This 6-inch board turns a Raspberry Pi module into a DIY router

Let your Pi do the work while the CM4 router board handles the connections. Expand / Let your Pi do the work while the CM4 router board handles the connections. seed studio

If you're intrigued by the prospect of building a DIY router, Seeed Studio has a board just waiting to put a Raspberry Pi Computing Module 4 (CM4) to work. Assuming, of course, that you can find the Pi module.

Seeed's CM4 router board adds two full-speed gigabit network ports, two USB 2.0 ports, a microSD slot, an HDMI output, a GPIO interface for Raspberry Pi HAT add-ons, and a 0.91 OLED display thumb to your Pi CM4. Having the CM4 at the heart of the system gives you 32 different options for RAM, storage, and wireless capabilities on your homebrew router. The router board comes with OpenWRT installed, but it can run Ubuntu, Raspberry OS, or any other Pi compatible system.

Seeed notes that beyond DIY routers, the CM4 router board could also become a gateway, mini-NAS, wireless network bridge, or mini-server. You can buy a Pi CM4 with wireless capabilities, but you'll probably need (or prefer) a separate Wi-Fi setup connected to your DIY router.

Why not just plug a USB to Ethernet adapter into the Pi you already own? Seeed claims that its card's RTL8111E controller chip "provides better performance, lower CPU usage, and greater stability for a long time [sic] compared to a USB network card."

The CM4 router card should soon be available for around $55 from Seeed and Mouser Electronics, although the latter quotes a delivery time of 11 weeks beyond its initial stock.

Those looking for a Raspberry Pi CM4 board might consider Ars MightyPez reviewer's advice to keep an eye on the stock Pi Rpilocator monitor, which offers RSS feeds. You can even set up push notifications with the official Rpilocator Python script.

This 6-inch board turns a Raspberry Pi module into a DIY router
Let your Pi do the work while the CM4 router board handles the connections. Expand / Let your Pi do the work while the CM4 router board handles the connections. seed studio

If you're intrigued by the prospect of building a DIY router, Seeed Studio has a board just waiting to put a Raspberry Pi Computing Module 4 (CM4) to work. Assuming, of course, that you can find the Pi module.

Seeed's CM4 router board adds two full-speed gigabit network ports, two USB 2.0 ports, a microSD slot, an HDMI output, a GPIO interface for Raspberry Pi HAT add-ons, and a 0.91 OLED display thumb to your Pi CM4. Having the CM4 at the heart of the system gives you 32 different options for RAM, storage, and wireless capabilities on your homebrew router. The router board comes with OpenWRT installed, but it can run Ubuntu, Raspberry OS, or any other Pi compatible system.

Seeed notes that beyond DIY routers, the CM4 router board could also become a gateway, mini-NAS, wireless network bridge, or mini-server. You can buy a Pi CM4 with wireless capabilities, but you'll probably need (or prefer) a separate Wi-Fi setup connected to your DIY router.

Why not just plug a USB to Ethernet adapter into the Pi you already own? Seeed claims that its card's RTL8111E controller chip "provides better performance, lower CPU usage, and greater stability for a long time [sic] compared to a USB network card."

The CM4 router card should soon be available for around $55 from Seeed and Mouser Electronics, although the latter quotes a delivery time of 11 weeks beyond its initial stock.

Those looking for a Raspberry Pi CM4 board might consider Ars MightyPez reviewer's advice to keep an eye on the stock Pi Rpilocator monitor, which offers RSS feeds. You can even set up push notifications with the official Rpilocator Python script.

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