andrea.soster
Posts: 2
Joined: Tue Aug 28, 2018 10:02 am

using the GPIO with Raspberry Pi PoE HAT

Tue Aug 28, 2018 10:16 am

Hi,
I just received my Raspberry Pi PoE HAT(s) and I was expecting to still be able to access the GPIO pins of the board...is there any way to acccess them? I don't want to add another HAT, just to be able to connect some wires to the GPIO pins.

thanks

fruitoftheloom
Posts: 17838
Joined: Tue Mar 25, 2014 12:40 pm

Re: using the GPIO with Raspberry Pi PoE HAT

Tue Aug 28, 2018 10:31 am

andrea.soster wrote:
Tue Aug 28, 2018 10:16 am
Hi,
I just received my Raspberry Pi PoE HAT(s) and I was expecting to still be able to access the GPIO pins of the board...is there any way to acccess them? I don't want to add another HAT, just to be able to connect some wires to the GPIO pins.

thanks

Yes you can add pass through pins, surprisingly it is mentioned in the Official Blog:

https://www.raspberrypi.org/blog/introd ... t-poe-hat/
Adieu

B.Goode
Posts: 6544
Joined: Mon Sep 01, 2014 4:03 pm
Location: UK

Re: using the GPIO with Raspberry Pi PoE HAT

Tue Aug 28, 2018 10:32 am

Welcome to the Raspberry Pi forums.

From the Raspberry Pi Foundation blog post describing this add-on: https://www.raspberrypi.org/blog/introd ... t-poe-hat/
Because the fan is controlled over I2C, none of the GPIO are used, so you can stack a second HAT on top of the connector. To do this you will need to buy some longer pass-through headers that expose the pins on the other side of the PoE HAT. You will need one for the 40-way and one for the 4-way connector that has the PoE splitters on it.
Edit: beaten to the Submit button, but left here for reinforcement, not as a deliberate me-too echo...

andrea.soster
Posts: 2
Joined: Tue Aug 28, 2018 10:02 am

Re: using the GPIO with Raspberry Pi PoE HAT

Tue Aug 28, 2018 10:37 am

Thanks, I will buy those!
I searched for information on the official product page, maybe it should be reported there :-)

thanks again for your quick support!

wpns
Posts: 85
Joined: Sat Sep 01, 2012 2:50 pm

Re: using the GPIO with Raspberry Pi PoE HAT

Tue Sep 11, 2018 9:15 pm

I have some on order, but they aren't here yet, so I ended up soldering jumper wires to the bottom of the board to get my RPi Display up and running.

Also, make sure you use the standoffs, the PoE HAT will run into the RPi board if you don't.

Also also, M2.5x16 screws will(?) allow you to mount the Pi and the PoE Hat on the Display board, as the supplied hardware is all standoffs and screws. There's probably another solution using male/female standoffs, but those are harder to find...

hansamann
Posts: 7
Joined: Fri Mar 22, 2013 7:40 pm

Re: using the GPIO with Raspberry Pi PoE HAT

Wed Sep 26, 2018 7:55 am

I ordered some extra long pin headers to get access to the GPIO pins of the raspberry pi. But the problem is that many pin headers are 0.65x0.35 in size (the area of the pin) and they will not fit very well with regular female jumper cables. Did someone find good extra larger headers that go along well with jumper cables?

User avatar
bensimmo
Posts: 3497
Joined: Sun Dec 28, 2014 3:02 pm
Location: East Yorkshire

Re: using the GPIO with Raspberry Pi PoE HAT

Wed Sep 26, 2018 8:19 am

Way back on the Pi HAT spec launch they gave a link
https://www.raspberrypi.org/blog/introd ... y-pi-hats/
and you basically end up here https://www.toby.co.uk/search/?keywords=REF-18

and here is the spec of theirs for 10mm long ones
https://www.toby.co.uk/uploads/publications/1541.pdf

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