A couple of months ago, we wrote about the Raspberry Pi Compute Module 3E (CM3E) equipped with the Raspberry Pi RP3A0 SiP found in the Raspberry Pi Zero 2 W board. It looks like an OEM product from Raspberry Pi trading, and as such is close to impossible to purchase.
But if somehow, you’d like to have the guts of the Pi Zero 2 W into CM3 module form factor, Waveshare has designed the Zero-to-CM3 adapter for the Raspberry Pi Zero 2 W that should be compatible with most carrier boards designed for Raspberry Pi CM3 or CM3+.
As you can see, it is also using pogo pins to connect to the test points on the Raspberry Pi Zero 2 W board in order to route the USB, USB OTG, and SD card signals, so it will not work on older Pi Zero boards since the test points are in different locations. It’s not quite as neat as the Raspberry Pi CM3E module, since it’s thicker, and requires an HDMI to HDMI adapter, as well as a flat cable for people wanting to use the camera.
The main advantage of using Raspberry Pi Zero 2 W instead of Raspberry Pi Compute Module 3/3+ is the presence of WiFi, and it’s not impossible availability plays a role too. There’s no option for eMMC flash though, and the Pi 2 W only comes with 512MB RAM instead of 1GB for the modules. Also worth pointing out is that the MIPI DSI interfaces and the second CSI interface are not available either with that solution. But for most use cases it should do the job, and Waveshare tested it on their Compute Module PoE board. You’ll find a few more technical details in the wiki.
Waveshare sells the Zero-to-CM3 adapter board for $12.99 and less in higher quantities. It includes the HDMI adapter, flat cable for the camera, and a screw pack.
While on the topic of Raspberry Pi Compute Module adapters, Waveshare also introduced a CM4 to CM3 adapter ($14.99) that’s about the same as the Gumstix Raspberry Pi CM4 Uprev launched two years ago, as well as Raspberry Pi CM4 to Pi 3 adapter ($17.99) to bring the guts of the Raspberry Pi 4 to the Raspberry Pi 3 form factor.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.