Particle classic adaptor pinout

boron
photon
Tags: #<Tag:0x00007f03952c3e50> #<Tag:0x00007f03952c38d8>

#1

Is there documentation for the particle classic adaptor pinout? For the photon side of the adaptor, there are more pins on the adaptor than on a photon so I was curious how to determine which pin is what. Thanks!


#2

The mapping of the pins is here:

https://docs.particle.io/datasheets/accessories/mesh-accessories/#classic-adapter

Some things like SPI1 also will not work because the pins aren’t mapped the same way. And you also need to beware that the 3rd-generation devices (Argon, Boron, Xenon) are not 5V tolerant.


#3

Ah yes I found that pin map but was confused how it worked for actually determining what physical pin was what on the photon side of the adaptor since the photon only has 24 pins and the photon side of the adaptor has 36 pins. I’m assuming that once I figure out where one of the pins is, the rest would follow the typical photon pin mapping so I just didn’t know which side of the adaptor would overhang when I plug in the photon into a phobot.

Also by the device being 5V tolerant you just mean that it cannot receive 5V inputs into any of its pins besides being powered by a usb right?


#4

The legacy side (male pins on the bottom) are designed to fit an Electron. So when plugging into a Photon socket makes sure the B/C pins side are hanging off the end, not plugged into anything.

You cannot supply more than 3.3V to any pin on the Argon/Boron/Xenon (except VUSB and the USB connector).


#5

I would like to provide just a little clarification, since I found the pinout information a bit confusing.

If you plug a Boron into the classic adapter and then plug the adapter into a legacy shield (for example a relay shield), then the power port for the Boron should line up with where the power port for a Photon would be.

Also, if you try to power the Boron using power to the relay shield, you could fry the Boron. I was powering a relay shield with a 5V power supply and when I seated the Boron into the shield (using the classic adapter) it died. The Boron that I fried will only display a solid yellow LED when I power it with a USB now.


#6

If you plug a Boron into the classic adapter and then plug the adapter into a legacy shield (for example a relay shield), then the power port for the Boron should line up with where the power port for a Photon would be.

Yes, that is correct. The B and C pins on the bottom of the classic adapter (used on the Electron) will overhang the Photon relay shield and not plug into anything.

Powering the relay shield should not damage the Boron. The Particle relay shield has a 5V regulator and supplies 5 VDC to VIN. This is mapped to VUSB on the mesh device.

The VUSB pin can be used as a power input on a mesh device, and the Argon, Boron, and Xenon should not be damaged by that.

However, if you’re now getting a solid yellow LED, the Boron could have been damaged. It’s probably not a good idea to plug it in while powered. And the relay shield power input is 7V to 20V. 5V is below what is recommended, though that should not have damaged anything.