[MTCD Android Head Units General] ChessSpider:
So I have this version; a userdebug android 9 of 20190401... Is that interesting (see screenshot)? If not, then I'll try and upgrade it with a later firmware.. [MENTION=5938625]emre33[/MENTION] Your firmware from below is not available. Can you please reupload? Tyvm

So, in case anyone was looking for another review; here is one:

I ordered this one: https://nl.aliexpress.com/item/32997865378.html for my Opel Corsa D. It took over a month to get here; the QA-check also suggests it was created about a month after my order. So that explains it of course. Unfortunately my firmware is outdated, as there are already versions available from May.

The only bug I noticed so far is an annoying one; after resuming from sleep the touch screen does not work anymore. I bypassed that issue by configuring the radio to turn off 30 seconds after ACC OFF. Fortunately the bootup time is really quick; I counted about 13 seconds at one time. Since then I added some apps and changed launcher, so its a bit slower now I think. But really good. With 4gig of RAM and a sufficiently quick CPU I'm not complaining about speed. With 32gig of Storage I can preload google maps and spotify songs :)

What probably would be worth complaining about is the screen though; it is quite clear the quality of the screen is lacking. It is very reflective, the backlight isnt great, the touchscreen works flaky around the edges of the screen and the resolution (1036x600 or something) is too low for my taste. This is a 6/10 tbh; its fair and doable. Nothing more. AFAIK the screen has been the same for years, so there should be no surprises here.

Audio quality is noticeably better than the old Opel CD30-radio. It can also go less loud; unless you're willing to go to the equalizer and set all bars to +9dB and lose the sound quality again. I'm definitely considering looking into getting a separate amplifier.

EDIT: So I am an impatient man and upgraded my firmware with the latest HA-version. I downloaded this from the following URL: https://yadi.sk/d/umCvHqCDzHccr/RockChip PX6 Android 9/HA (Thanks [MENTION=456516]typos1[/MENTION] !). The bug with touchscreen and time are now fixed. No issues. Next up Im going to install a heatsink.

EDIT: Heatsink installed, no fan lol. Temperature at idle now at ~37 degrees. I ordered this one: AAB Cooling NB Cooler 1 with some cheap thermal glue (not paste). So far the glue works; i hope it doesnt let go :). WHen running antatu benchmark, it first stayed a bit at 60 degrees and then it rose further to a maximum temperature of 74 degrees. In the final seconds it rose to 82 degrees. An antatu benchmark is 15 minutes. Of course, because there is no airflow, at some point the heatsink is also hot and saturated. But for google maps on a cartrip this should be ok. Antatu benchmark score: 82222 (see attachments for proof)

EDIT 10/2019: So, i think there should be enough room to install 2 of the heatsink next to eachother. Might be a good idea, as even w/ just spotify+google maps it heats up to 75 degrees after ~1hr

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Tips & Tricks

I was missing a nice overview of tips and tricks, so here's a list of what I gathered.

Useful apps

Check here: https://xdaforums.com/showpost.php?p=71453243&postcount=5

Access hidden menu's

Go to Settings --> Car --> Factory Settings.

You will be asked for password. Multiple possibilities:

126: Enter specific factory settings about car, e.g. the app, car logo, radio, voice, canbus, keystudy (for changing purpose of keys on the headunit) and other settings (enable frontcamera, etc)

adbon: Enable ADB, and consequently also enables developer options

adboff: Disabled ADB again

More passwords can be found here: https://xdaforums.com/showpost.php?p=71455277&postcount=11

Enable voltage in statusbar

Per request on YouTube. Settings -> Car -> Extra Settings -> Battery Voltage Display

Synchronize contacts to headunit

You have to install two applications: Contacts and Android Contact Sync. Of the latter, you will have to install 4.x. The most recent one is https://www.apkmirror.com/apk/googl...c/google-contacts-sync-4-4-4-1227136-release/

Call contacts per voice

First, synchronize contacts to headunit or it will not work. Then, install MtcDialer: https://github.com/scorillo/MtcDialer/releases

Easy internet for headunit

I downloaded Tasker on my phone. Whenever it connects via Bluetooth to the Car, it automatically enables the wifi hotspot. The car will automatically connect. Upon Bluetooth disconnect, it will disable hotspot and re-enable WiFi again.

Update to newer version

In general, all px6 should be compatible. Thus it doesn't matter of which vendor you install Android because the firmware is the same. However, all updates are always on your own risk.

Updating is easypeasy; all you need is USB flashdrive or sdcard. Dont fly through the steps, you have to make a backup of existing settings before you update!

1. Go to https://yadi.sk/d/umCvHqCDzHccr/RockChip PX6 Android 9 and choose a vendor (I used ha, other people prefer mx. I think mx has two apps side-by-side support)

2. Download an android version. Filesize should be approximately 800mb big and called 'update.zip'.

3. Put the update.zip on the storage device and attach it to the headunit. DO NOT YET UPDATE

4. First, create an update of MCU settings of your specific car. Go to the 126 menu (refer to "Access hidden menu's" above) (do not update android!) and click the export button. Make sure the resulting export-file ("dmcu.cfg") ends up on your storage device. You might want to make screenshots of every page there, just to be sure.

5. Then, finally, you may update android. Go to Settings -> System -> System updates (at the bottom). It will ask you if you want to update from android.zip. Say yes, and it will upgrade. You will lose settings and apps in the progress (yes you want to wipe). It will take about 10 minutes.

6. Finally, after it has successfully updated, it will ask you if you want to recover ("update config") from the dmcu.cfg. Do that. If it doesnt ask you, enter the 126-menu again and click the import button. If you didnt backup dmcu.cfg, well, good luck.