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Adding WiFi/Ethernet to the Compute Module 3+

Posted: Mon Jul 22, 2019 2:16 pm
by rgk
To use a compute module 3+ in an industrial setting it is highly likely that one would want to add the very same WiFi/Ethernet that is on the Raspberry Pi 3B+. Is it possible for raspberrypi.org to post that portion of the RPi 3B+ schematics to the compute module documentation page with any code requirements? The SPI version suggested on the documentation page at https://www.raspberrypi.org/documentati ... w-guide.md would be inadequate for most industrial uses.

Re: Adding WiFi/Ethernet to the Compute Module 3+

Posted: Sun Jan 12, 2020 6:00 pm
by ichibrosan
The Raspberry Pi 3B+ has an onboard Broadcom WiFi module that is closely integrated with the CPU cores of the PI. The primary interface between the two is an SDIO channel and the software support is buried deep in the Raspbian code. I am not aware of any workable SPI interface that will provide the same usability as the 3B+. I was looking at this development board for the compute module
https://www.amazon.com/gp/product/B07H8 ... _qh_dp_hza
and I think it was a shame they didn't include the Broadcom chip to provide both the Bluetooth and Wifi support that the Broadcom chip gives the 3B+.
In a way, it's too bad the compute module didn't get the Broadcom WiFi module as well, seeing that communication is so important. I hope someone will see that lack and provide the missing functionality. Also, it might have been nice to consider how to support a cluster of the compute modules with some common backchannel on the bus.