0

I want to control the startup of a Raspberry Pi 4 and at the same time listen to the GPIO status of the 40 pin. Can I use an Arduino for that? If so, any advice on which Arduino shall I use?

1 Answer 1

2

You can monitor the Pi GPIO from an Arduino.

Note that all the Pi GPIO are 3V3 and there are 28 of them on the 40-pin expansion header.

You will need an Arduino with at least 28 GPIO if you want to monitor all the Pi GPIO simultaneously. Although a 5V Arduino will probably see a Pi logic high 3V3 as high it might be safest to use a 3V3 Arduino.

Remember you must also connect the Arduino and Pi grounds.

4
  • Ok, thanks. Do you about an Arduino HAT that I can "plug" directly on top of Raspberry and suitable for that?
    – Miguel
    Mar 8, 2020 at 11:37
  • I found this, for example. Will it be a good possibility?
    – Miguel
    Mar 8, 2020 at 11:43
  • Does that contain an Arduino? Note that shopping advice is off-topic for this site.
    – joan
    Mar 8, 2020 at 12:39
  • Yes, you are right. Sorry, forgot about that. In that case, can you advise any good introduction on how to read a schematic map?
    – Miguel
    Mar 8, 2020 at 12:48

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.