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Newbie questions
Dear harryberlin, forum members,

After a long planning, yesterday, I successfully got an MCP2025 chip and an Arduino Mega 2560.
The first thing, was to upload harryberlin's IBUS Hex file to the MEGA (Rel:181024).
I hooked everything, but the car, doesn't seem to see the MEGA.

I've searched a lot for these question, but with no luck.

So , my question are :
- The MEGA uses the same PIN's with the .hex : D8,D9,D13 ?
- Is it safe to connect the MEGA to the car via the MCP2025 AND with USB to the computer ?
- Is it okay that the MCP2025 is powered via PIN1,PIN3 ( CAR 12V ), that on PIN4 (LBus / IBus ) there is 12V too? ( Measured via Multimeter )

Thanks, for your answers!

P.S.: Sorry, for the noob questions  Angel
E39 525d Touring Automatic 500'000 km+++
MEGA uses other PINS for IBUS-Serial Connection:

Updates (you should reset settings):

Never tried Mega: +12V to VIN.
Years ago i had connected the Nano +12V to VIN. It was working.
But the MCP don't shut down and don't turn off the Arduino.

Yes, you can connect with USB to the Computer.

In Idle State the IBUS Line is: HIGH = +12V
Image <> Kodi Addon

[Bild: usersignaturpic-14941mspx.jpg]
Thank you, now it is working!

And sorry, I forgot the most important thing: Thank you for your time and effort on this project!
E39 525d Touring Automatic 500'000 km+++

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