raspberry pi support ?

[pengyunchou]

No description provided.

[xinsnake]

I believe it can be quite challenging as the issue is raspberry pi has only 1 Ethernet port, and it's not 1Gbps either.

[stapelberg]

At this point, I’m not looking to add any more supported platforms.

That said, I started development on a Raspberry Pi 3B with an Apple USB ethernet adapter, so it should be possible to run router7 in such a setup, possibly with a few changes. If you want to do the work, we can talk about getting pull requests merged to make this possible.

[stapelberg]

With gokrazy/kernel change gokrazy/kernel@88166bd, the required kernel modules for router7 are now available.

So, if you change e.g. the image Makefile target:

router7/Makefile

Lines 14 to 24 in 1250211

	go install github.com/gokrazy/tools/cmd/gokr-packer
	GOARCH=amd64 gokr-packer \
	-gokrazy_pkgs=github.com/gokrazy/gokrazy/cmd/ntp,github.com/gokrazy/gokrazy/cmd/randomd \
	-kernel_package=github.com/rtr7/kernel \
	-firmware_package=github.com/rtr7/kernel \
	-overwrite_boot=${DIR}/boot.img \
	-overwrite_root=${DIR}/root.img \
	-overwrite_mbr=${DIR}/mbr.img \
	-serial_console=ttyS0,115200n8 \
	-hostname=router7 \
	${PKGS}

such that:

1. GOARCH=arm64 is set instead of amd64 (for the Raspberry Pi vs. the PC Engines APU)
2. -kernel_package=github.com/gokrazy/kernel
3. -firmware_package=github.com/gokrazy/firmware

you should be able to run router7 on the Raspberry Pi just fine.

---

One caveat: even with the Raspberry Pi 4, which has a gigabit ethernet port as part of its system-on-chip, and USB3 ports to which you can connect an additional gigabit ethernet adapter, it proves tricky to get full gigabit speeds:

1. using gokrazy.org, I get ≈500 Mbit/s: https://twitter.com/zekjur/status/1273513899187408897
2. using Raspbian, I get ≈860 Mbit/s

The measured speed without the Raspberry Pi in the middle is ≈930 Mbit/s.

So, if your upstream connection is slower than 500 Mbit/s, running router7 on the Raspberry Pi 4 might be a good option for you.

That said, it’s still not a good option for me, so I won’t officially recommend doing so—if you’re willing to enter uncharted territory, let me know how it goes! :)

[matthyx]

Hi @stapelberg I think something like https://www.dfrobot.com/product-2242.html should work... if I can get my hands on a CM4 module, I will report back success (or lack of) here.

[stapelberg]

Looks like a good option for the Raspberry Pi indeed. Looking forward to your report!

[matthyx]

For the moment it seems impossible to get one... maybe @geerlingguy can test it as a follow-up to https://www.jeffgeerling.com/blog/2021/two-tiny-dual-gigabit-raspberry-pi-cm4-routers