Sleeping mode - CarPC Project

mbt28 · Posted at 3/13/2015 18:07:44

Hello,

I do not know which car are you working on but if you get a CAN tranceiver microchip you can combine it with regular microchip. Then you can control the board as you like. You can MCP series of microchips, for the programmable microchip you can have an attiny and install arduino software. You can burn the arduino bootloader simply by using usb to ttl card which is like 2usd in aliexpress.

These CAN transceivers they have on-board regulated voltage output. They wakes up immediately with the any can signal in the car, and provide regulated voltage. With that voltage you can easily drive your microchip and this microchip can manage the power.

It is going to be even cheaper, safer and simplier I think. Because in any case you should use a can receiver in your car pc.

Regards.

firefan · Posted at 3/15/2015 16:18:32

hi,
its VW GOLF 2004 (MK4), there isn't CANBUS there,
Either-way, Thanks a lot for your efforts.

mbt28 · Posted at 3/16/2015 17:01:30

I see, as far as I check on the internet you might have something similar can bus not bus but a network line which uses it.

Do you have illumination on your button light during the night and day?

firefan · Posted at 3/16/2015 22:08:25

yes i have.

mbt28 · Posted at 3/17/2015 16:53:38

Hello,

This has to be working through a network, It is similar to odb 2 standard. If you want to build fully functional head unit you should be able to decode this line and inject bytes as well.

mbt28 · Posted at 3/17/2015 19:06:56

Last edited by mbt28 In 3/17/2015 19:12 Editor

Hi,

Well also I discovered that I can read battery voltage over ibus. Maybe you can do the same over your network, in this case no need to shutdown the board until the battery voltage downs on a defined level.

Regards,
Mehmet

firefan · Posted at 3/18/2015 19:47:37

hi Mehmet,
OBD and IBus are complicated solutions (At least for me), i found Voltage reader module (on IGN wire), very cheap and easy to use.

BTW, did you got your board already?

semperfi1776 · Posted at 9/1/2015 06:25:28

mbt28 Posted at 3/12/2015 21:46
Hello,

If you use microcontroller like attiny something else I suggest you to use a optocoupler. ...

Hi firefan,
I see that you are using the board as a head unit. I was wondering if you are using android 4.4 as the OS. if so are you supporting bluetooth A2DP sink and HFP? if yes, did you have to manually enable A2DP sink and HFP on firefly's android image? thanks