Raspberry Pi - 2 hats

Hi all

Total newby here, what would i need to get a raspberry pi controller to run a 4g hat and a NFC hat at the same time?

Cheers
Glenn

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You only need to make sure that the GPIO pins (other than the bus based pins) are not doubled up on and you can stack as many as you want.

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First you need to see if the hats use the same pins, here’s a good place to start https://pinout.xyz/phatstack if they both use the I2C pins for I2C I2C at Raspberry Pi GPIO Pinout then it’s ok as long as they don’t have the same I2C address
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Looking at these:

This NFC HAT for Raspberry Pi (PN532) | Waveshare | Core Electronics Australia looks like it can run off I2C so it should work with the aboce 4G hats (extra documentation here ) it’s a pitty Waveshare doesn’t have much on pinout.xyz :frowning_face:

Anyway, if you need more clearance for the pins on top of the 4G HAT you could use something like this Extended GPIO Female Header - 2x20 Pin (13.5mm/9.80mm) | Sparkfun PRT-16764 | Core Electronics Australia

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Hi Doug,

I’d visited pinout.xyz before but never used the pHAT stack configurator before. What a great tool!

While it isn’t a HAT I’d also suggest the PiicoDev RFID module as a potential reader as it uses I2C which is usually the go-to communication protocol for when your Pi is already wearing a HAT/ stacking HATs.

A post was merged into an existing topic: Waveshare 8202G 5G HAT not working with Pi 4B

Thanks,

Thank you so much! I will digest the information and have a crack once im comfortable with what i need…

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