Info Display Screen DIY

Community Projects
1

Hi every one,

I’m a new beginner and I have a project in my mind… if it’s done already and I’m making a repost or saying something really unlogical… A big sorry in advance…

Okey about my project…

So I have this opel vauxhall saturn / astra h mk5 what ever it’s name over there :)… and I have bid screen

http://www.diagnostics.org.uk/wp-conten … bc-yes.jpg

I want to change this screen to a LCD one but rather than just ordering and LCD screen connecting it to dash and loose every function of this display I want to have these functions and have a LCD screen too…

While I was wondering in google writing hoplessly key words I see ardiuno box on my desk and I found my self reading these discussions and looking to products of the sparkfun :)…

So my big question is will it work ? You may directly say “why not??” but I have some questions and if you can answer them I will be much appriciated…

Here they are:

  1. What I understand from my reading I have to get ardiuno(check) and can-bus shield(need to buy) right?

  2. I do not want to use obd-2 port I want to use orginal wiring of the current screen (Where is my haynes manual) so if I can connect canl and canb of this wiring loom will it be enough?

  3. If get it correctly to create visiual output first I have to read every signal for every function and define them and code them to my interface. So how can I understand what I’m reading from signals ??

  4. In these cars sterio send password to screen or screen send password to the sterio for protection. I have the code so that is not the issue the issue is how can I make same password comunication between sterio and arduino unit?

  5. Can arduino readings may cause damage any damage to ECU or any unit realted ?

Sorry for the English :frowning: and thanks…

2

Looks like you did some research already. I think there are a few members here that have experience with modding the electronics in vehicles. If it were me, I would search Google and find someone that has documented interfacing an LCD screen into a ODBII system. This will give a base to get started. Then all you need to do is program the Arduino to read and interpret this data (which example code should be posted in this documentation). After that it’s nothing to get the Arduino to send data to an LCD.

  1. It shouldn’t hurt any electronics in the vehicle as long as you’re not sending data or manipulating the data on the ECU.