Mazda 6 (2004) Stock Navi: NaviPi!

[KreAch3R]

Hello! 



I'm pleased to be able to finally present my completed project. I installed RPi 4B+OAP inside the stock Navigation unit of the first generation Mazda 6 (2004). I had to track down the unit and ship it to me because my car didn't come with it and painted it. 

I also used an AUX XCarLink module for Bluetooth audio + music so that the stock stereo can remain fully functional (including the small display). I also took extra care so no permanent modifications are made to the car; I made a custom Mazda to Mazda harness so you can remove everything. 



Features:

• Functional OAP (no backup camera because I use an aftermarket Mirror camera)
  
• Functional OBD
  
• Functional wireless AA
  
• Functional Google Assistant
  
• Functional steering wheel controls (including answering/hanging up calls)
  
• Functional stock stereo unit
  
• GPS module
  
• RTC module
  
• Automatic screen dimming (photoresistor inside stock IR sensor window)
  
• Temperature (including greek summers: 40-65C)
  
• Functional stock Navi behavior (all buttons work, screen tilts and opens/closes, position "memory" works)
  
• Safe power up and shutdown (RPi powers up on "ACC on" and triggers a shutdown on "ACC off", BAT power stays on for 15 seconds waiting for RPi to turn off safely then turns off).
  

Part list (ask me specifically about something and I'll try to find links to buy):

Raspberry Pi 4b 2GB
USB sound card CAB-U036
Microphone random 3.5 jack one
CSR 4.0 bluetooth dongle (not fake)
Official RPi touchscreen
ds1307 rtc module
DOUBLE-LAYER ACRYLIC CASE FOR RASPBERRY PI 4 MODEL B
Raspberry Pi Dual Cooling Fan Kit Module
USB GLONASS GPS Receiver UBLOX M8030 Dual GNSS Receiver Module Antenna FLASH PC
3.5mm Audio Aux Noise Filter Ground Loop Isolator Eliminate Car Electric Noise
OBDII Bluetooth adapter

custom 12v to 5v 3A converter (built my own):
https://bluewavestudio.io/community/showthread.php?tid=1391
12V/24V LED Automation Delay Timer Control Switch Relay Module PCB Board w/ Case
XL4015E1 step down converter

custom Mazda to Mazda audio harness (built my own)

https://github.com/opencardev/crankshaft/wiki/Boot,-reboot-and-shutdown-the-Pi-with-ignition-key
12V 40A automotive relay https://github.com/scruss/shutdown_button

Photoresistor GL5528 LDR https://github.com/dandydanny/PiAutoDim 

random ANGLE BRACKET

XCarLink aux module

Tasker (Android app)

Video of the install:

https://www.youtube.com/watch?v=i4B1WcOLxLU


Photo story of the install:

https://photos.app.goo.gl/xheAwoG4qWsdQWJ66



I want to thank the OAP team because this wouldn't possible without them, and also all the forum members that helped indirectly with their posts and input. My Mazda thanks you all.

[jennmike2]

Looks great!!! i was going to put mine in a Mazda 6 2008 but hit a deer last year. Newer 2017 jeep replaced it so now i dont want to put it in until the warranty runs out.

But nice job.

[KreAch3R]

Looks great!!! i was going to put mine in a Mazda 6 2008 but hit a deer last year.  Newer 2017 jeep replaced it so now i dont want to put it in until the warranty runs out.

But nice job.

Thanks! Shame for your Mazda. Well maybe you can get it inside your jeep but make yourself a custom harness and buy second dashboard parts as needed as well so that it can be uninstalled without any permanent modifications.

[Daniel_BlueWave]

Good to see such a great setup and execution. Looks like it was there from the beginning. Idea with custom harness is really clever.
Thank you very much for sharing, providing list of components, photos and description. We appreciate that.

We also encourage you to present your project on Reddit in Rpi section. We think that larger audience should be able to see that.

[KreAch3R]

Good to see such a great setup and execution. Looks like it was there from the beginning. Idea with custom harness is really clever.
Thank you very much for sharing, providing list of components, photos and description. We appreciate that. 

We also encourage you to present your project on Reddit in Rpi section. We think that larger audience should be able to see that.

Thank you Daniel! I did as you said, I made a post for /r/raspberry_pi, check it out here: https://www.reddit.com/r/raspberry_pi/co...od_navipi/

[KreAch3R]

Update on my build. I finally pulled the trigger and installed a compatible rear camera. I used a relay to trigger a GPIO pin, and the common rca usb grabber EasyCap, and everything works beautifully. Some pictures of the install:








Thanks OAP!

[n3zhov]

Hello there!
You're project inspired me to do something familiar with my own gg mazda, but i have some questions.
Do you still have dimensions of power relay box? I'm just a newbie to this kind of stuff and didn't find anything according to this.
How did you managed to connect RPi with steering wheel buttons?
Do you have some scheme or something like that for camera connection?
And maybe you still have 3d model for angel bracket, because in mine monitor assembly they're missing entirely.
And by your photo it's not such clear what to do with wirings, how to conncet them and so on, but still, i'm just a newbie to this stuff

Thank you in advance for the answer!

[Sicboy]

HI! Glad to see project like ive make. can u help me with obd pids in this m6?
p.s. its 2004, yes i change multimedia from 2006

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have no ideas how to hide gestures sensor. make case like this.

[KreAch3R]

Hello there!
You're project inspired me to do something familiar with my own gg mazda, but i have some questions.
Do you still have dimensions of power relay box? I'm just a newbie to this kind of stuff and didn't find anything according to this.
How did you managed to connect RPi with steering wheel buttons?
Do you have some scheme or something like that for camera connection?
And maybe you still have 3d model for angel bracket, because in mine monitor assembly they're missing entirely.
And by your photo it's not such clear what to do with wirings, how to conncet them and so on, but still, i'm just a newbie to this stuff

Thank you in advance for the answer!

Hello, sorry for the late reply!

I don't have any dimensions, I bought some boxes that thought I could fit it inside. Speaking from memory only, it should be something like 10cm x 5cm x 5cm.
I didn't connect the pi with steering wheel. I am using XCarLink simultaneously, connected with bluetooth to my phone (with Tasker), to accomplish the music/audio/steering wheel part of it. Check the original post.
About the Camera, what kind of scheme? It's basically Camera -> cable to  EasyCAP equivalent USB video adapter (check the other thread about which one) --> powered USB hub --> RPI. 
About the angle bracket, you mean, the part that I 3d printed? Yes I have a 3d model, I can attach it here if you would like. Notice though, that it did need manual trimming to fit after I printed it. 
Now about the wiring, yeah it's not clear because it's not meant to be a guide. If you really want to learn to do this, you gotta read all the other threads and understand basic DC power circuitry.

---

HI! Glad to see project like ive make. can u help me with obd pids in this m6?
p.s. its 2004, yes i change multimedia from 2006

---

have no ideas how to hide gestures sensor. make case like this.

Hello, looks great! It's so awesome when someone else uses your idea! About the OBD pids, what about them? I'm using a bluetooth OBDII port adapter and Pi just connects to it. I haven't really looked into if something is missing. 

I don't use gesture control at all, but if I did, I would try to place it inside the center vent, or inside the CD slot, or in the empty cassette cover. Wherever it fits or makes more sense for the movements. An alternative would be placing it behind the IR glass, if you haven't used it for the ambient light sensor, like I did.

[KreAch3R]

I added a car battery voltage custom Dashboard, check it out here: https://bluewavestudio.io/community/thread-3738.html

---

Front Camera and Camera Video Channel Converter Installed!



I bought this camera:
https://www.aliexpress.com/item/10050032...18022x6Sb0



and this converter:
https://www.aliexpress.com/item/32819254...18022x6Sb0



I placed the front camera button here:



and I can confirm that the converter works beautifully with my USB grabber and consequently with OpenAuto. It automatically shows the reverse backup camera when the reverse gear is engaged as stock behavior, but when you disengage the gear, the front camera is shown automatically for some seconds. Very handy for tight parking. 

And you also get the front camera button which allows you to just press the button and enable the front camera without engaging the reverse gear at all. Openauto is completely obeying its orders (because of the GPIO trigger, of course).