You call THAT a router?! 2 Tiny Raspberry Pi Routers

Рет қаралды 652,437

Күн бұрын

Take a look at the two smallest Raspberry Pi Routers in existence: The DFRobot IoT Router Board Mini and the Seeed Studio Routerboard!
Along the way, learn about networking, OpenWRT, and how these two routerboards stack up against each other.
Support me on Patreon: / geerlingguy
Sponsor me on GitHub: github.com/sponsors/geerlingguy
See my blog post with more links and data: www.jeffgeerling.com/blog/202...
DFRobot's IoT Router Carrier Board Mini: www.dfrobot.com/product-2242....
Seeed's Dual Gigabit Carrier Board: www.seeedstudio.com/Rapberry-...
GitHub issue for DFRobot Board: github.com/geerlingguy/raspbe...
GitHub issue for Seeed Board: github.com/geerlingguy/raspbe...
See all the PCI Express cards and CM4 boards I'm testing: pipci.jeffgeerling.com
#RaspberryPi #HomeNetwork #Router
Contents:
00:00 - Raspberry Pi Routers
00:55 - Tiny Routerboards
02:08 - Seeed Board overview
03:25 - DFRobot Board overview
04:24 - Getting OpenWRT working
06:24 - DFRobot test and benchmarks
08:54 - Seeed test and benchmarks
12:41 - WAP and WiFi Routing
13:28 - Verdict and 2.5 Gbps option?
14:17 - Outtakes

Пікірлер: 838

@RogerWilco1 3 жыл бұрын

Thank you for reporting energy consumption. This is really useful in RVs where running from battery power is a way of life.

@spudmckenzie4959 3 жыл бұрын

Also off grid solar.

@pinaz993 3 жыл бұрын

Living in an RV, you say? If your home is truly mobile, would you mind telling me about your WiFi reception setup? I know that RV parks are infamous for poor WiFi, but by and large, it's really not entirely their fault.

@RogerWilco1 3 жыл бұрын

@@pinaz993 Wifi is mostly useless, but a MOFI with a pair of 10DB omni antennas works great -- so far. a MOFI is a little linux box with cellular modem that provides a hardware router and wifi onboard, highly configurable. So not idiot proof like most products for the RV industry, but easy to use without reading the manual for someone like me who never reads the manual (but knows a lot about technology.) YMMV

@nexxusty 3 жыл бұрын

This device is PERFECT for a battery run home. Lol, buying mine in preparation for just that.

@pilabs3206 3 жыл бұрын

hahaha a 28 nm cuad a72 without crypto extension is the worst on energy efficiency fot a router...

@t1mmy13 3 жыл бұрын

I'm really liking where the pi ecosystem is headed with all these developments! Like, this kind of applications were always talked about but never truly feasible for every day use because of the interface limitations, now I finally really can consider using a pi as a router

@Vatharian 3 жыл бұрын

If Raspberry Pi 5 includes pcie 3.0 or 4.0 or even 2.0, but with four lanes, that's going to be MUCH more interesting. I kind of imagine RPi 5 coming with single OCuLink sticking out of the board...

@sebastianwendl603 3 жыл бұрын

I usually only use raspberries for messing around and trying stuff. Even the old "standard" raspberries are pretty awesome for this. But imagining the possibilities, some of the new stuff opens up... Warms my heart, thinking of all the things I will probably fail at sometimes in the future :)

@ole-martinbratteng4014 3 жыл бұрын

Take a look at Ivan's WIP for blade servers using the CM4 twitter.com/Merocle/status/1407684311344730117

@friedrich1277 3 жыл бұрын

@@Vatharian i hope that the Pi 5 CM will have the same connector like the CM 4 version, so you can keep your old "breakout boards"

@Vatharian 3 жыл бұрын

@@friedrich1277 If it will have different connectivity, like pcie x4 2.0 port, it will be bad. It all depends on its CPU, since they are targeting price point, not feature set. Other than that, just couple of days ago R Pi foundation confirmed they are working on RPi 4 A, but there is no work being done on RPi 5, neither prototyping nor design wise.

@LuxFerre4242 3 жыл бұрын

PuTTY is no longer needed for SSH on Windows. OpenSSH is built in as of April 2018.

@MrNeocortex 3 жыл бұрын

Yeah. Just use Powershell.

@waltherstolzing9719 3 жыл бұрын

@@MrNeocortex There's even an OpenSSH *server* on windows 10 nowadays; so it's possible to ssh (&sftp) into windows directly.

@muelleel 3 жыл бұрын

Windows is no longer needed. Everything can be done on Linux as of May 2021

@zaggery 3 жыл бұрын

old habits die hard lol

@tylercgarrison 3 жыл бұрын

Not at my computer atm so I can't easily check for myself.. But I'm running LTSC, which ends up being behind on some things. Do you know if it's in there?

@kurtnelle 3 жыл бұрын

Oh thank Goodness. Somebody's making a Pi router. Time to buy!

@andrewyoung8703 3 жыл бұрын

I hope you got your order in. Looks like they've sold out for now.

@kurtnelle 3 жыл бұрын

@@andrewyoung8703 Nope, I didn't make it in time.

@nigratruo 3 жыл бұрын

I would just use the standard Pi, much cheaper and more modular.

@nickadams2361 3 жыл бұрын

when this guy actually makes a product ready product is the day pigs fly. He's gunna stick to yt click bate

@frankearl9285 3 жыл бұрын

@@nigratruo : That depends on what you need/want out of said router. Like Jeff highlighted in the video...

@wallyhare8616 3 жыл бұрын

Love the bloopers at the end. Just shows a small amount of the struggle that goes into video production. Anyone that thumbs down does not know the struggle, time,& effort that goes into making a single video.

@Maybe-So 3 жыл бұрын

I was thinking the same thing. Jeff (and everyone else really) that makes a fantastic product, rarely does it in one go; it (apparently!!) takes HOURS to make a good presentation, particularly one with all the details that Jeff puts in his. Pretty amazing, Jeff - fantastic job. Thank you for sharing.

@Reevesi 3 жыл бұрын

Thanks for this. I had forgotten about my Pi's for the last year and now impressed with how it's going. I'm back in the game. Kudos

@peppekerstens 3 жыл бұрын

Stil loving your bloopers at the end.. and your valueble insights on anything cm4 of course 👍

@Anthestudios 3 жыл бұрын

Looking forward to your 2.5 Gb version. Loved this video and the production quality. Thanks!

@chrisb9319 3 жыл бұрын

I feel like the price would be a big no-no for me when things like the Edgerouter X for unter 50 bucks exist if you just need a good router and don't utilize the hdmi port, the usb ports or the GPIO pins.

@RaptorTila 3 жыл бұрын

Great info and test results, thanks for all the work.. and I love the out-takes, they made my day.. Keep up all the great work!

@CraigMullins1 3 жыл бұрын

Can't wait to see the 2.5 gig show!

@markabrams6286 3 жыл бұрын

Thanks. Great review of exactly the 2 boards I've been looking into!

@GeorgeMulak 2 жыл бұрын

You are amazing. What a lot of work and so well done! I love the bloopers at the end. God bless you.

@RyouConcord 3 жыл бұрын

So COOL!! thank you for these in depth reviews. I've been hoping for things that would replace my glinet mini router.

@AshishPurohit 3 жыл бұрын

Great work as usual Jeff. I get to learn a lot even though I'm not planning to use a pi as a router. Thanks!

@talbech 3 жыл бұрын

Awesome review and thanks for sharing. Regards from someone who built (cross-compiled) tiny Gentoo systems for Soekris hardware back in the days for multi-wan routers.

@tramcrazy 3 жыл бұрын

Wow, what cool little router boards! Great video Jeff 👌

@SomeTechGuy666 2 жыл бұрын

Fantastic content. I happen to be in need of a mobile, small router for in field use. Your video just saved me a lot of time and headache.

@kennethconnors5316 3 жыл бұрын

very impressive video, well thought out and edited ,you answered "EVERY" possible question I had .. "WELL DONE"

@CocoaBeachLiving 3 жыл бұрын

As an 'old timer it dude, I thought I was done with this level of fun.. I like the way you help people understand the pros and cons of these boards.

@JeffGeerling 3 жыл бұрын

Thanks! What's old is new, and all that jazz-I see a lot of people getting back into the 'build your own' game these days, probably as a knee-jerk reaction to how much modern computing platforms are getting locked down. The big difference is unlike 20-40 years ago, you can get the equivalent of like 500 back-then cray supercomputers at your disposal. Makes things a lot more fun (IMO)!

@CyberBlaed 3 жыл бұрын

Love the bloopers. I mean, i love your content but the bloopers are too fun aswell. :) Stay cool Jeff!!

@mcdermg 3 жыл бұрын

Another great video and the bloopers always make me laugh. Sterling work as always Jeff

@jeraldtowle2718 2 жыл бұрын

Really appreciate the outtakes. Keeping it real.

@naumanshakir9344 3 жыл бұрын

Have been looking to made a OoemWrt router using Pi since too long, this video covers it all!

@GeoffreyHowells 3 жыл бұрын

Network/Admin flashbacks... Great videos. Keep them coming :)

@bennyfactor 3 жыл бұрын

Love your videos, Jeff. They are succinct and informative and pleasant. Really need to get into the raspi ecosystem after I got burned on edison a few years ago

@zac_in_ak 3 жыл бұрын

Can't wait for the one with the 2.5g board. Love your stuff. You are the only KZfaqr that I have all notifications on. keep up the great work.

@leftblank 3 жыл бұрын

Another amazing video Jeff. Thank you

@CrisanBogdan 3 жыл бұрын

I believe you can get really good value switches or routers but, having a RPI like this to play with OpenWRT is heaven on earth Low power consumption, ability to use part of the router in other projects (I'm talking about the CM4 board) and the software supports that will keep on growing over time is very nice! Also, did you have a look at Banana PI R2?

@ats1995 2 жыл бұрын

Great you include FLENT for network testing. It gives a great details over performance!

@baganatube 3 жыл бұрын

I and my Pi 4 and a couple of USB-3 ethernet dongles under my desk were waiting for this video. Thank you for making it!

@randomunavailable 3 жыл бұрын

I've been using a p3b+ as a router for years. I don't have or need gigabyte speeds so it's worked perfectly for my needs.

@ul7987 3 жыл бұрын

Man this is all foreign language to me, but I love it, LOL! This things are getting better and better with the performance and technology out of the box!! I'm learning so much from your videos, thank you for your dedication and passion to the community!

@JJE990 3 жыл бұрын

5:53 "or if you're using PuTTy on Windows" Whilst using PuTTy is perfectly valid, Windows now natively supports SSH in the command prompt. You might have to enable it in the system settings but it's there :)

@JeffGeerling 3 жыл бұрын

I didn't realize that but will have to check it out soon!

@minxythemerciless 3 жыл бұрын

Also of interest is the nano pi r2s dual-homed router. It works well at 1 Gbps on both ports. It's capable of 2.5 Gbps but under armbian the present driver is unstable. I've run an R2S for quite a while now and using the excellent heatsink case I've never had any issues. It just works well

@robertvernon789 3 жыл бұрын

Dope vid Jeff! Thanks!

@GustavoMsTrashCan 3 жыл бұрын

I'm gonna yoink the dfrobot one before it runs out of stock. Thanks for sharing!

@JeffGeerling 3 жыл бұрын

I'm hoping they can keep these in stock a while!

@BowenMarmot 3 жыл бұрын

@@JeffGeerling Out of stock as of at least a couple hours ago.

@nexxusty 3 жыл бұрын

Lol, nope. I ordered anyway, better get it within 2 months or I'll just cancel.

@Badg0r 6 ай бұрын

Oh wow you're looking young in this video. I've seen almost all of your videos UpTo now, and saw this one which I haven't seen. You're the best.

@jamestschirhart269 2 жыл бұрын

I currently have the DFRobot router board coming in the mail so i cant wait to play around with WRT again!

@thomaseboland8701 3 жыл бұрын

This reminds me of the 25 year old LPR - Linux Router Project. To build your own router then, you took an older computer, and added two or more 10/100 Ethernet cards. Gigabit ethernet was new and expensive, and only really viable for cheap projects like this after the year 2000. You would set one config file on a floppy and boot the entire computer with only one 1.4MB 3.5" floppy drive. That was both OS and config. Bigger than the Pi for sure, but at time it was revolutionarily cheap. Routers of the day were hundreds of dollars and specialty equipment.

@JeffGeerling 3 жыл бұрын

Yeah, I remember thinking Gigabit was exotic when I was still installing 10baseT and fancy 10/100 cards in some servers back in the day. 1 Gbps is so common and cheap now... makes you forget how slow a congested old network was-floppy-disk-like speeds over the network were common!

@ecotts 2 жыл бұрын

Excellent video as usual

@topperdude2007 3 жыл бұрын

Great video as always! I was seriously considering getting the DFRobot to try / play around with till I saw they jacked up the price by 50%. I mean, $45 for the SEED seems reasonable since it also has the additional capabilities of potentially doing double duty as a NAS as pointed out in the video - so not sure how DFRobot can justify jacking up the price. I know Jeff pointed out the slower throughputs on SEED but that should not be an issue for folks with say 500Mbps or lower speeds. Anyway, keep up the great work, Jeff! 👍

@xxportalxx. 3 жыл бұрын

Meanwhile the avg internet speed in my town is like 1.5Mbps..

@jfbeam 3 жыл бұрын

Chip supply. The SEED may be cheaper, but it's a USB hub, which sucks.

@D9ID9I 2 жыл бұрын

It has crappy 1Gbe downlink to your switch. What NAS are you talking about? That's a nonsense. Imagine you ul/dl something to/from NAS and that will shut down your internet completely. Silly idea.

@auto117666 3 жыл бұрын

+100000 for great documentation!

@melon095 3 жыл бұрын

Incredible video. good job!

@niklasxl 3 жыл бұрын

cant wait to see what you come up with as a ap :D hope its a low budget decent option :D

@AMFLearning 3 жыл бұрын

My best scenes whole thing in the KZfaq Mr Jeff is the end of this video, Mr Jeff has repeated taking a scenes 👍🏼👍🏼👍🏼👍🏼 All your video is good and it is inspired amflearning by doing Thanks alot Mr Jeff 🙏🏼

@jimbojonesporfavor 3 жыл бұрын

Thanks for this - really useful!

@rajathgeorgep Жыл бұрын

Fantastic Hardwork. Very informative

@deplorablesecuritydevices 2 жыл бұрын

Great content!

@AdamBGames 3 жыл бұрын

EYYY, our boi started using a skirt on his 3D prints. Im glad you were able to fix your issues.

@cakemnstr42 3 жыл бұрын

dang. don't want your Raspberry Pi 4 Model B to be off center. Good thing you caught that!

@rhaijel 3 жыл бұрын

wondering if this can be used as an alternative for pfsense captive portal where ETH1 goes to your ISP and ETH 2 goes to a secondary router. Like the ones used in coffeeshop wifi.

@mohammadmekayelanik7408 2 жыл бұрын

Waiting eagerly for the duel 2.5Gig networking video! Hats up Jeff. :)

@mitcoes 3 жыл бұрын

Will after the 2.5 Gb come the 10 Gb one and then the 10 GB + NAS / with 8 SATA interfaces?

@JeffGeerling 3 жыл бұрын

Heh... 10 GbE is coming soon too; already have it working-though max throughput is sadly limited to 3.42 Gbps due to the Pi's PCIe x1 Gen 2 lane :(

@mitcoes 3 жыл бұрын

@@JeffGeerling Would a pine Rockpro64 or any other RK3399 SMB such as khadas or SmartFly ones with Pcie x4 Gen 2.1 lanes be able to be faster?

@gorudonu 3 жыл бұрын

that would be great !

@pfabiszewski 3 жыл бұрын

@@JeffGeerling waiting for Pi 5 I guess ;)

@lewddrip5383 Жыл бұрын

bruh until now i was just reading your books and appreciating how you explain everything so well and only now i found out you have a youtube channel???

@RfdAviator85 2 жыл бұрын

I just ordered a CM4 with Wireless, 4GB ram, and 32GB eMMC and the DFRobot bundle - cant wait to make this my primary router for the fibre coming into the house

@dimitris470 Жыл бұрын

I use edgerouter most of the time, but the normal pi4 is awesome for router duty. I've been using mine as a backup router on my home network, when my DSL dies. Either through its wifi and my phone in hotspot duty, or through a 3g usb modem. Openwrt works like a charm with minimal fiddling

@lahmyaj 3 жыл бұрын

Always interesting videos mate ;)

@iamashyura 3 жыл бұрын

Thank you! U got my interest on dfrobot.

@AdamShumpis 3 жыл бұрын

I'd check out the NanoPi R4S 4GB if you're looking for a robust OpenWRT router for gigabit connections with SQM.

@zadekeys2194 3 жыл бұрын

I wish dual nics were more common ie on larger (workstation) laptops, on the pi etc. I'd love to see a firewall like Untangle /pfsense running well on a 12v tiny router. The masses need a decent plug and play solution.

@vladlisichkin7347 3 жыл бұрын

Video is great, as always)

@programmerarnab9046 3 жыл бұрын

I always love you making videos... I appreciate your and your brothers efforts on making the videos .. also tell your brother to not cut those pi's it hurts

@nunux75 3 жыл бұрын

Many thanks for this great video. Did-you manage to get the pci eth of DFrobot work with raspbian ? I tried many drivers without success … also printed case, but too small for CM4 with radiator …

@randomdebris 3 жыл бұрын

This might make an low power transparent bridging firewall (TBFW) if it can do a deep package scan fast enough?

@dluckie747 2 жыл бұрын

hey man great video, As a long-time networking nerd still gnawing at the idea of finishing my CCIE, one thought was to perform UDP based iperf to get TCP windowing and retransmissions out of the way.

@zambonidriver42 3 жыл бұрын

Outtakes! Woohoo! Good times.

@jannikmeissner 3 жыл бұрын

Nice! I guess I’ll still look at X86 for my planned Vyos build since I need multiple wan and lan ports, but this could be a cool thing for some other project

@tylerb3797 2 жыл бұрын

so what would you recommend for doing synchronous gigabit cake qos using openwrt? my downstream gets around 30ms bloat on the downstream but 150ms of bloat on the upstream. Thanks!

@spy.catcher 3 жыл бұрын

amazing..if you have the time, would you please also show or guide us on how best to use tailscale/taildrop on pi clusters or even virtual clusters locally and remotely. ur way of explaining is easy even on these geeky home lab configs.

@trbolexis 3 жыл бұрын

Ive got a Pi4 setup as a router (OpenWRT) using its single gigabit port - setup with VLAN through a managed switch for connection to WAN and LAN. Speeds hang out at 930s Up and 840s Down on ATT Fiber.

@rekkenberX 3 жыл бұрын

Hi, have you seen the Nanopi r2s? If so, have you done test on it? I'm planning to buy one as my next router so I've been doing a little research on the side but there's only a few video on KZfaq about that device

@catalinalb1722 3 жыл бұрын

Hi, I would like to run a throughput test with iperf between two raspberry pi 4 connected over bluetooth. Do you know how can I assign IP adress to bluetooth? and how to set up the connection? Thank you

@rullywow3834 3 жыл бұрын

Great vid as usual! I would be curious comparing these offerings to the single board mikrotik solutions. Some mikrotik router boards are about $50 and are similar. More red shirt Jeff!

@ig_foobar 3 жыл бұрын

+1 to that. Mikrotik products are awesome.

@paulmichaelfreedman8334 3 жыл бұрын

for a year now, I've been running a Pi4B as openwrt router with VLANS uplinked with a single Gbit cable to a Layer 2 managed switch. One port on the switch goes to a 500/500 Fibre optic media converter. It works absolutely fabulously, no hiccups, lightning fast DNS (unbound) and full 500/500 speed despite SPI. It has completely replaced the standard router(zyxel) supplied by the carrier. The line between LAN and Internet has faded nearly completely.

@pabloj.villarruel7114 3 жыл бұрын

nice review!

@kvkrishna143 2 жыл бұрын

Hello Jeff, precise explanation/comparison on both the boards. Could you possibly test the outcomes for pfSense and pihole on these boards?

@workyz1980 3 жыл бұрын

You are best of the best! And thanks for simple english!!

@richardhockey8442 Жыл бұрын

things I didn't expect to see appearing the same shot: a hacksaw and a raspberry pi :)

@shashankgurujala 2 жыл бұрын

Can you please share the steps to setup eth0 LAN and eth1 WAN ports. I am getting local internet connection to ETH0 but not connection from WAN eth1 port

@kingtungstenworldwide4472 2 жыл бұрын

If you made a print server to work as a photobooth printer, which model would you choose? And is there a script that can compete with a windows 10 printer?

@darrenb1367 2 жыл бұрын

What's the minimum spec Compute Module 4 board that would be needed for the DFRobot router? I want to get the kit for this but the only wireless CM4 board that's in stock is the 2GB Lite version. It's that good enough?

@danroberts2055 2 жыл бұрын

I have 240 devices on my network, Some are the new wifi light bulbs that are controlled by Google Home. It's a nightmare to keep these devices attached as the router running DD-WRT just can't seem to keep up. I have a Linksys 3200. I wonder if this solution will work. I may just break everything down into two separate networks but no time to play...

@nothingincommon 2 жыл бұрын

What if you just want to use one of these as a standard IO board, and dont need any router functionality? For instance, I am hoping to build an mt32-pi hat for my mister FPGA and the device requires a pi with gpio on it. Could i simply combine CM4 with this board to get gpio on my CM4?

@RAZREXE 3 жыл бұрын

Recommendations working fine again

@jonstapleton3668 2 жыл бұрын

Thanks for this great video! I'm very interested to learn about WAP options.

@Elfnetdesigns 3 жыл бұрын

I got that beat with an ESP12E as a router / wifi repeater

@_kwak 3 жыл бұрын

I've been looking to use a pi zero w as a wireless router out and about to connect multiple wireless clients to each other for LAN connections. This is a perfect project for inspiration and further research, thanks. Edit: I don't need high bandwidth or anything intense, it would mostly be used for Nintendo switch gaming TCP packets that don't care about data integrity and are not overly large.

@lucdig 3 жыл бұрын

Thanks Jeff, does any of the 2 board have packet hardware acceleration?

@QuestionTheTruth 2 жыл бұрын

Ooh! a hardware firewall / pi-hole! ^^ I need to get one of those, so I can reroute the traffic. ^^

@adambulenda9099 2 жыл бұрын

Hi Jeff, any ideas how to extend the Router Carrier Board Mini with WiFi capabilities or with LTE/GSM module and still have it inside the same case as Router Carrier Board Mini?

@gorbek 3 жыл бұрын

If anyone's looking for a minimal linux based OpenWRT gigabit router, consider the NanoPi R4S using FriendlyWRT (based on OpenWRT). It uses an RK3399 so it's not quite the same as these PI based routers but it has great performance and you can get it with a passively cooled metal enclosure. It's great.

@LiLBitsDK 3 жыл бұрын

love all that tiny stuff I can tinker with myself... screw buying a "premade" router where is the fun in that?

@JeffGeerling 3 жыл бұрын

This is the way.

@NickBouwhuis 3 жыл бұрын

For sure. I really like my pcengines apu4 board

@IncertusetNescio 3 жыл бұрын

I love the idea, I dislike the headache that caused twice (on successes, excluding failures) when I built my own out of a pile of desktop parts. Worked well when it did, but broke like a house of cards any time you had to touch it. Great if I can set up a separate tinker lab and it isn't my own home LAN at stake. Definitely more fun that way and I get to learn stuff.

@nickadams2361 3 жыл бұрын

@@JeffGeerling make a for real production ready product for people. This is half ass work and annoying. All your videos are just look it works on a pi then you move onto the next half ass video. Put real effort and perfection into these. literally anyone that is can sit and ask questions at google for 30min could make these videos. please put in more effort and thought

@pavan13 3 жыл бұрын

Interesting Topic this video i wanted for a long time

@MagicGriffin 2 жыл бұрын

I was going to use my Raspberry Pi model 3B as a backup router/signal booster... will it still be any good even with the slower ethernet port?

@c2h2c2h210 3 жыл бұрын

great video!

@videoinformer 2 жыл бұрын

It's humble of you to show bloopers at the end, without which we'd be convinced you were flawless! This also shows the diligent work you put in to produce a flawless end production, as easy as you make it look.

@khalifdove7955 3 жыл бұрын

Dumb question but could I get some help here, could I potentially use the DfRobot to host the cluster I'm clustering to just two pi B's together for a robotics project would it be reasonable to use one of these boards for that pie cluster? Thank you to whoever answers have a wonderful day and cheers!

@Dazdigo 3 жыл бұрын

Could you try to get Docker running on these boards? I would love to have Lancache running on my router.

@Bobby-kv4gc 2 жыл бұрын

Is there a forum for the DF Robot board? I am experiencing a weird problem with the DF Robot Router boards which I can't explain. I am using the 'Lite' version of the CM4 module and can't get either the board to work as a router, or get the serial debugging to work. When I put the same memory card into the CM4 IO Board it boots up fine and the serial interface works but not with either of the DF Robot boards I have. Anyone have any ideas or can you point me to a forum where I can ask? Thanks! (I should add that the DF Robot forum isn't really organised by product so it's hard to know where to place a question there.)