2005 form Isudar China.

Android 8.0 Octa core 4gb Ram and 32GB rom with DSP.

After finishing installing it. I tried to turn on the WiFi but there was no way to turn it at all (it stay in off side). I also notice that the MAC address for the WiFi is 02:00:00:00:00:00 , which I think it is wrong. In the other hand the Bluetooth is working but i couldn’t use it for Internet (it work only for calling and music play) and I can’t send or receive any file using Bluetooth. I bought TB-link WiFi dongle but didn’t work I also tried to use 3G dongle, it also didn’t work. When I connected other device to USB (DAB) it works. I asked the seller what to do?! He didn’t give me answer. I need professional help. I don’t know if the problem is hardware or software. Because the device is totally new, and from beginning doesn’t work.. Every help is appreciated.
[MTCD  Android Head Units Q&A] techo91:
Hi,

I see that nobody answers and I can give you some basic info to start with.

For the WiFi almost certainly is hardware. When the Mac is zeros that means that the software is not seeing the chip. Even though Bluetooth and WiFi are on the same chip they have separate connections to the main board.

Two days ago I was changing the Bluetooth/WiFi chip for the second time. The first time was the MD725 issue with android 8.0 and the second time the chip itself stopped working. Now it looks fine but I still think it might fail again because when I do speed test for the WiFi I see that the chip becomes quite hot.

About the Bluetooth. It doesn’t offer internet sharing. This is by default on these units. Phone calls and music playing (A2DP) is all that you get.

External WiFi dongle will work only if it has a compatible chipset. If you search around the forum you will find more info as this was discussed many times before.
[MTCD  Android Head Units Q&A] Latif2:
Thank you so much for your help.. i thought it would be a software problem because the mac Address start with 02:00:00:00:00:00.

Is there anyway to know what would be a compatible wifi usb??!and Is there any way to locate the wifi unit inside the HU and see if I can reconnect the loose part?!
[MTCD  Android Head Units Q&A] techo91:
There is a Comfast USB dongle mentioned in this tread, but I can’t say if it works with android 8.0. The one that I have worked with Android 6, but on 8.0 it shows no signs of life.

The Bluetooth board in your unit is not plugged, it’s soldered. In your place I would try to deal with the seller as this is a warranty issue. If the seller doesn’t help then you can order another Bluetooth/WiFi board (they are dirty cheap on AliExpress) and first try to improve the soldering, if it doesn’t work swap the chip with the new one that you ordered.

That’s what I did and it’s working on my unit.

Edit: the USB dongle is Comfast WU725B
[MTCD  Android Head Units Q&A] Latif2:
Thank you again for your reply... it really help.. I open the HU i saw only (SD-968 v3).. I search for it in the internet it is the bluetooth unit without wifi.. so the wifi i think it is seperate Unit on the main board.. but i wasnt able to locate it.. i found the Antenna connected directly to the main board..

I talked to the seller.. he said send it back ( i have to pay shipping 60 euro and i will lose the Tax) and wait again 2 Months. The other problem that I removed the old Radio unit which use fiber optic and now really hard to return it back .
[MTCD  Android Head Units Q&A] maxiauer:
Hi !!

So, for the people that was able to get the Bluetooth dongle to work, has the improvement been only on playing music? Or the mic now also works better on phone calls?

In my case when making calls I can hear people OK, but people complains that my voice sounds really bad. I've tried with different external mics + the internal one (no difference reported by called party). Not so sure the Bluetooth chip is the guilty one though...

Anybody knows where (on the motherboard) the mic signal is converted from analog to digital?

Thanks !!
[MTCD  Android Head Units Q&A] techo91:
When I was looking for this I traced the external and the internal go to the SOM board connector and through that to the SOM with no filtering on the circuit. I didn’t check on the SOM itself.
[MTCD  Android Head Units Q&A] techo91:
Sorry, double post.
[MTCD  Android Head Units Q&A] newbie782:
guys, who is running external bluetooth, BLE is working as well ?

Ok, I read here that it does not affect BT modes. :(
[MTCD  Android Head Units Q&A] Fratopolis:
I noticed the mic was really bad as well so I called my office line and did a test with voicemail. The mic on mine is real sensitive an I'm guessing it may be on others as well. I always remember using Bluetooth talking loud when I'm in the car. So instead I spoke at normal volume and even wispering and I came across crystal clear.
[MTCD  Android Head Units Q&A] Pacote-san:
Anyone know if this dongle works with Android 9.0?

Did a little troubleshooting with Hal9k and he confirmed that Android Pie doesnt have the required drivers for my BT (SD-968) so its impossible to make it work.

My current 2 options If I want to upgrade in the future would be:

1) - Try getting this USB dongle

2) - Soldering this and trying it out.

https://www.aliexpress.com/item/32974934318.html

One user said he tried and didnt work but perhaps he just forgot to change on factory settinsg from SD-968 to I145

Since its cheap, I ordered one I145 and will try when it arrives.
[MTCD  Android Head Units Q&A] marchnz:
Suggest the MD725 instead.
[MTCD  Android Head Units Q&A] Pacote-san:
Saw you reply and will get it instead :)
[MTCD  Android Head Units Q&A] knutarn:
Need USB dongel to my joying 2din player. Need to connect my ecu on blutooth and the blutooth on the player not work on it. Can i get other blutooth? Is android 8
[MTCD  Android Head Units Q&A] knutarn:
MCU? :)

This: https://www.joyingauto.eu/joying-la...7-inch-car-stereo-repplacement-head-unit.html
[MTCD  Android Head Units Q&A] typos1:
It will say what your MCU is in settings, but if your stereo has been bought within the last 2 years it is deffo not MTCD/E and therefore you are in the wrong forum, this is a forum only for MTCD/E units.
[MTCD  Android Head Units Q&A] knutarn:
But it for a year ago. its last type i think :)
[MTCD  Android Head Units Q&A] typos1:
You need to find out for sure, look in settings to see what your MCU is.
[MTCD  Android Head Units Q&A] oton:
You used an OEM hands-free bluetooth kit. Please tell me how. How did you connect it to android HU. I would do the same.
[MTCD  Android Head Units Q&A] matrixx1:
Hi, will Comfast wu725b work with px6 android 9?! Its a dasaita/hot audio mtce MCU ver. 3.40, hal9k mod 4
[MTCD  Android Head Units Q&A] Gnomepises:
<<<<SOLVED FOR MY HU WITH MALAYSK OREO 8.0 and this wifi Stick>>>>>

My wifi module in my px5 was not working weeks ago. I think it is already broken. I've tried to install several firmwares without any positive result. I couldn't turn on the wifi. BUT...

I can confirm this stick Comfast wu725b is compatible with my unit and with Malaysk 8.0 Rom. This Wifi stick has solved my problems. It has been 3 months without wifi.
[MTCD  Android Head Units Q&A] matrixx1:
Hi can you explain how did you do it? For me. It didn't work. I have px6 android 9 but no matter if I change bluetooth under factory settings to md725it doesn't work is not to be seen and alsocdosent see any bluetooth devices
[MTCD  Android Head Units Q&A] Gnomepises:
First, I must say i didn't have problems with bluetooth as the title of the post, I had wifi problems. But i think it could be similar.

To fix my wifi I've only...:

- Plugged the wifi USB stick to the Android head unit.

- Pushed reset boton 15sec to reboot my Android head unit.

And that's all.

In settings, "wifi" was already turned on.

If it doesn't work... Probably, you need to desolder the bluetooth from the Android head unit :rolleyes:

Wich firmware are you using? I have Malaysk 8.0.
[MTCD  Android Head Units Q&A] dafunky:
Hello, someone can confirm that this dongle Comfast wu725b work with android 9?
[MTCD  Android Head Units Q&A] thebaseur:
Hi, for me it's nor work on my android 9. Sometimes it's reconized on Bluetooth setting but connexion not working :/
[MTCD  Android Head Units Q&A] teckynerd6249:
Hey I know this thread is old but I want to no if anyone was able to get a usb wifi/bluetooth dongle to work with the cheap Chinese android radio head units ?
[MTCD  Android Head Units Q&A] typos1:
Dont really think April is "old", it was only 4 months ago.

What do you mean "cheap Chinese android radio head units" ? You cant group all the head units into one - they are no different from any other product, ie there are cheap low quality ones, cheap good quality units, expensive low quality units and cheap good quality units and everything in between. You cant assume that everything that comes from China is the same.

This forum is for MTCD/E units, so we can only really answer for those units, we cant answer for the hundreds of other units out there. These units are not particularly cheap either, they are at the mid to higher end of the market, there are plenty of cheap units out there for a quarter of the price.

Yes some people have done it, but not sure why youd want to - they have built in wifi and built in bluetooth.
[MTCD  Android Head Units Q&A] thefunkygibbon:
i think he was referring to the age of the thread, not the last comment.

but i too would like to know what the deal is with adding a bluetooth dongle. i really want to easily be able to use a bluetooth controller/ tpms/dashcam/obd2 but i can't use any of them right now. :(
[MTCD  Android Head Units Q&A] typos1:
Why cant you use them right now ? MTCD/E units are compatible with BT OBD and dash cams dont need BT. For TPMS you normally either buy a specific TPMS unit with the head unit or get a universal one which comes with a plug in module that has BT on it.
[MTCD  Android Head Units Q&A] thefunkygibbon:
bear in mind i already have all these things so i'm not looking at going out to buy them all again hence the (not unreasonable) question.

\

obd2 i have now managed to get working after a bit of faffing around.

dash cams , well mine, is bluetooth for the control connections and then wifi to transfer the videos etc.

tpms, i have a universal bluetooth valve units. the built in bluetooth of the head unit just doesnt ever connect to them even though the app is looking for those specific ones. (doesnt need to pair).
[MTCD  Android Head Units Q&A] typos1:
Never suggested your question was "unreasonable", I just couldnt understand why you said you couldnt use them right now when the units can use them - you hadnt explained what you had then.

The built in BT will only connect to OBD and phones, you ll need a BT dongle to use your TPMS unit.

For your dashcam it seems you only need to connect to the head unit to view footage ? Not heard of BT or Wifi dash cams before, you deffo cant use BT on the unit for it, maybe you can use wifi if it just broadcasts an address no reason why the head unit couldnt pick it up,no sdcard or usb connection at all ?
[MTCD  Android Head Units Q&A] Bob_Sanders:
Bluetooth and obd2? Forget it.... too slow and painful. Get torque pro and run it through obd2

usb

. It's lightening fast and connects automatically

https://www.amazon.com/ScanTool-OBDLink-USB-Professional-Diagnostics/dp/B005ZWM0R4
[MTCD  Android Head Units Q&A] marchnz:
A real dongle - great call, second that!
[MTCD  Android Head Units Q&A] Bob_Sanders:
Yeah, Torque (pro) is set up to run on usb and it boots up FAST.

From engine start (head unit wake up), to all gauges showing and reading is about 8 to 10 seconds. No farting around with frigging bluetooth connections!
[MTCD  Android Head Units Q&A] typos1:
Totally agree, thats what I ve been doing for years, mostly when I ve told people on here theyve always picked the bluetooth route and made out that I m some sort of freak for using usb, so good to see someone else using usb too.

Its also more secure than BT.