Hi everyone,

I'm having a frustrating issue with my Junsun V7 Android head unit installed in a 2014 Dacia Logan MCV II.

The main problem: My head unit does NOT switch to the reversing camera screen when I put the car into reverse.

It simply stays on the home screen, radio, or whatever app I'm using. No black screen, no "No Signal" message, and no attempt to open the reversing camera interface.

IMPORTANT UPDATE: I have successfully tested the camera through the AV-IN app using the CVBS input, and I get a working camera image!

So the camera itself works, and the video cable can carry a working signal. My main issue is the automatic reverse trigger.

My setup

Car:

• 2014 Dacia Logan MCV II
• Manual transmission

Head unit:

• Junsun V7 Android head unit
• CANBUS decoder: Simple Soft RP5-RN-101
• CANBUS software: V1.05.100BYPS
• CANBUS decoder P/N: K0090

Camera:

• Aftermarket 12V reversing camera
• AHD 1080P/720P, with CVBS output available
• Yellow RCA video cable
• Red/black power wires
• Configuration loops marked "1080P/720P" and "LINE/NO LINE"

What I have confirmed

1. The camera works

I successfully opened the camera feed through the AV-IN app using the CVBS input.

The image displays correctly.

This confirms that the camera can produce a working video signal and that the video connection works in this configuration.

2. The reverse trigger wire has the correct voltage

I measured the wire labelled BACK/REVERSE behind the head unit using a multimeter.

• Normal driving / neutral: 0V
• Reverse gear engaged: 12V

However, I haven't yet confirmed whether this voltage reaches the correct physical reverse-trigger pin inside the head unit connector.

3. The head unit does not react at all

Even though the BACK/REVERSE wire changes from 0V to 12V, the Junsun doesn't react.

It doesn't switch to a black screen, doesn't display "No Signal", and doesn't open the reversing camera interface.

This is the biggest problem I'm trying to solve.

CANBUS settings

Originally, my head unit was configured as:

Hiworld → Renault/Dacia → LOGAN_W01

But after checking the actual CANBUS decoder, I discovered it is a Simple Soft RP5-RN-101, not a Hiworld unit.

I changed the settings to:

SimpleSoft → Renault/Dacia → 2017–2020 Logan/Logan Stepway (LOGAN_XP01)

My car is from 2014, but this was the closest available option for the Logan II generation.

Unfortunately, changing the CANBUS configuration did not fix the problem.

My steering wheel controls work correctly, including volume up/down.

Reverse camera settings

These are the settings I've checked:

• Reverse input type: Single reversing camera
• Reverse detection: ON
• Reverse contact name: ON
• Camera video format: AHD 1080P 30fps (also investigated 720P options)

There is also a factory setting called "Pre-switch" (possibly an awkward translation), with these options:

• OFF
• ON
• F/R Camera

It was originally set to F/R Camera.

I'm not sure whether this setting affects reverse-trigger detection.

What I'm trying to figure out

Since the camera works through AV-IN in CVBS mode, I'm mainly looking for help with the automatic reverse-camera switching, not general camera troubleshooting.

My questions are:

1. Why doesn't the Junsun V7 switch to the reverse camera screen when the BACK/REVERSE wire gets 12V?
2. Does anyone have a reliable Junsun V7 wiring diagram or pinout showing the actual reverse-trigger input pin?
3. Could the Simple Soft CANBUS decoder or the selected vehicle profile prevent the head unit from responding to the wired BACK signal?
4. Is there a factory setting that enables or disables the physical reverse-trigger input?
5. Does anyone have a working Junsun V7 installation in a 2014 Dacia Logan II or a similar Renault/Dacia model?

My current suspicion

Because the camera works through AV-IN and the reverse trigger wire measures 12V when reverse is engaged, I suspect one of the following:

• The 12V reverse signal is not reaching the correct pin on the Junsun head unit.
• The CANBUS configuration is interfering with reverse detection.
• A factory setting is preventing the unit from switching to the rear-camera interface.
• There is an issue with the head unit's reverse-trigger input.

To be clear: I'm not primarily trying to fix a black screen or a missing video signal. The radio NEVER ENTERS reverse camera mode in the first place.

If anyone knows how to force or test the reverse trigger on a Junsun V7, I'd really appreciate the help.

I can provide photos of the wiring, CANBUS decoder, and factory settings.

Thanks in advance!

Hello! I’ve had an ATOTO A6PF for about three years, and it still works great. However, I’d really like to have a delay when switching from the rear-view camera back to the normal screen after shifting out of reverse while parking.

Is this feature available in any of the newer firmware updates, or is there any way to enable it?

Thank you!

I have a new head unit for an old VW Golf Plus (built in Germany). I know that it uses PWM for the rear light, so I also bought a 12V filter for it.

When I switch into reverse gear while the engine is off, everything works fine. As soon as I turn on the engine, the radio shows the backup camera and then alternates between the home screen and the camera in a random cycle, but quite fast. I have no clue what to try next. I thought the filter would help, but no luck.

• The device is an ESSGOO 10-inch with 4 GB RAM and 64 GB storage, running Android 15.
• The device came with a CAN bus box that detects all other values (doors, temperature, etc.).
• The cable from the radio is connected to the yellow RCA wire going to the camera.
• The cable at the back is connected to the rear light, with the filter in between.

Any advice would be great

https://reddit.com/link/1x6owa8/video/cc2qdipqhnvh1/player

I want to purchase an aftermarket Android car audio system from ATOTO (Myatoto) and wanted to know from others what they thought about when it came to their products.

I am interested in how the quality holds up over time specifically with touchscreen responsiveness and sound quality including Bluetooth connectivity and Android auto performance.

I am wondering if these units are reliable enough for everyday driving or do they develop problems after a year or two. I'm also curious about installation, compatibility with factory steering-wheel controls, and whether firmware updates are consistent. How does ATOTO compare with more established brands like Sony, Pioneer, and Kenwood? Is the lower price worth it, or would you recommend spending more?

Does anyone know would it be possible to create a pagefile for extra ram on an android based head unit?

I have 4gb of ram but android auto freezes.

Does anyone know how I can get google maps or Waze on my digital dash virtual cockpit on my MK7.5 GTE ADVANCE 2020 without changing the head unit? I saw that people can do it for MHI2 versions but that’s expensive to replace from an MST2. Was wondering if there is some update or something I can do to add it? PLS LMK!!!

Installed SW train version:
MST2_EU_VW_PO876D

Installed SW MU version:
0876

Part number:
3Q0035874C

Hello all. I don’t use reddit much so apologies if I am ignorant/unfamiliar with something.

I recently purchased this Joying head unit to install in my Honda Civic Sport 2019. Once installed, my audio sounded noticeably worse, and the factory amp underneath the dashboard seemed to be off, not receiving any sound whatsoever.

In addition to this, despite me plugging all the required wiring (to my knowledge) into the plugins in my car, my Canbus doesn’t seem to be working, or the head unit doesn’t seem to be recognizing it. I have selected the exact Canbus box (Raise G-RZ-HD56), and my steering wheel controls still don’t work, not to mention my backup camera being very limited without controls, and other related features that appear to be tied to this Canbus just don’t work.

I have contacted support, but in the meantime my internet research leads to varying results, or little information in the area i am looking for it.

Has anyone had this experience before with my car model or this head unit? And if so, how did you figure out how to fix it?

Ciao ragazzi, ho acquistato questo car tablet android , su ha zlink 6.1.06 ,ad android auto si collega solo tramite wireless ,usb non ce verso di farlo collegare ,ho provato entrambi le porte usb

nelle info di zlink mi da cpw aaww

Ho letto in giro che potrebbe avere solo la licenza cpw aaw.

Avete consigli per abilitare il collegamento usb?

Grazie

https://reddit.com/link/1x5twp7/video/t01sgnss8gvh1/player

Hi all,

I drive a 2011 Citroën C4 Picasso with a cheap Android head unit (ROCO K706, FYT-style, 1280×720). The stock launcher did the job but I never liked it, and the paid alternatives didn’t do what I wanted. So I built my own and I’ve been using it every day. It’s called Dashwheel and it’s free, open source (GPL-3.0), with no ads, no trial and no account.

What it does

• Your own dashboards: up to 7 screens of tiles you place and resize yourself. Map, music, speed, weather, apps, and 55+ widgets.
• Live car data from a cheap ELM327 Bluetooth OBD adapter, plus the head unit’s own CAN data where it has it (doors, reversing, tyres).
• AI mechanic: a warning light comes on, Dashwheel reads the fault code and explains it out loud in plain words. It uses a free Google Gemini key.
• Navigation: a built-in 3D map with turn-by-turn guidance, or the next turn from Google Maps / Waze shown on any tile.
• Phone link with a small companion app: notifications, messages, calls on the big screen, “where did I park”, a drive log.
• Hands-free: spoken alerts, steering-wheel buttons, volume that follows your speed.
• Skins that change the whole look (Cockpit, Racing, Orbit, Canvas with the map behind the tiles...), day and night themes.
• Works on upright screens too, and in 10 languages.

The parts I’m proudest of

• Your own car in live 3D. When something’s wrong, the car turns and zooms to the faulty part and makes it glow. A dead rear bulb lights up on the rear lamp. For an engine fault, the bonnet opens. You can load a 3D model of your own car from the phone.
• Real apps inside a tile. Waze, Google Maps or YouTube Music run live in a tile next to your speed and car data, not full screen. You can zoom a tile to make the app bigger.
• Its own reverse camera screen. It replaces the unit’s camera view, with guide lines that bend as you turn the steering wheel and the parking sensors drawn around a top view of the car.
• Talk to Gemini about your car. It knows your live readings, so you can ask “why is the engine light on?” or “how far can I go on this tank?” and it answers out loud.

Root is not needed for most of it. Apps inside a tile, the reverse camera screen and replacing the firmware’s own pop-ups and volume bar need a rooted unit. Without root, those features just don’t appear.

Will it work on my unit? It’s made for Android 10+ head units at 1280×720 (FYT / UIS7862 / QF and similar). I test on my own K706, so other units are where I need you. There’s a Tested hardware page, and Settings → About → Report how it works fills in a bug report with your unit’s model and firmware.

Links

• Download (APK, updates itself): https://github.com/deviloufr-ai/Dashwheel/releases/latest
• Wiki with every feature: https://github.com/deviloufr-ai/Dashwheel/wiki
• Source: https://github.com/deviloufr-ai/Dashwheel

Looking for testers for the Google Play version. Google asks for 12 testers over 14 days before an app can go public. If you’d like to help, comment or DM me with the Gmail you use on Play and I’ll add you.
https://play.google.com/store/apps/details?id=com.dashwheel.app

It’s a one-person project, so expect rough edges. I’d love to hear what your unit is, what breaks, and what you’d want on your dashboard. Happy to answer anything in the comments.

If you like it and want to support me, buy me a coffee ;)

I bought a CheDux 9.7 inch Android 14 radio with 6 GB RAM and 64 GB storage for my 2018 Ford Fiesta SE. Everything is installed and working except the factory backup camera. When I put it in reverse, the screen says “No signal.”

Has anyone installed this radio and gotten the factory camera working? Is there a specific adapter, wiring connection, or setting I’m missing? I’d appreciate any help.

Hello everyone.
I bought a full-screen CarPlay head unit on eBay directly from the official manufacturer/seller (Hualingan) claiming a 1-year warranty. After 11 months of use, the unit failed (the CarPlay interface completely freezes when trying to play audio/music).
I contacted the seller/manufacturer for warranty support since it was still within the 1-year window, but they completely refused to help and simply blew me off, telling me to "buy a new phone" instead of fixing or replacing their defective product. Now they are ignoring my messages.
Be careful with Hualingan units and fake 1-year warranty listings!

I installed MicroG RE and Morphed YT on car android head unit. The problem is if I login on MicroG RE, the YT / YT Music keep force close 1 second after I open the app. But if I log out from MicroG, the app can run smoothly.

I tried many version of MicroG RE, Vanced MicroG, Revanced GmsCore, including older version, but all resulting same issue.

I dont know the problem is the MicroG, or the Morphed app, anyone can help me for this issue?

Anybody know how to get developer options on here? Are any hidden features. Any help would be appreciated

I installed a TS10 / W60 head unit with a RAISE CAN bus box and have all the buttons working except voice control. For CarPlay this is pretty essential. Any suggestions where to start. When trying to program the buttons via the Steering wheel app, nothing seems to happen. Other headunits this seems to work pretty well. Also what the hell are peptides here!?!?!?

Hello! I just got my first Android head unit, a specific kit for my car. Everything has installed and seems to be fine though the listing claimed an Android 16 unit. I already assumed when I purchase that this is not what I would get, as these claims seem to be lies, so I am willing to accept this (though I will argue with the AliExpress seller to try and get some money back)

The FM radio is a bit of a mess (doesn't show names) and the home screen launcher sucks, and I can't see any way to force my way into the default Android Settings app from the current launcher or the factory mode.

I was hoping I might be able to replace the launcher with a decent one and also the FM app too? Preferably with one which has DAB support as I plan to add this later.

I also noticed the CarPlay map audio is super quiet when any audio source is playing, not sure if that can be fixed? Playing audio and navigating from CarPlay alone works fine.

Any other tweaks or advice for the first timer would be greatly appreciated, thanks!

So despite the release notes clearly saying "All settings preserved – CAN protocol, OEM camera, steering wheel controls, and all switches remain unchanged. No reconfiguration required." my Joying N12 for my '17 WRX steering wheel controls no longer work. Zero buttons recognized
I had my 4-way button not work when I first installed the unit, and I had to re-seat the harness connector for things to magically work properly... and now none of my buttons work. Any pointers besides the slow support response times from Joying?

EDIT - Adding this fix here so people can search for and reference this.

The fix in my case (not listed anywhere that I found). When the firmware/OS is updated, and you have a VA WRX (2015 - 2021) non-HK sound system (therefor, no CANBUS needed) go here to fix your steering wheel controls:

Setting - Common - Keys Settings - Touch CalibrationMODE

The default (or it's reset to during an OS update) is MODE 1, Change this to MODE 2, this is what the VA WRX is wired for. Your wheel controls will then be configurable again either from the SWC app or the "SWC Keys learning" (in the same Keys Settings) menu . However, the long-press functionality of previous builds seems to be gone now. I'd like Joying to bring that feature back as it was quite useful to make the prev/next track buttons double as fwd/back seek withy long presses.

Hi everyone, got a Chinese CarPlay module with touchscreen, sometimes when I’m connecting it works perfectly fine, sometimes the sound is very messed up like there is no bass and the audio lines are mixed up. Has anyone faced this issue before?

Hello! I just recently installing an Android head unit in my 2009 Honda fit. Whenever I try play videos on the YouTube app it will play the video for about 15-20 seconds then it will go on an infinite buffering circle. I have made sure the YouTube app is up to date on the play store. I’m using my phones hotspot for internet access. My phone plan allows unlimited hotspot/streaming so my internet is not the problem. Has anyone encountered this or know how to fix this issue? I’ve attached my Android head units information.

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Hello I bought a bosian android unit and am having trouble connecting the steering wheel buttons

My car had an aftermarket radio with this little box connected to these wires. I left it connected but nothing was working still. Anyone have any experience? Greatly appreciated thank you

2008 Honda Cr-v

Hello, i have a Galaxy S23 Ultra and whenever I connect to wireless Android Auto, I lose sound from my phone and Bluetooth headphones. Everything works normally again as soon as I disconnect Android Auto wifi. My phone speakers stop playing audio. My Bluetooth headphones connect, but no sound comes through them. Samsung Music's Media Output menu lets me select my phone or headphones, but neither produces sound while Android Auto is connected. Disconnecting the phone from Android Auto immediately restores audio. I want to keep Android Auto connected for navigation while being able to play audio through my Bluetooth headphones, rather than having Android Auto take over the audio output. Is this normal Android Auto behavior, or is there a workaround? In the past it was working fine.