Pi GPIO with bonnet
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- zachferguson
- Posts: 1
- Joined: Sat Sep 18, 2021 1:04 am
Pi GPIO with bonnet
I have a pi zero and an Adafruit lora bonnet. I noticed right away that the bonnet monopolizes all the pi GPIO pins. I did note that there is a single row of unpopulated through holes labeled like they're GPIO, but they don't match up to the pi header. Is it possible to use the pi's GPIO and the bonnet simultaneously? Are there any pictures showing this, a guide, anything? If I solder pins into the bonnet's unpopulated row, do I need to do anything else? Thanks for any info you can give me - this will be useless for my project without the GPIO access.
- mikeysklar
- Posts: 14194
- Joined: Mon Aug 01, 2016 8:10 pm
Re: Pi GPIO with bonnet
The single row of GPIO pins have traces run to them so you can utilize those. This type of bonnet can also accept 2x20 stacking headers.
https://www.adafruit.com/product/1979
I'm sure you have seen this, but this is the main pinout page for the LoRA bonnets.
https://learn.adafruit.com/adafruit-rad ... ts/pinouts
https://www.adafruit.com/product/1979
I'm sure you have seen this, but this is the main pinout page for the LoRA bonnets.
https://learn.adafruit.com/adafruit-rad ... ts/pinouts
- gynot
- Posts: 6
- Joined: Thu Nov 21, 2013 12:27 pm
Re: Pi GPIO with bonnet
Just remember that you have to be careful about how you stack things. The default hat architecture allows only one hat stacked on the pins. As I understand it the "real" hat has an EEPROM more than one and that EEPROM selection conflits. To understand this better there's a github page.
https://github.com/raspberrypi/hats
Now, what's the difference between a bonnet and a hat? I don't know, could be that the bonnet only has the bus and doesn't implement the address in EEPROM which could simplify the stacking of bonnets. Someone more knowledgeable than I should answer that question.
https://github.com/raspberrypi/hats
Now, what's the difference between a bonnet and a hat? I don't know, could be that the bonnet only has the bus and doesn't implement the address in EEPROM which could simplify the stacking of bonnets. Someone more knowledgeable than I should answer that question.
- mikeysklar
- Posts: 14194
- Joined: Mon Aug 01, 2016 8:10 pm
Re: Pi GPIO with bonnet
@gynot,
In this case @zachferguson is only asking for access to some of the unused GPIOs while using the bonnet. This was not an attempt to stack hats/bonnets.
The only bonnet definition I've come by is that they are specifically for 40-pin newer style Pi's including the Pi Zero. Not for the older 26-pin.
In this case @zachferguson is only asking for access to some of the unused GPIOs while using the bonnet. This was not an attempt to stack hats/bonnets.
The only bonnet definition I've come by is that they are specifically for 40-pin newer style Pi's including the Pi Zero. Not for the older 26-pin.
Forum rules
Talk about Adafruit Raspberry Pi® accessories! Please do not ask for Linux support, this is for Adafruit products only! For Raspberry Pi help please visit: http://www.raspberrypi.org/phpBB3/
Talk about Adafruit Raspberry Pi® accessories! Please do not ask for Linux support, this is for Adafruit products only! For Raspberry Pi help please visit: http://www.raspberrypi.org/phpBB3/