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If I could give you my two cents on this, as I just spent the whole last week looking for the less "intrusive" way to mount the raspberry screen with the case that your are talking about.

I tried a magnetic CD mount that I have for my phone and that wouldn't hold the pi, neither the magnets nor attaching it directly with screws to the pi. It probably has to do with the weight of the screen and the mount being for a phone, but also the fact that the back of the pi case comes off very easily, so you are going to have to find a way to secure it better. If you want to try the magnetic mount, I would recommend something like this one: https://www.amazon.com/TechMatte-Magnetic-Universal-Smartphones-including/dp/B00V54LQO4/ref=sr_1_6?ie=UTF8&qid=1521574100&sr=8-6&keywords=cd+mount, because you will be able to tighten the part that holds the magnets, so it might be able to support the pi screen.
Another thing, with this mount the pi screen is going to protrude a lot, so it won't be flush to the CD/stereo. In the bright say, you will be able to angle it as you please and it will be closer for use.

I agreed that the 2 DIN slot is the best looking way, but it depends in the car that you own and how important is your stereo to the overall operation of the car. In my case, I can't take the stereo out, as it is linked to the rear view camera and I really like that.

I did a custom install, picking up ideas from other people in the forum.

I installed it today and it's pretty good. The sides are a little short. There's about 2mm on each side that is not covered, but up and down it's perfect. My edges will probably be covered by the bezel anyway.

It also has a hole for the Fire camera (on the Fire) which I don't need, but it looks fine anyway. This screen is almost a "half gloss". You can still see reflections, but they're definitely muted. I like it so far.

It's cheap at only $6 for 3.

This one is:https://amazon.com/gp/product/B015IKFXM6/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

Thanks for the reply.

Ok, so, I plug the phone (which has quick charging) into the Pi to run AA, and connect my phone to the car's bluetooth stereo, and that keeps steering wheel controls. Awesome. From what I gathered, it seemed like it could, but I wanted to double check.

I have a quick charger that that has two USB ports. Do I need more than that, or will 2 do? https://www.amazon.com/Charger-Compatible-Devices-Anker-PowerDrive/dp/B07H4LH6P7/ref=sr_1_1_sspa?keywords=anker+car+charger&qid=1554666838&s=wireless&sr=1-1-spons&psc=1

I was planning on housing it all in this: https://www.amazon.com/Raspberry-Pi-7-Inch-Touch-Screen/dp/B01GQFUWIC/ -- since the HMDI port is accessible, which I'm assuming I'll need if I end up adding a back-up camera.

And yah, good tip. I'll definitely build it out of my car to test everything before I install it.

I'm just using a marine amplifier behind the Pi. That does all the fun stuff you would need a head unit for, even has a volume knob but it's pretty ugly so I left it alone and just use the gpio volume control.

I went with a marine amplifier because it's about as small as you can get so I am able to stick it behind the dash, it's more powerful than most headunits too so it's not a bad choice. Here's the one I use Pyle Hydra Marine Amplifier - Upgraded Elite Series 400 Watt 2 Channel Micro Amplifier - Waterproof, GAIN Level Controls, RCA Stereo Input, 3.5mm Jack & Volume Control (PLMRMP1A) https://www.amazon.com/dp/B003HH9FIQ/ref=cm_sw_r_cp_apa_teiSBbGEQT236

Oh that's what cbxxxx was saying wasn't it. Have you done that? And it works? I thought usb chargers used the data wires to determine how much current to allow?

Edit- thanks for the advice, just ordered this Y cable that'll let me do exactly what you said. Hopefully that'll solve the problem

https://www.amazon.com/dp/B00NIGO4NM/ref=cm_sw_r_cp_apa_9hdZAbX7R2GQQ

If you don't mind, do you have this one? Adafruit TSL2591 High Dynamic Range Digital Light Sensor [ADA1980] https://www.amazon.com/dp/B00XW2OFWW/ref=cm_sw_r_cp_apa_i_b5jwCbHQKJMEN

If so, can you tell me how you wired it? Thank you!

I have this: https://www.amazon.ca/Satechi-Bluetooth-Button-Media-Compatible/dp/B00RM75NL0/ref=sr_1_6?ie=UTF8&qid=1539283799&sr=8-6&keywords=satechi+remote

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It controls the play/pause, skip forward, skip back functionality just fine. Volume up and down does not work as this remote is controlling the phones volume and not the raspberry pi. (Phones volume does nothing when in android auto mode)

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I will also add that the device goes to sleep after about 15mins of inactivity to save battery so it does take a couple seconds for it to wake up and re-establish a Bluetooth connection with my phone before i can pause audio.

I am using the Smartipi case which comes with the Y adapter. https://www.amazon.com/Case-Official-Raspberry-Touchscreen-Display/dp/B01HV97F64/ref=sr_1_1?ie=UTF8&qid=1521139404&sr=8-1&keywords=smartipi

Boot up is 10 seconds max. Works great.

I first bought this one but the end that goes into the Pi sticks much further out than a the card normally does and would not fit inside the case. This one is as big as a normal micro sd card and fits well. Just note (I didnt realize this until my Pi wouldn't boot) this opens and card is placed inside, not just slid in. Only issue with the one I am using is its very short, so have to be careful when removing the back.


https://www.amazon.com/gp/product/B00S6AMYB4/ref=oh_aui_detailpage_o01_s01?ie=UTF8&psc=1

Really like this idea! would this work?
https://www.amazon.com/HooToo-Adapter-Charging-MacBook-Chromebook/dp/B019R9ILTG
you would have to still use a 12v connector & usb-c to usb-c to power the hub...

I'm not really sure what I should be searching for, but I was reading this page

https://www.meccanismocomplesso.org/en/quale-schermo-lcd-scegliere-per-il-raspberry-pi-lcd-touch-screen/

and toward the end they talk about this screen that works with the PI

https://www.amazon.com/SainSmart-TFT-LCD-Display-Arduino/dp/B00INKB51W

But looks like it might be a resistive screen though.

There has to be a capacitive screen out there that will work.

You could also try a repeater like this: https://www.amazon.ca/dp/B00CQ3BC4W/ref=cm_sw_r_cp_apa_I9lUBbM3JAZEC instead of a vanilla junction piece.

You won't be able to use the hdmi for the backup camera. You will need a ribbon cable extension thingy like this: HDMI Extension for Pi Ribbon Cable

Just wanted to give you a heads up on this.

The official Pi camera module with a waterproof housing and these extenders over HDMI work well:

https://www.amazon.com/Arducam-Extension-Module-Raspberry-Specific/dp/B06XDNBM63

If your Pi's USB ports are exposed, this USB mic works well and is less than $5:
Kinobo

The information missing from the thread linked above is that the dongle mentioned is something like the Carlinkit dongle (there are other dongles, and other places to shop for them): https://www.amazon.co.uk/Carlinkit-Wireless-Navigation-Function-Bluetooth-Android-Car-Radio-black/dp/B07S1M8C34/

Also, be aware that you need to figure out how the RPi should power on and off, to not corrupt the sd card.

I'm using a 12v buck converter wired into a Y-cable and has been providing fast charging on my Nexus 5x (usb-c). Also powering some other devices with the convertor so it's not entirely necessary - you could just use a car charger for example.

https://www.amazon.com/gp/product/B00CE75K0W/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

CAN BUS to Serial:
https://smile.amazon.com/KNACRO-SN65HVD230-Communication-transceiver-Arduino/dp/B01ILU2WP6/

CAN BUS to SPI (faster):
https://smile.amazon.com/CHENBO-Electronics-Receiver-Controller-Development/dp/B015W4D9WY/

You can also get an OBD to USB/BT/WiFi

I just ordered a list of parts.

-rpi cam

-25' hdmi cable

-set of hdmi adaptors
The original: https://shop.pimoroni.com/products/pi-camera-hdmi-cable-extension

Alternative:
https://www.amazon.com/Arducam-Extension-Module-Raspberry-Specific/dp/B06XDNBM63

It's going in a topless 86 4runner, so I'll be drilling a small hole in the tailgate and mounting INSIDE the tailgate assembly by removing the access panel on the bed side of the tailgate. Then, I'm going to run the hdmi through the harness ports, down the side- interior of the body with the rest of the harnesses. I'll trigger it via gpio that is activated by a relay that is triggered by the reverse switch wire.

As for waterproofing the camera, I'll be mounting the camera/adaptor in a floss container and sealing any water access points with hot glue(can be removed if needed). I'll be attaching the waterproofed apparatus to the drilled hole using something such as sugru (which I love), but any waterproof expoxy or rtv will work.

You can connect to Crankshaft using bluetooth, but only using Android Auto. You might wanna add a bluetooth/ aux thing. I used this in my older car that had an aux input but no bluetooth. https://www.amazon.com/AUKEY-Bluetooth-Receiver-Magnetic-Microphone/dp/B0168GBMCY/ref=sr_1_4?crid=2F18XGGMBRLB8&keywords=aukey+bluetooth&qid=1569240324&sprefix=aukey+b%2Caps%2C148&sr=8-4