[Android Head-Units] bryxer:
Hoping to share a bit of information on this low-end Chinese head-unit for VW vehicles. I bought it in Jan 2018 on Amazon.

Warning: This is for the adventurous to say the least. I had previously bought an earlier model which I had to return because ti wouldn't even boot. Support had said it was the firmware and sent me a replacement firmware to install which aborted during the update and then sent me the exact same file three more times saying they had fixed it.

This one boots and overall it runs but it is very far from what one would expect. Mine has no GPS working, for which I will open a separate thread, but just so you understand that if you buy this, better beware, if you did already, welcome aboard, and let's see what we can get out of this unit. :)

Manufacturer site here

Specs from manufacturer:

I've also seen the model listed as: CD-VW-ZZH-A

So, I don't have root, or even ADB access. To quote Flanders' parents: "You gotta help us, Doc. We've tried nothing and we're all out of ideas." :)

I've tapped repeatedly over the build number in device info and it does not enable developer mode. I've taken a few screenshots and installed a terminal app and extracted some very basic information which I am sharing here:

uname -a
Linux localhost 3.0.101+ #627 SMP PREEMPT Thu Aug 17 16:11:28 CST 2017 armv7l Android

id
uid=10101(u0_a101) gid=10101(u0_a101) groups=3003(inet),9997(everybody),50101(all_a101)

df
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 396640 512 396128 1% /dev
tmpfs 396640 0 396640 0% /mnt
/dev/block/mmcblk0p9 1749728 1503260 246468 86% /system
/dev/block/mmcblk0p6 129008 4204 124804 4% /cache
/dev/block/mmcblk0p7 16112 4136 11976 26% /metadata
/dev/block/mmcblk0p10 12788432 4896972 7891460 39% /data
/dev/fuse 12788432 4896972 7891460 39% /storage/emulated
/dev/fuse 31154688 28312032 2842656 91% /storage/external_sd
-- last one is a 32Gb mSD inserted in the only slot available, labeled "GPS"

various files from /proc
version
Linux version 3.0.101+ (rocky@hctr930) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #627 SMP PREEMPT Thu Aug 17 16:11:28 CST 2017

cpuinfo
Processor	: ARMv7 Processor rev 0 (v7l)
processor	: 0
BogoMIPS	: 2015.34

processor	: 1
BogoMIPS	: 2015.34

processor	: 2
BogoMIPS	: 2015.34

processor	: 3
BogoMIPS	: 2015.34

Features	: swp half thumb fastmult vfp edsp neon vfpv3
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x3
CPU part	: 0xc09
CPU revision	: 0

Hardware	: RK30board
Revision	: 0000
Serial	: 44010a321703180507e1fa5133504b52

meminfo
MemTotal: 1048576 kB
MemFree: 42468 kB
Buffers: 26392 kB
Cached: 375260 kB
SwapCached: 4052 kB
Active: 272684 kB
Inactive: 356712 kB
Active(anon): 90428 kB
Inactive(anon): 148084 kB
Active(file): 182256 kB
Inactive(file): 208628 kB
Unevictable: 2992 kB
Mlocked: 256 kB
HighTotal: 317440 kB
HighFree: 9644 kB
LowTotal: 475840 kB
LowFree: 32824 kB
SwapTotal: 196604 kB
SwapFree: 155348 kB
Dirty: 20 kB
Writeback: 0 kB
AnonPages: 229452 kB
Mapped: 113792 kB
Shmem: 8032 kB
Slab: 34548 kB
SReclaimable: 16344 kB
SUnreclaim: 18204 kB
KernelStack: 5616 kB
PageTables: 13752 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 593244 kB
Committed_AS: 19477200 kB
VmallocTotal: 516096 kB
VmallocUsed: 60312 kB
VmallocChunk: 374660 kB

partitions
major minor #blocks name

179 0 15388672 mmcblk0
179 1 4096 mmcblk0p1
179 2 24576 mmcblk0p2
179 3 12288 mmcblk0p3
179 4 32768 mmcblk0p4
179 5 65536 mmcblk0p5
179 6 131072 mmcblk0p6
179 7 16384 mmcblk0p7
179 8 4096 mmcblk0p8
179 9 2097152 mmcblk0p9
179 10 12992512 mmcblk0p10
253 0 196608 zram0
179 32 31166976 mmcblk1
179 33 31162880 mmcblk1p1

devices
Character devices:
1 mem
4 ttyS
5 /dev/tty
5 /dev/console
5 /dev/ptmx
10 misc
13 input
29 fb
81 video4linux
89 i2c
108 ppp
116 alsa
128 ptm
136 pts
180 usb
188 ttyUSB
189 usb_device
204 ttyV
216 rfcomm
249 goc_blue
250 roccat
251 BaseRemoteCtl
252 ttyGS
253 bsg
254 rtc

Block devices:
259 blkext
7 loop
8 sd
65 sd
66 sd
67 sd
68 sd
69 sd
70 sd
71 sd
128 sd
129 sd
130 sd
131 sd
132 sd
133 sd
134 sd
135 sd
179 mmc
253 zram
254 device-mapper

The music player app is really bad. I've started using VLC and it's fine but doesn't integrate with the launcher as the builtin app does. I will try replacing the launcher at some point and will post back.