yashsingh1/xdaforums huggingface dataset:
[MTCD Hardware Development] marchnz:
Did you want me to look at the schematic and make a best guess from the pictures you have provided?
[MTCD Hardware Development] didu73:
I accept any help. I'm not very good at electronics. I can only follow the Step by Step descriptions.

The RF-210 module not yet arrived from China

Thank you for your help!
[MTCD Hardware Development] Angelor1:
Mod Translation

hello if it can be useful this newly arrived dongle works perfectly with my wonderfoo px5 unit. among the options you have to select the wq6 module .wi fi much better performance and clear calls. optimal.

Original

ciao se può essere utile questo dongle appena arrivato funziona perfettamente con la mia unità wonderfoo px5. tra le opzioni devi selezionare il modulo wq6 .wi fi molto più performante e chiamate chiare. ottimale

Adattatore WiFi BT EDUP USB, adattatore di rete wireless nano USB per laptop, dongle Wi-Fi per PC desktop compatibile con Windows 10/7/8 / 8.1 / XP Mac OS X 10.6-10.15.3 : Amazon.it: Informatica

Adattatore WiFi BT EDUP USB, adattatore di rete wireless nano USB per laptop, dongle Wi-Fi per PC desktop compatibile con Windows 10/7/8 / 8.1 / XP Mac OS X 10.6-10.15.3 : Amazon.it: Informatica

www.amazon.it
[MTCD Hardware Development] SiMo1552:
Is it working with android 10?
[MTCD Hardware Development] Angelor1:
Yes
[MTCD Hardware Development] SiMo1552:
This is a good news for who having Md725 and want to upgrade to android 10. Thanks
[MTCD Hardware Development] maxiauer:
@Angelor1 Does it registers with your phone as a Headset + Call Control device? (can you originate and control calls form your HeadUnit?)

Also, for wifi, does the HU uses this adapter or the original one?

In Amazon, it looks more like a BT adapter to connect BT headsets to your computer... It is available on US also.

The manufacturer describes the product HERE . They claim Android Compatibility up to 8.x...but they might have forgotten to update this Alibaba page after launching their BT 5.0 device. That one seems NOT compatible with Android.

Max
[MTCD Hardware Development] tw39515:
I Ordered this to try it will be here tomorrow. It looks the same as the one listed above.https://www.amazon.com/gp/product/B0899K77QJ/ but now looking at the overseas amazon link has 2 different adapters one with antenna and one without.

@Angelor1 which adapter did you get with or without external antennae.
[MTCD Hardware Development] maxiauer:
Be careful. The one you ordered does not look like the one (without antenna) in Amazon Italy. Also, the one you ordered is based on RTL8723BU and in the notes it specifically says No Linux/Android support

The closest one to the original post that I found is the one WITH antena (Here) and is based on Realtek 8821CU and has no warning about NO Linux/Android support (but it neither confirms android support). Some people in Q&A said it works with Linix
[MTCD Hardware Development] tw39515:
it was 12.00 with prime, if it doesn't work i have a use for it. hopefully @Angelor1 can post a pic of his to confirm. also the md-725 is based off RTL8723BU. so fingers crossed.
[MTCD Hardware Development] Angelor1:
I confirm that it works. I have on the radio the phone features. I suppose the wi fi works too because if I unplug the adapter it disconnects. I hope to take some pictures tonight. I confirm it is based on rtl8723bu
[MTCD Hardware Development] marchnz:
Confirm what works and what is working?
[MTCD Hardware Development] Angelor1:
guys sorry maybe the English translation does not make it much. the device works perfectly both wi fi and bluetooth. it connects immediately as soon as the key is turned. I hope it is the same for you.
[MTCD Hardware Development] tw39515:
is the bluetooth setting in factory settings determined by mcu or what version android you are running. i dont see an option for wq6 on android 9.
[MTCD Hardware Development] Angelor1:
Wq_bc6 scusa
[MTCD Hardware Development] Angelor1:
here is the phonebook of the phone and the a2dp application that plays music from the mobile phone
[MTCD Hardware Development] SiMo1552:
Hi all, I hope someone can help me to install RF210 BT.

I have exactly same this Klyde motherboard, it have both 10 and 11 bin.

After checking on internet I found this picture with module on 11bin connector but not sure if it a Bluetooth or not.
[MTCD Hardware Development] SiMo1552:
I just tried the usb dongle today with android 10 and it doesn't work
[MTCD Hardware Development] darealown:
Can confirm this. Wifi works over the usb dongle. Tried a lot, but no luck with the bluetooth. Tried every availaible option in factory settings.
[MTCD Hardware Development] Angelor1:
I'm sorry. I don't understand how it's possible that some work and some don't.
[MTCD Hardware Development] marchnz:
These experience reports are good to know, but without posting details of the unit have, the factory BT module, and the factory settings for BT, they remain a guessing game.

If we want to figure out what works vs what does not, details are needed.
[MTCD Hardware Development] p4tgb:
It seems, from all the information i have collected, with no certainty,

that the chip module version inside the usb must be GOC-MD-725 V2.4 to be able to work in android >= 8.

So I guess it's pure luck

or the latest manufactured usb's is more probable to have the latest chip version inside?

I don't know.
[MTCD Hardware Development] maxiauer:
(y)

It would be nice to know (for both, working and not working)

- Unit type (PX5/6/30 and manufacturer) (on Settings)

- Version of Firmware (again, check settings)

- Version of OS (factory/Hal9k/...) (shouldn't be so relevant, but just in case)

- Factory Settings used for BT

- Link to the module (to make sure we are talking about the same one)

Thanks!!!

Max
[MTCD Hardware Development] darealown:
I ordered both available options from the given amazon link.

Yesterday i tried the ‎EP-8568 for all factory settings, the ‎FRG002 i tried only with wq_sc6. No success, but i will try a bit more at the next weekend.

- Unit type PX6

- Version of Firmware :

1. Build-number: rk3399-userdebug 10 QQ2A.200305.004.A1 eng.hct2.20210311.174916 test-keys

2. MCU-Version: MTCE_KGL_V3.10sp_1

- Hal9k 5.0.1 with Android 10

- Factory Settings used: tried all

- EP-8568
[MTCD Hardware Development] darealown:
Small update: model FRG002 on amazon seems to be EP-AC1661 (https://www.alibaba.com/product-det...offerlist.normal_offer.d_title.33b7165a5dITf5)

Tried it for the last two hours, no success. Not even the LED is on.

Would be really nice to get a bit more information on your setup @Angelor1
[MTCD Hardware Development] abdelmonem:
Hello sorry I was not online long time, if you see all pictures I attached I didn’t say you have to keep old module you have to remove it also rf210 is not compatible with android 8 version .
[MTCD Hardware Development] abdelmonem:
Hello can you take picture for the other side and old module please
[MTCD Hardware Development] CobK1ll3r:
Hello !

I have a px5 with the gs mainboard.

Have Android 10 installed from Hal9k.

Unfortunately, since I have the MD725V1Chip, the Bluetooth does not work.

Got me a RF210 from AliExpress and soldered it in.

Factory settings on WQ_RF210 and the Bluetooth worked so far.

I have not removed MD725.

Now I have the problem that the microphone is very bad.

Crackle, rustle and very quiet.

Have also used an external one (via the adapter in the back).

A2DP and voice are good.
[MTCD Hardware Development] rubiojose1:
Hello, this board seems to be the same as CobK1ll3r, can I put the RF210 module?

My board has 11 pins and the module has 10, in case it's worth it where do I start soldering?

Hola, esta placa parece ser la misma que CobK1ll3r, ¿puedo poner el módulo RF210?

Mi placa tiene 11 pines y el módulo tiene 10, en caso de que valga la pena ¿dónde empiezo a soldar?
[MTCD Hardware Development] abdelmonem:
Hello

After test RF 210 is not compatible with your motherboard I try it with same one and I get issues , I was have olde module I removed from csn2 mcu MD 705 it’s same MD 725 working fine when I test it in same motherboard with 11 bin but I’m not sure it’s available in Chinese market it’s 10 bin also but you have first bin are canceled ,so you can search for this module will work fine with you also change it from factory settings to bc6.

Note: don’t remove old module is attached with wireless.
[MTCD Hardware Development] marchnz:
Csn2 is NOT MTCD. Wrong forum. FFS know what you own people.
[MTCD Hardware Development] abdelmonem:
I was talking about BT module just see what I write good
[MTCD Hardware Development] abdelmonem:
If you see my previous comments you will see that I try Bluetooth module in deferent platform just to help others and already I try it in MTCD,MTCE,CSN2 etc

last test when @SiMo1552 visit me and we solve problem in MTCE motherboard 11 bin model with MD705 it was removed from CSN2 platform device I hope this will help people
[MTCD Hardware Development] SiMo1552:
I confirm that RF210 doesn't work with 11pin motherboard #67. It is recognized on android 9 and 10, but for both versions the phone calls didn't work as I couldn't hear anything neither the call receiver. I would like to thank @abdelmonem who solve this issue by changing the Bluetooth module.
[MTCD Hardware Development] Phil_Barker:
I'm having problems with Wifi connecting to my IOS15 hotspot since upgrading to 10 on my PX5 machine

Someone pointed me in the direction of this thread and said that somehow it's related to my BT4 module

Bluetooth also seems to connect calls but there's no audio or mic working since the upgrade

I have an MD705 BT chip in my headunit, looking at it, it's 10 pins soldered in so am I right in thinking this will just be a straight swap of desoldering the old board and soldering in the aliexpress RF210 board?

Thanks
[MTCD Hardware Development] rubiojose1:
Mod edit - translate by https://www.deepl.com/translator:

Thank you for your reply.

Could you tell me the name of the bluetooth module so I can try to find it myself?

*****************************

Gracias por la respuesta.

¿Podría decirme el nombre del módulo bluetooth para tratar de encontrarlo yo mismo?
[MTCD Hardware Development] Oswald Boelcke:
@rubiojose1

As courtesy, I've translated your post above. With reference to rule no. 4 of the XDA Forum Rules, please post in English or add at least an English translation to your Spanish post. Thanks for your cooperation!

Spoiler content hidden.
[MTCD Hardware Development] abdelmonem:
As I said before after test MD705 it’s working in android 9 or 10 than no need to change it ,after upgrade in factory settings use bc6 that’s how it will work again with you
[MTCD Hardware Development] abdelmonem:
And I do this just for help , I see almost all Bluetooth module from many deferent platforms ,I get all are same ,swapping from any platform to other without problems
[MTCD Hardware Development] Phil_Barker:
It's sort of working. I can connect to my phone (IOS 15) but when I answer calls there is no audio.

I also can't tether to the phones wifi hotspot anymore and a few people on another thread said it's because the MD705 is BT4 and that I should change this to a BT5 module

I've already changed factory settings to SD-BC6 but no audio :(
[MTCD Hardware Development] abdelmonem:
Ok you can try RF 210 in case you have Bluetooth module separately not like other module that have wireless is attached with Bluetooth in same chipset

other reason to getting problems with MD705 if module have old firmware before 2017
[MTCD Hardware Development] abdelmonem:
for who have wireless is attached with Bluetooth in same chipset ,you can use this module if RF210 not working

https://www.aliexpress.com/item/32853628337.html?spm=a2g0o.productlist.0.0.638d3482rN0YE4&algo_pvid=ea40d3de-dc81-4ce2-b11d-bd9a73ee51ff&algo_exp_id=ea40d3de-dc81-4ce2-b11d-bd9a73ee51ff-0&pdp_ext_f=%7B%22sku_id%22%3A%2265226599566%22%7D
[MTCD Hardware Development] rubiojose1:
This module does not have firmware, would it be necessary to put it to work?
[MTCD Hardware Development] abdelmonem:
I don’t know about Chinese when they explain something the original manufacture is not supported this module anymore but it will not have firmware at all I don’t think so ,need to test it ,I’ll try to order and test it
[MTCD Hardware Development] didu73:
I was successfully replaced Md725 to RF210 BT module. RF210 works well in Android 9 . I haven't upgraded to android 10 yet. This description helped ! The motherboard little different for me. Connector 3 is below the Som (core board). Enough that only connect RX, TX, 5v, Gnd.

Source: Blackman68

This site
[MTCD Hardware Development] marchnz:
Thanks for the post. Basically only the RX, TX, +5 and ground are used as you found out.
[MTCD Hardware Development] darkspeed666:
I ordered for a while this module...

My MB is an HA-Sofia and I see 3 pins near the connector and they might be RX TX GND.

Does someone has the PX5 Pinout ? Or it's the MTCD schematic page10 "HYB18M512160AF_0" BT_RX and BT_TX ?

Next is to find a way to get the MIC IN directly to the module... (MIC+ MIC-).

... hope my module will be there soon...
[MTCD Hardware Development] Angelor1:
https://xdaforums.com/t/bluetooth-usb-dongle.3684383/

here we talk about the comfast dongle. for many it worked
[MTCD Hardware Development] Angelor1:
now a strange thing happens: if I unplug the dongle, the bluetooth continues to work while the wi fi no longer works. It used to be the other way around 🙄
[MTCD Hardware Development] rubiojose1:
Hi, does anyone know where this board can have the RX and TX connections?
[MTCD Hardware Development] marchnz:
Check Schematic.
[MTCD Hardware Development] rubiojose1:
I don't have any scheme
[MTCD Hardware Development] marchnz:
Check my sig
[MTCD Hardware Development] finfet:
Did you use the two connections with the red dots? which one is rx and tx?

Thanks
[MTCD Hardware Development] didu73:
I do not know which one RX, TX. I was lucky at first. Poor connection is not a problem. If not exist BT. Change the RX, TX connection on the BT card.
[MTCD Hardware Development] finfet:
I see from the schematic uploaded by marchnz that the pin 26 is rx, the one with 4 red dots, and the pin 27 is tx, the one with 2 red dots.
[MTCD Hardware Development] me.how:
Guys! I've just soldered RF10 into my old PX5 (GS) and upgraded software from old android 6 into android 10 Hal9k (needed since there was no rf210 option in android 6)

Everything works excellent!!

- Wifi signal is much better now and finally i can connect and use a wifi in my garage (still on old md725)

- bluetooth is on rf210, there is no echo! At last! BT OBD adapter is connecting!!

- android 10 is so much faster and better optimized. Finally i can use google maps

After almost 5 years all issues with the device was solved.

Thank you guys. :)

You are the best! Im so happy!
[MTCD Hardware Development] rubiojose1:
I have everything connected according to the scheme, everything works but the audio of the calls is not heard
[MTCD Hardware Development] elmanoduarte:
My PX5 board unit its exaclty like Psychotonikum shows, and the Module looks like it to.

Next time I hoppen it I wll picture and see what module its there. But the Pins look the same, just dont remember the antenna on the module!
[MTCD Hardware Development] elmanoduarte:
A hell of a soldering :) good job, what is need its WORK :)
[MTCD Hardware Development] Shadow128:
Hi there

Last week I ordered an apparently identical adapter from Amazon in Germany and tested it today (EP-8568 from EDUP).

Unfortunately, the adapter is not recognized with Android 10, no matter which driver I load in the MCU settings.

When I use lsusb to display the connected USB devices, I get 0bda:b720 for the adapter, which according to Google is an RTL8723BU chipset. So the same one that is installed onboard.

Is there any way to use this adapter anyway?

Or are there other adapters which are working with Android 10?
[MTCD Hardware Development] marchnz:
It won't work without internal disconnected.

I dont know what others have been doing, perhaps their internal has failed.
[MTCD Hardware Development] Shadow128:
Hm, really?

I thought the others plugged in only the USB BT Adapter and it was working?

But... Another problem could be the same RTL chip onboard and the adapter?
[MTCD Hardware Development] michelraugh2:
O great that's a good news, thanks for informing
[MTCD Hardware Development] maxiauer:
As far as I remember, "otherS" were actually only @Angelor1, who unfortunately never reported back with a clear description of what he did and the details of his setup (which board manufacturer, MCU SW...). I was able to get a dongle like the one he had (same chinese source, "looked like" the same) and in my case it did not work out, after testing all possible configurations. BUT, I had to return it and I was not able to do the test with the on-board BT/WIFI chip removed.

I saw in other threads a few guys claiming it worked for them, after removing the original BT chip. Unfortunately those post did not provide info on what specific board they had (even on PX5 MTC-D family, there are multiple motherboards with different BT connections)
[MTCD Hardware Development] maxiauer:
Hi @didu73

Have you upgraded already to Android 10? Does it work OK?

Seems our boards are similar (mine is an old one labeled "HA-SOFIA" even if it is a HA PX5) and I do see the 3 connectors. If this works in Android 10, I will disassemble it and check the circuit to see if in my board the connector is really BT-related or at least connected to the bus of the MCU

Have you noticed any issue with your solution?

Thanks !!!
[MTCD Hardware Development] didu73:
Yes I upgrade A10 hal9k mod v5. Bt work fine.
[MTCD Hardware Development] ionio-zante:
Received my upgrade parts to give life to my old Xtrons px5...

CoreBoard replaced from PX5 2GB to PX6 4GB and Bluetooth from SD968 to RF210.

Also installed Alex's heatsink with a low rpm fan.

Everything installed and works perfect. Very glad with the result as my device is way more faster and the Bt connection with new module is has better sound quality and never lost communication. (the old SD968 although it is working with the old drivers on android 10 occasionality loses connection and sound quality is bad)
[MTCD Hardware Development] Shadow128:
OK, then I misunderstooded the posting :(

Removing the WiFi/BT Chip should be no problem, as it is only soldered with 7 pins (or maybe there are some more under the board?).

Next problem could be still the adapter. If there's also a rtl8723bu chipset, then the same error could happen. And for WiFi I need another adapter?
[MTCD Hardware Development] maxiauer:
Are you sure you do not have a row of holes in the board or the 3 holes next to the CPU Daughter-board connector?

Soldering a BT-Only board there seems to be the only really confirmed solution...
[MTCD Hardware Development] Shadow128:
Attached a photo of the board. I searched yesterday, and I found a found which looks similar with three or four soldering pads on the bottom side
[MTCD Hardware Development] timolen:
Hello! I have a XRC mcu PX5 board with md725. I've managed to order the rf210 module and soldered it to the bord in j11 slot, and it doesn't seem to work, at least in android 9. I changed in car setting the bt to rf210, but I cannot find any device over Bluetooth on Android 9. Did not manage to upgrade to 10 yet, but I'm assuming it should work on 9.

It was soldered as in the example image. Was it the wrong way? I couldn't figure it out in the schematics.
[MTCD Hardware Development] marchnz:
Do you have +5v and grnd at the indicated points.
[MTCD Hardware Development] timolen:
I'm not sure, as it does not write on the board. How can I find out?

Added more fresh images. Measured with a multimeter the 5v and gnd and i had no values. Not sure if it's right though.
[MTCD Hardware Development] McIber:
Hello! I have a KGL-6188-MAIN1-V8.1 PX5 board with md725 type1 but it does not have the 10 pin connector for rf210.

I can not identify either Rx, Tx and power pins to solder it. Is it possible to do it somehow? If it is possible I will buy the module.

Thank you!
[MTCD Hardware Development] abagos:
Would it be possible to disable/blacklist a specific USB device in Android? Something similar to udev in Linux? So the unit will "ignore" the internal device.
[MTCD Hardware Development] marchnz:
Might be
[MTCD Hardware Development] McIber:
I have just received RF210 BT module. Any help to locate Rx and Tx pins in my board would be appereciated. I do not know where to find the schematics...
[MTCD Hardware Development] henri_p:
On the SoM to board connector locate pin 26 (TX) and pin 29 (RX) use 5V from anywhere on the board
[MTCD Hardware Development] serboon:
26-TX 27-RX

Hello, my bluetooth RF 210 does not work correctly on my KGL, in particular, the music from the phone goes in mono, but the phone, the interlocutor hears me, I don’t hear him, the sound does not go to the speakers.
[MTCD Hardware Development] marchnz:
Off topic, this thread is for changing BT to RF 210.

The screen shot does not show an RF 210, that could be the first problem.....
[MTCD Hardware Development] serboon:
BT-RF210 is present on this HU, it is soldered from the bottom of the board, but I do not use it, as I described above, it does not work correctly...
[MTCD Hardware Development] abagos:
Installed the RF210 board on a KBT unit, which had the three holes next to the cpu daughter-board connector. Took 5V and GND directly from the two holes that power the whole unit. Everything works very well!
[MTCD Hardware Development] LiviuE:
Hi! Did you solve the problem? It seems that we have the same board...
[MTCD Hardware Development] serboon:
Hello, did you see the name of the device CAR-KIT and the password 0000 in the bluetooth menu of the device? If not, then maybe you mixed up TX with RX, the RF 210 module works on Android 9
[MTCD Hardware Development] LiviuE:
I don't soldered the module... i just searching for some information and I hope to help me someone 🙂
[MTCD Hardware Development] timolen:
Are you saying that it should work by just soldering it in the empty spot? Because I did and it didn't work. tried placing it both ways.
[MTCD Hardware Development] serboon:
I will describe what I did with my HU PX3 MCU KGL MTCD Android 5.1.1, after upgrading it became PX5 MCU KGL MTCE Android 10, of course, after the upgrade, the bluetooth module stopped working because the HU had a BT-MD725 (Type 2) chip, and it as you know, it’s not friendly with 8 and later editions of Android, in order for me to get bluetooth working, I purchased the BT-RF210 module and installed it in the HU by soldering 4 wires to it, + 5V and -5v I took from the MCU board, and the TX wires (26) and RX (27) I soldered to the android board, the photo is attached, then you need to go to the HU engineering menu and in the BT settings replace BT-MD725 with BT-RF210, save this configuration, the HU will reboot and should work bluetooth, I have after my manipulations, the bluetooth did not fully work, that is, the smartphone connected to it without problems, but did not fully work, that is, the music from the smartphone on BT A2DP was played in mono mode, and the calls did not work fully, the interlocutor heard me, I did not, the sound did not go to the speakers, as it turned out, this is most likely a software defect failure of the MCU KGL, later thanks to the user McIber, from this forum I learned that the MCU KGL and MCU HA are interchangeable, by installing MCU MTCE_HA_V3.78 on my HU I got a fully working bluetooth, the only thing I needed was to retrain the physical buttons on the HU.

It is important to correctly solder the wires to pins 26 and 27, and not to pins 22 and 23, as I had with my first BT-RF210 module, after turning it on I got a faulty module.
[MTCD Hardware Development] marchnz:
Great write up. Installing a known working MCU as well was taking a perfect initiative.
[MTCD Hardware Development] LiviuE:
Hi. I've did everything as you said and it's work but now I have same problem as you... the interlocutor heard me but I don't hear anything. The problem is that I have MCU MTCE_XRC_V3.01bd_1... I don't have MCU KGL or MCU HA. Can I install MCU MTCE_HA_V3.78 or I will brick the HU?