Develop Bugs

[Q] Bluetooth Not working

Hi Forumers,
I've just bought the t800.
After a couple of days I've tried to use the bluetooth and oddly it cant find anything.
I've made sure I've got a few bluetooth items on in the room, and my phone and laptop can find them but my Tablet cant.
But, my phone was able to find the tablet and the two paired that way.
But since my tablet cant find my bluetooth speaker, its a tad rubbish..
Any ideas on how to fix?
Thanks in advance

I have a Bluetooth speaker and sometimes I have to restart the speaker or forget the speaker in order to connect to it.I would suggest (on your tab s) going into the bluetooth setting and check, make device visable to other devices. Hope this helps.
Sent from my SM-T800 using Tapatalk

okey dokey,
So Ive restarted my speaker, laptop phone and stereo bluetooth receiver, and nothing is showing to the tablet, so it seems not to be that.
the tablet is visible to my phone, so that part works.
but my tablet cant see anything.
Plan B?

kuztardd said:
okey dokey,
So Ive restarted my speaker, laptop phone and stereo bluetooth receiver, and nothing is showing to the tablet, so it seems not to be that.
the tablet is visible to my phone, so that part works.
but my tablet cant see anything.
Plan B?
Click to expand...
Click to collapse
Might try a factory reset. Right after I bought my T800 the wifi greyed out and refused to work. Did a reset and all was fine again.

Argh, I had just spent hours installing stuff.. but seems it may be the only answer!
Bu99er! :-/
Should I do anything special before a hard reset?

kuztardd said:
Argh, I had just spent hours installing stuff.. but seems it may be the only answer!
Bu99er! :-/
Should I do anything special before a hard reset?
Click to expand...
Click to collapse
I wouldn't, but I never keep anything on my tablet of importance.

I brought the tablet to work so I could sort it out in work hours.
I was in the process of hitting the reset button and paused, and decided to try once more..
and now it works.
not sure what happened over night to make it work.. odd!?

kuztardd said:
I brought the tablet to work so I could sort it out in work hours.
I was in the process of hitting the reset button and paused, and decided to try once more..
and now it works.
not sure what happened over night to make it work.. odd!?
Click to expand...
Click to collapse
...and we all lived happily ever after.

T805 Bluetooth not works
Hi to all
I bouth some days ago a tab s 10.5 and in the first days the bluetooth works, but now I cannot activate.
I have already done a factory reset but nothing happened, so it does not works.
can anyone help me?tab is rooted
thanks
Giorgio

Volume button + WiFi Problems + Touchscreen no reaction + Board computer problems

I have some questions. (Copy from the old thread)
1. I mean that i read it here, but I'm not sure. At the moment I have very often the bug, that the volume button not works. Mute works, but louder and quieter not. I don't know when it doesn't work, but after a while no function.
2. Since a few days I have the wifi problem, that wifi works sometimes and after a while too, it shows empty bars and shows the connection but it doesn't work. In other case if I start the radio he can't find any WiFi. Why?
3. Since a few days the touchscreen doesn't work. I have set, that i can See if i touch. Then it shows a point. so i can see that the touch works, but there is no reaction. After a minuten the radio shows the bootlogo and have a loop. So i have start the radio new with reset or power off from the car.
4. Since a few days if i turn off the key normally all lights form the radio and display shut down. Additionally board computer shut down too after a few seconds. Now the light from the dvd tray is on and board computer too (after a lock from the car too). I dont know why but I don't know if that is so good (Battery).
All this errors are since a few days. I tried to do any settings but the problem is always here. Does anyone no about that? I think it's an app, but I don't know which one. The last chance (if I get no solutions) is to install another rom? That is really crazy, because it's only since a few days. The days before it works perfect.
I have JY 2.73 with the Malaysk Rom from September (1024).
Thanks

Update: Now i installed 2.59 JY and tried again. WiFi will always gone with no bars. So i turn off and turn on again. At the most cases it works. But the problem is here again. The same with the touchscreen crash. 3G doesn't work. always no bars.
So the previous MCU doesn't work again. Maybe a software error.

Could you please try to measure the voltage alignedto the HU while you encounter those problems? I rellay mean at the radio side (so not at the battery poles).
Such issues could be lack of voltage. If not and flashing does not solve it could be a defective unit.
Just to ensure: You flashed Firmware AND MCU? AM I right wit this assumption?
If not: Try to flash a new ROM first (probably try Malaysk ROM)
Btw: Moved to Q&A

dark alex said:
Could you please try to measure the voltage alignedto the HU while you encounter those problems? I rellay mean at the radio side (so not at the battery poles).
Such issues could be lack of voltage. If not and flashing does not solve it could be a defective unit.
Just to ensure: You flashed Firmware AND MCU? AM I right wit this assumption?
If not: Try to flash a new ROM first (probably try Malaysk ROM)
Btw: Moved to Q&A
Click to expand...
Click to collapse
Thx for answer. How can i measure that? Do you know which cable it is? And if the cable shows not the 12V? What can i do to fix the problem?
Sure. I have Malaysk Rom and the MCU JY 2.59.

you would have to get amulti- or vooltmeter and attach that between plus and ground pins at your HU.
If you don't know how you should eigther try to follow another way first if possible or ask someone to do it for you (it's electrics)

dark alex said:
you would have to get amulti- or vooltmeter and attach that between plus and ground pins at your HU.
If you don't know how you should eigther try to follow another way first if possible or ask someone to do it for you (it's electrics)
Click to expand...
Click to collapse
Thanks. I ordered a multilmeter. Maybe it's the battery. At the moment the car works really hard if I start it. The radio takes so much battery but the radio is off. So that can be the problem.

low voltage can cause many weird problems but you have to know a new battery might not solve your problem!
If you have low voltag while the engine is ruunning then you have a different problem. eighter there is a connection issue somewhere on the path the energy takes from battery and generator to the HU or your generator might have a problem. But that is open to check when we know if it really is a voltage issue.

Hi,
i'd like to give you an update for my problems. Since the last days I have the problems, that my car didn't start. Now we see, that the battery is nine years old. Now I charged the battery (tomorrow I'll get a new battery) and the first test shows WiFi works for 3 minutes. I know - that's not a lot, but I only can try if I have the new battery. 3G doesn't work - always the same. But that's not so important for now.
At the moment I don't have the volume error. I will test it, If i have a longer car drive.
The problem with the touchscreen is actually. Since a few time, after few minutes the touchscreen is bricked and I see the points that i touch it, but I can't click anything. If I touch ten times, twenty times or often then radio shut down and shows the boot logo... forever... it doesn't boot again. So I have to make a hard reset.
And the last point with the light board computer and the light dvd slot after plug off the key is actually too. It don't shutdown the lights on the standby time from 10 minutes (set it to 10 minutes). I know now, that I can shutdown it completely if I press the volume button for 3 seconds. Than it's turn off. So it's a setting problem from the firmware?
Today I plug in the key - nothing. Radio doesn't start. So I looked behind the radio and saw, that one thin cable is not in the wiring harness and I can see the wires on the cable. So I tried to put it in the wiring harness again. I hope it works longer now. I wrote carjoying and ask for a new wiring harness. Maybe all problems will be fixed, If i have a new.

Hello again,
now I've got a solution for the wifi problem. I've tried to connected wifi - i Known that doesn't work only few seconds and after a few seconds it shows 0 bars on wifi... now I disconnected my 3g stick and LOOK it works... full bars, no losing connection. I connect 3g again and the same problem after a few seconds.
So th3 3g stick (E1750 from Huawei) makes some problem OR the usb cable?

Huawei E355 also not working. Same connection problems with malaysk rom MTCD
Any suggestions?

Wifi Not Enabled after Reboot - 12 Hour Time setting Resets After Reboot

Ok, I installed the new Joying 10.1" VW head unit in my car the other day, and it's working pretty good, however I'm having a couple of issues. I installed Malaysk's ROM onto it and still working through setting everything up the way I want it, but I'm having 2 issues I can't figure out, and they are driving me nuts.
Wifi: Whenever the unit reboots, the WiFi is disabled. I have to manually re-enable it every time.
12-Hour Time: Every time the unit reboots, the time reverts back to 24-hour time.
Anyone know what I can do to fix these issues? Getting rather annoying having to switch them every time the unit boots up.
Thanks

bwhite757 said:
Anyone know what I can do to fix these issues? Getting rather annoying having to switch them every time the unit boots up.
Thanks
Click to expand...
Click to collapse
Sounds like the 12+ and ACC connections are swapped.

Thanks for the reply, but the unit is switched on Via Can-Bus. There is no ACC wire. It powers on and off just fine when I start and shut off the car.

bwhite757 said:
Thanks for the reply, but the unit is switched on Via Can-Bus. There is no ACC wire. It powers on and off just fine when I start and shut off the car.
Click to expand...
Click to collapse
Then your 12+ is not constant.

Yep it is, verified with a volt meter, 12volt constant stays hot, even went out and checked after my car had been off for over an hour just to make sure... I shouldn't have said there is no ACC wire, ACC is supplied by the Can-Bus adapter.
As far as the wiring goes, I'm confident all of that is wired correctly. I used to install car stereos as a job for 5 years, and this is the 3rd head unit in this vehicle. I'm an Android enthusiast, and definitely know my way around the system, even though this is my 1st Android head unit I've dealt with.
The 12-Hour time issue was happening before I installed the ROM on it, but the WiFi issue didn't start until after I installed the ROM.

Ok, thats a puzzler then. My observations have been that wi-fi will turn off and 24 hour set every time power is lost on the 12+ line. It seems independent of rom used, would happen on the stock rom and on a older version of Malaysk's I'm currently using.

Well, for whatever reason today the settings never reverted back. I don't remember changing anything, but I did go through every single menu and sub menu in the settings section. Oh well, fingers crossed everything stays set, because this head unit is perfect for me now!

I have the same issue + no bluetooth. I have a YINUO 1024x600 Quad-Core RK3188 and it's doing the WIFI OFF, 24 HR, NO BT.

Default radio application

Hello All,
I have a mtcb unit. I connected to this unit first connection to battery, after 3 time auto end of battery I decided to connect to starter key. But this time radio forget stations. So how can I solve this issue?

taycel said:
Hello All,
I have a mtcb unit. I connected to this unit first connection to battery, after 3 time auto end of battery I decided to connect to starter key. But this time radio forget stations. So how can I solve this issue?
Click to expand...
Click to collapse
The unit has two power wires. One goes to permanent plus, the other to ACC (contact). Connect them correctly according to the diagram on the unit.

Problem with Hizpo radio

Good morning!
I have bought a Hizpo Android radio for my Mercedes Benz Vito w639 (2012). This car haven't got steering wheel or controller for the radio, so I installed it without canbus (as the seller told me) and connecting Illumination and ACC directly to the car, bypassing the canbus.
The thing is that It started working perfectly the first day, but after some time the radio started to do really weird things, like resetting alone or getting looped on the startup showing a black screen with backlight on. Sometimes it works again for 1 day and after that starts again to fail. Anyone knows what is happening? I tried to access the recovery mode for trying a wipe, but I don't know the proper combination of buttons (this radio doesn't have physical buttons, only a reset button).
I don't know if in this forum is allowed to post the link of the website where I bought the radio, but if it's possible just tell me and I paste it.
I have a video of what happens when the radio starts to fail, but I cannot link it already to the post cuz I have less than 10 posts :crying: If you need them for helping me just tell me and I will send you a PM!
Thx for your help!! :laugh:

Nithilgan said:
Good morning!
I have bought a Hizpo Android radio for my Mercedes Benz Vito w639 (2012). This car haven't got steering wheel or controller for the radio, so I installed it without canbus (as the seller told me) and connecting Illumination and ACC directly to the car, bypassing the canbus.
The thing is that It started working perfectly the first day, but after some time the radio started to do really weird things, like resetting alone or getting looped on the startup showing a black screen with backlight on. Sometimes it works again for 1 day and after that starts again to fail. Anyone knows what is happening? I tried to access the recovery mode for trying a wipe, but I don't know the proper combination of buttons (this radio doesn't have physical buttons, only a reset button).
I don't know if in this forum is allowed to post the link of the website where I bought the radio, but if it's possible just tell me and I paste it.
I have a video of what happens when the radio starts to fail, but I cannot link it already to the post cuz I have less than 10 posts :crying: If you need them for helping me just tell me and I will send you a PM!
Thx for your help!! :laugh:
Click to expand...
Click to collapse
What did the reseller suggest when you contacted them for support?

marchnz said:
What did the reseller suggest when you contacted them for support?
Click to expand...
Click to collapse
Nothing at all, He didn't answer my messages at this moment.

hello....I keep getting this error code: 001, does anybody has a solution?