Hackberry-Pi_Zero – A handheld Linux terminal using Raspberry Pi Zero 2W | Hacker News Reader

Hackberry-Pi_Zero – A handheld Linux terminal using Raspberry Pi Zero 2W

github.com

579 pointsfelixr158 comments

This looks like a pretty cool device!

However, I was immediately curious about how the "dual battery" feature works. The IP5306 power-management IC seems to be designed only for a single battery, and as far as I can tell from the schematic[1], the two battery connectors are just directly connected to each other in parallel (across VBAT and GND).

This seems really sketchy. If you plug in two batteries that are not at the same state-of-charge, then you're going to get a very large current flowing from the higher-voltage battery to the lower-voltage one, probably significantly exceeding the batteries' rated current limits. At best this wastes a lot of power and generates a lot of heat, and at worst it could be a fire hazard.

[1]: https://github.com/ZitaoTech/Hackberry-Pi_Zero/blob/main/Sch...

I was going to launch into a lecture about how battery isolation is a Thing, very simple, etc and the author couldn't possibly be dumb enough to not isolate them with diodes, but then I looked at the schematic and yiiiiiiiikes, they're both just tied together, I think. There's a charge management IC and a MOSFET as part of the USB power input...and that's it.

I was sketched out by BSI not being connected to anything, but it seems it's a fixed resistance battery size/chemistry ID function, not a temperature sensor. That said, I don't see any over/under temperature protection except for some sort of vague temperature limit in the charge IC (which is not thermally coupled to the battery in any way, so only a general "the device is way too hot"), so hopefully that's in the battery - don't go buying any cheapo clones.

I also don't see any fusing, which is a huge no-no. A polyfuse is a twenty cent (ish) part. Again, an official battery would have an internal BMS circuit and prevent overcurrent events, but people are probably going to go for the almost-cheapest battery on Amazon/Ebay. Not to mention counterfeit problems even if you do try to get an OEM battery.

Oh, houses can burn down by not putting in 2 diodes and ptc fuses

I agree, this is a pretty bad idea. I've used batteries in parallel many times, but it's always in the context of treating it as a single "bank" that is always charged at the same level, not as individual batteries which can be swapped separately. Swapping a full battery in when the other one is low is going to result in a rapid rebalance of power until they get to the same level!

You can think of it like having two big swimming pools side by side, slowly draining out into a little stream. If the two pools are at the same level and the wall between them disappeared, they're largely going to be fine and keep on going.

Now imagine one pool is nearly empty and the other is full. As soon as you disappear that wall in the middle, there's gonna be a very powerful wave as the water from the high pool rushes in to fill the empty pool.

At best this wastes a lot of power and generates a lot of heat, and at worst it could be a fire hazard. - you just described my high spec HP laptop.

It looks like two BL-5Cs, which normally come with their own overcurrent protection (AFAIK even the no-name generic clone cells do), so what's more likely to happen is you trip the protection on one of the cells being swapped. Fortunately these are not very high capacity nor current cells, being ~1000mAh at most. They seem to be pretty robust in general, as a series of hugely popular MP3/MP4 players that used them had nothing more than a diode from USB5V for charging.

On the other hand, I'll gripe about that "schematic" being not actually a schematic but just loose parts with labeled pins.

Barely more than a netlist.

It has no solar panels , runs shorter than my cell phone on a single charge. It is thick. No ethernet socket Any small UMPC is better than this thing. I don't mercifully mention the blobs encapsulated in the raspberry pi itself.

It’s got usb-2.0 ports though, you can get an usb-ethernet adapter if you want

for power?

I understood it as it'll use only one of the batteries, but you can swap between which is used. So initially, you have two charged batteries, while using only one. Once you run out of power in the first one, you'll switch to the second, and now the first one could be swapped to a fully charged one. Blue/green deployments, but for batteries basically.

It would be convenient if it worked that way, but since the batteries are connected across each other in parallel, they will both be discharged simultaneously. And as soon as you hot-swap one of the nearly-discharged batteries for a charged one, it'll be more-or-less short circuited across its discharged counterpart.

To do what you describe, you would need additional components to "switch" one battery at a time into the power path. (This can be done with a single transistor if you're only worried about current flowing in one direction, but I believe it's trickier if you want to support both charging and discharging in the same circuit.)

I asked the following above - does this work?

>> A mid-stream capacitor is holding enough charge for 10 seconds to allow indivdual swapping out -- and also this is meant? to mean that you can swap TWO NEW batteries in without having to shutdown/sleep/power interrupt - thus the 10 seconds.... that dope

EDIT: I was imagining the capacitor holds up the whole thing for ten seconds to swap out both bats...

In theory you could do that, but it has its own costs and complications. And if you're going to add a big enough capacitor to ride out a battery swap, why bother with two batteries instead of just one?

Hotswap of two parallel batteries must replace both with a matched pair. Otherwise the one at higher state of charge starts charging others without current limit.

null

Yes, that is exactly what I said at the beginning of this thread.

I read this part:

> Replace your battery in 10 seconds without killing the power!

as a suggestion that you'd have four batteries total, and you'd have two that're fully charged, and you'd replace one battery, and within seconds you'd replace the other. Or at least that's how I'd do it.

I've recently read up about power management and battery charging, and want to make a charge controller than can connect two separate banks. I wonder how hard it'd be to change the IP5306 in the Hackberry Pi Zero to handle the two batteries separately.

And if you screw up which battery is which?

"Do things exactly right, quickly, or the device bursts into flames*" is not acceptable electronics design, even for something you intend to use yourself.

* do you really want to trust a generic battery's built-in protection IC?

Maybe I’m being too generous but I feel like 99.9% of the people using something like this would do it properly

Now that I'm aware, sure. If I wasn't told, I would assume that they were designed so that a new battery could be swapped in while one battery remained inserted to maintain power (much like an old Thinkpad I used to own).

.. until their curious child decides to have a look at it.

If there's a capacitor... what about adding a switch to allow you to select which battery you are using? Then you can replace whatever you are not using without issue.

A mid-stream capacitor is holding enough charge for 10 seconds to allow indivdual swapping out -- and also this is meant? to mean that you can swap TWO NEW batteries in without having to shutdown/sleep/power interrupt - thus the 10 seconds.... that dope

It should definitely use the plural, batteries, if that's the intention.

acktually, traditionally, 'batteries' referred to two or more cells. This keeps with the etymology of the word as an emplacement of cannon or guns. If OP meant a single cell, they should have written 'cell', not the singular 'battery'.

People often do this on their boat, but with 100Ah batteries and those rotary switches that select between "1, 2, BOTH".

They don't realize how much current can flow if they slam it to "BOTH" when two batteries with very different voltages are connected.

I'm not understanding the appeal here. Why use this instead of a regular smartphone?

If you ran it with one battery would you not have the problem ?

There's no problem if you use one battery, and there should also be no problem if you use two batteries and charge/discharge them both simultaneously (because then the voltages are matched).

The problem shows up when you try to "hot-swap" just one of the batteries and replace it with one at a different state of charge, as the README claims you can do.

What is the expectation here about functionality? They are using some kind of COTS battery system to keep the cost down, but at the consequence of this safety qustion. Should these people expect any buyer to antipate this? Its not really a consumer product after all.

I think there is no shortage of battery management ICs, but the number that can arbitrate between external power/battery A/Battery B certainly eliminates 97% on your Digikey parametrics.

IMO my expectation is that they not do that. If they want to offer hot-swappable batteries, they should either do it right (with a more functional battery management IC or a little homebrewed FET-switching circuit), or they should at least come up with a hack that doesn't threaten the battery safety. For example, have a physical switch to select between the two batteries and instruct the user to flip it when one gets low. Use a super capacitor to cover the short time while the switch is between connections.

For example, with this part:

https://www.analog.com/media/en/technical-documentation/data...

It feels to me that the fact that there are no readily available BMS chip that supports this type of circuit indicates something. But maybe I'm mistaken...

What about having 2 diodes and problem solved

Oh great! Another awesome looking cyberdeck that I want to own and will find absolutely no practical use for.

I've added myself to the waitlist already.

See I do have a use for this kind of thing, but not exactly. I have a few desktop towers and Raspberry Pi devices that sometimes due to upgrades or random acts of Zeus absolutely fail to boot up. I want some ability to connect a keyboard and a screen to these so I can see the actual boot screen. Normally for me this involves lugging the device to my office and connecting it to my office monitor and keyboard which is highly inconvenient given that some are in the attic. Instead I want a small screen and keyboard in one device I can hook up to an HDMI or VGA or mini HDMI or just a serial port + USB for keyboard. Something lightweight I can carry anywhere.

And no that doesn’t need its own computer but it might be nice to have one to be able to hook it up to the network and download and transfer files to the broken machine or be able to download and quickly boot off a rescue image or some such.

These are rare enough problems that I don’t actually bother building a device like that but every time they do happen I wish I did.

I too have this use case troubleshooting headless computers around the house. I saw an ad for https://www.aurga.com and bought one for $84. It connects to an app on my Android phone as display, keyboard, and mouse. Minor discussion 7 months ago: https://news.ycombinator.com/item?id=38609526

Long ago I bought a mini keyboard + mouse combo for input; the custom wireless USB dongle edition I have (strongly preferred over Bluetooth when troubleshooting) is no longer for sale. https://amzn.com/dp/B00I5SW8MC

This looks quite interesting, thanks for the link. It does seem to require a native viewer instead of having a web interface. I would really prefer just a website like the PiKVM. Might still get it.

I have to do an off-topic rant though. The marketing page you linked to does not really state what this device does. It has a nice look into the case and a lot of buzzwords, but nothing like a small section with "HDMI Input" or "USB keyboard emulation". Even the shop page is somewhat light on details, but it at least shows (in GIFs only) that it works as a display and has a USB port. If I wasn't given your comment as context, I would likely not have gotten the use case and closed the tab. Based on the form factor being similar to a Fire TV stick etc. I would have assumed you plug it into a Hotel TV or similar to work on that.

EDIT: Saw your edit now and I think it is kind of funny that the old HN thread is also mentioning the marketing.

Looks like those mini keyboards are available on AliExpress quite cheap!

https://www.aliexpress.us/item/3256804879544433.html

If you don't want to spend a lot of money on this:

1) Get a Bluetooth adapter.

2) One of those cheap Chinese keyboard/mouse combinations like the one you linked (the are many more).

3) Get a cheap Chinese portable monitor with HDMI/USB-C.

4) Optionally, a powerbank for the monitor. Or get one with a battery.

You'll be done with a similar price as this 'Aurga'. Back in the Nokia days, you could use Nokia Linux device as a remote keyboard/monitor/mouse, too. So e.g. Nokia N800/Nokia N810 a better cyberdeck than a Sharp Zaurus.

Logitech has similar devices. This isn't the one I own, but it's close.

https://www.amazon.com/Logitech-Wireless-Keyboard-Touchpad-P...

I have that keyboard and gifted one to my parents. Our use case is the odd chance you need to input text or use a browser on a Smart TV. Works so much faster than the on screen keyboard. With many Smart TVs just being Android under the hood, it just works.

I find for server troubleshooting, I usually have no problem grabbing a random USB keyboard. The bigger problem is finding a screen at a convenient location and connecting that one. It often was easier to carry my server to the screen instead of the other way.

On the topic of niche input methods, I also have an "air mouse" [1] with a full keyboard on the back for my Kodi system or when connecting my desktop to the TV. I essentially never need to use it, but it has come in handy.

[1] https://www.amazon.de/gp/product/B0B1HKWFQV

The iPad now supports external webcams, so you can use a $5 HDMI capture card (and the free Genki Studio app) to turn it into a monitor.

I have one of these and it's great for this sort of thing. The whole keyboard runs off one AA battery which lasts forever, and it even has a storage spot for the USB dongle.

Those combo devices are incredibly useful in a pinch -- I keep one in my backpack. I've used it countless times while working on interactive installations and also while messing around with Pis at home.

On the other end of the spectrum, searching https://hn.algolia.com/?query=handheld%20comments%3E0&sort=b... I found the $1000 8" GPD Pocket 3 which supports Windows 11 and KVM discussed in 2021: https://news.ycombinator.com/item?id=29110603

https://gpd.hk/gpdpocket3

iPad + HDMI input dongle can be an HDMI monitor. iPad + GetConsole app + Redpark [1] USB-serial cable = serial console. The missing piece is USB keyboard emulation, but serial->arduino [2] might work.

iPad + $40 RISC-V piKVM-alike [3] is another option.

  [1] https://redpark.com/usb-c-serial-cable
  [2] https://www.sjoerdlangkemper.nl/2022/11/16/running-etherkey-on-arduino-leonardo/
  [3] https://sipeed.com/nanokvm

I have this exact same problem. I wonder how they solve this issue in datacenters and if that solution could apply to the home setting.

From what I understand, KVM setup is what is used. In the olden days it used to be a keyboard and monitor in every rack with a switch to connect to all the machines in the rack. Nowadays I’m sure it is more software than hardware but same principle. A home setup would be a laptop form factor device that can take in different video inputs and has a keyboard. A mouse wouldn’t even be required but I guess wouldn’t be hard to add. It would need a battery for the monitor but really would need no brains at all.

Another option would be a computer that can do video in and act as a USB HID for the keyboard/mouse but then allow you to connect to it via VNC. This really could be amazing if you could just plug in two cables and then go to your laptop to connect to it.

$40 RISC-V networked KVM for remote 1080p 60fps video, keyboard and power control, 2" cube, https://sipeed.com/nanokvm

Sadly, proprietary firmware makes it useless.

Ouch, which components on the board are closed/undocumented?

They make USB KVM devices. Run an application on your computer to send input / receive output. Then you can use whatever laptop you want. That said, I've only used them on Windows, so drivers might be an issue.

Would that work with a BIOS? Boot loader?

Yes, the pikvm (or nanokvm) devices are cheap KVM over IP and they take input from the HDMI output of the server/pc, so you see just the same as you would if you were stood in front of the physical monitor plugged into the HDMI. They also come with the motherboard connector so you can do a power-off/power-on remotely. You can change BIOS settings and even do a full OS install remotely.

Probably just intel chips slowly frying themselves like everyone else. Don’t bring Zeus into this.

I picked up a used 7 inch “dslr monitor” with hdmi input for about $99 I keep it in a cheap harbor freight pelican style case.

I _think_ you are describing (minus the screen) what a PiKVM and similar would give you.

I can confirm that getting a PiKVM has very much eliminated lugging around my server or a screen. Having some form of display input would be the one feature I would wish to add if given the choice. Not having HDMI-In, e.g. via capture card, makes sense in this form factor and power budget, but would make this an instant buy for me. I would really enjoy having a small, very portable device to debug things with.

I recently got linked to a CCTV tester [1] that at least handles the display part. Sadly it does not seem to have keyboard emulation. It might be possible to hack this in as this is an Android tablet at its core and the USB controller might support gadget mode.

[1] https://www.rsrteng.com/products/ipc-9800movtadhs-pro

take a look at the gpd pocket 3, with kvm module. sounds exactly like what you're looking for

What You thing about linux handheld like Sony Clie UX 50 ? Good keyboard, nice screen and camera, long time working.

Yes, I'm dreaming too.

My pet peeve with RasPi for these types of handheld projects is that they don't support suspend, and don't have a true poweroff state. Even in poweroff, they sit there consuming a bunch of current.

Beepy is a similar project that uses a RasPi Zero, and their approach is to cut power to the RasPi entirely with a management MCU. On my Beepy, I switched to a Radxa Zero instead and ported over any relevant kernel modules and device tree overlays, because it has an Amlogic SoC that actually supports suspend.

Am I right in assuming it's fairly straightforward swap hardware wise? Do you have any measurements of the difference in battery drain between the two? Is it a fairly recent kernel?

With that Sharp memory LCD and proper suspend that's potentially a gamechanger for the beepy. Any direction you can point me in appreciated.

Hey, sorry for the late response. I posted my notes here: https://github.com/Hylian/beepy-radxa-zero-notes. It's a straight swap hardware-wise, and for software, you just need to build/install the kernel modules and configure some kernel boot arguments.

Feel free to ask in the Discord if you have any questions.

Ditto. I’ve wanted to get a Beepy for a while, and I have a Radxa Zero already.

what is better? for ssh?

I'd love to learn more! I'm one of the Beepy creators...I just emailed you

Back in the day, the Nokia N770/N810/N900 line fit the bill for this perfectly. Its form factor was perfect for the "Linux terminal in your pocket" use case.

Might be something to look into for design inspiration.

I miss them so much. Even the N9, which lacked a physical keyboard, was so nice. A planned N9 variant with a sliding keyboard was never released once the series was discontinued.

It was so refreshing to have a mobile that acted as a regular Linux machine. You could copy files from your other computers normally just using scp.

Or tweak the GSM radio, as you would do with any other device, just using ifconfig.

To this day, I am disappointed that Maemo/Meego didn't prevail in the mobile OS market, same thing with Palm/HP's iteration of webOS.

It was truly a great experience being able to use your standard Linux tools as first-class citizens on your mobile devices.

Very similar to the Beepberry. Exciting to see someone else building into that form factor. Also love to fun to see the Nokia BL-5C battery (originally introduced in the Nokia 3650 in 2003) still alive and kicking 20years later.

https://blog.beeper.com/2023/05/16/beeper-x-sqmfi-beepberry/

That appears to have been renamed to the Beepy, and the product page now has the repurposed Blackberry keyboard blurred out. Did whoever owns the corpse of Blackberry go after them for trademark infringement?

https://beepy.sqfmi.com/

Is this when they start pre installing QNX? https://carleton.ca/rcs/qnx/installing-qnx-on-raspberry-pi-4...

It looks cool, but I've found the Steam Deck is the only portable computer that's versatile enough for me to actually use for all sorts of different stuff.

Anyone know if steam deck can act as a USB OTG keyboard?

I remember this being a cool feature of those GPD Pocket computers. It would be cool to hook something up to the USB and send keystrokes from the steam deck (not necessarily from the touchscreen keyboard, but by scripts).

you have to enable USB Dual-Role Device in the BIOS settings for it to act as a device, but yes.

ah thanks for that. I was searching for OTG not DRD

This is cool https://github.com/Frederic98/GadgetDeck

>> Steam Deck is the only portable computer that's versatile...

Would you clarify your categorization?

I personally consider 'portable computer' to be any computer with an internal battery (including laptops etc). I don't find the Steam Deck especially versatile in that category.

A separate/sub-category for me would be 'pocketable computers' (like this Hackberry-Pi_Zero, the GPD Win mini etc) for which the Steam Deck would be unusually versatile—albeit the Steam Deck does NOT fit in any of my pants or jacket pockets.

Has anyone built something like this in the hiptop/sidekick format?

If not, this might be a good second option for hacking together a chat device for LLMs with notes

I had been thinking about using https://www.lilygo.cc/products/t-deck as a base - but prefer using Linux to microcontrollers

I miss my Hiptop(s). Nothing has come close to that experience since. I could carry on 10 AIM conversations, IRC, and be doing browsing and email while typing at ~100 WPM.

Such computers are cool, but fat and inconvenient. I don't understand why decent companies like ibm, samsung or others won't make a Linux handheld seriously. With a good processor that will be power efficient and run for a long time on a single charge.

Terminal and ssh will suffice in many cases. People a lot of time used only terminal and live.

Because there's no money to be made from such devices

2023 Pixel tablet can run GrapheneOS and supports Android Virtualization Framework (pKVM) for real Linux VMs alongside Android.

Would love to see "real phone" version w gsm/lte module and at least a day lasting battery (optimization)

Isn't that what the PinePhone and Librem 5 are? They don't have an embedded physical keyboard and do have a touchscreen, so the physical features are slightly different, but otherwise they are still a mobile ARM linux computer.

The touchscreen is a big difference though. You need to run some kind of graphical environment to handle the touch input and then it's slow and you have a crappy keyboard. I love my pinephone, but even with sxmo I find it unresponsive and hard.to work on. The keyboard shell for the pinephone is good, but changes the form factor then.

Nokia N900 has a pinephone port

I want my Blackberry back badly, and this project is giving me hope.

The case it a bit too big, there are still battery issues, and of course a 5G card + microphone + loudspeaker need to be added.

But perhaps the day will come that I can roll that wheel to view my emails again, use that excellent small keyboard to reply without having to touch glass.

With some customization, Fairberry can fit a Blackberry keyboard on mobile phones with a USB port, https://liliputing.com/fairberry-lets-you-attach-a-blackberr...

I’m right there with you. The side scroll wheel on my 7520 was perfection. I could operate it from my pocket completely blindly.

Punkt showed off a device that had me hopeful for awhile but it doesn’t look like they are releasing it.

I bought the Bluetooth keyboard from this maker, ZitaoTech. The fit and finish was excellent. Highly recommended.

So it's a recently made clone of the keyboard, rather than an original one?

The readme is unclear on this subject, they advertise "original keyboard".

To be clear I mean this: https://www.tindie.com/products/zitaotech/blackberry-bb9900-...

It’s an original new old stock BlackBerry keyboard, packaged in a good 3d printed case with Bluetooth, USB and battery charger.

Oh ok! Thanks.

I'd love one of these!

I just built a portable enclosure with a charge controller, USB hub, ethernet and four 18650 batteries. While The Hackberry Pi Zero would've been a lot easier (assuming I'd've just bought one instead of making it myself), the only downside is the battery life. My application is for having a server that travels with me and is on 100% of the time, sometimes running on battery for hours at a time.

This, though, is so much smaller... It's definitely something to consider when they're shipping.

Edit: just read, "Main Processor: Only compaticable with Raspberry pi zero 2w." I wonder why it's not compatible with the original Zero. Is it just that the drivers and preinstalled OS are 64 bit? Even though the 2W is more performant per watt, it still takes more absolute power. Hmmm.

> My application is for having a server that travels with me

You probably have your reasons but I wonder why anyone would need that

I have one, and it’s very, very useful: https://taoofmac.com/space/blog/2023/10/07/1830

Nice! My next tiny machine may be a Radxa Zero 3E. A tiny form factor machine with ethernet is definitely appealing.

My current portable uses a Raspberry Pi Zero (not Zero 2). Lower overall power is much more important than performance, and for my use, 700 MHz single core and 512 megs of memory is more than I need. It has been a good project to learn about power controllers.

Does anyone really NEED anything? That'd be a tangent.

I want a portable server because I want my data to be in my physical possession. Also, I enjoy telling people I'm already doing the thing that they're telling me can't be done.

I'll write it up some time. Perhaps you'll see it here on ycombinator.

Please let me encourage you to write it up! I am in the design stages of a similar project and would love to see what other people are doing.

This is one of the very few Cyberdeck kinda things that looks like it could be actually useful. I love it!

I have a vague idea of what my ideal Cyberdeck would be, no idea if there's anything like this already:

One of those super-wide small screens, 1920x720 or thereabouts, with the screen split into 2 terminals. Since I'm wishing, I'd also like that screen to have a 300 to 600ppi e-ink screen built in to a layer, so that when the colour screen is off, the e-ink is visible.

A PC, x86_64 or arm64, built into the screen, with lots of ports, IO, compatible with Pi hats/shields. For extra coolness, a pluggable system like Framework so if someone wants a real RS232 port, they can get one. With USB-C power so I can use any powerbank or other compatible power supply.

A Keychron lightweight Alice-style keyboard, folding a bonus, QMK mandatory, standard bluetooth and/or USB.

I've been wanting to build my own handheld ever since I picked up a 3d printer so the last few months I've been checking these builds out. The blackberry keyboard is my favorite part of the build, definitely going to do the same for mine. Looks great with the casing.

I am working on the same kind of thing. For me the ideal keybaord/screen combination was the Keyboard Featherwing from Adafruit https://www.adafruit.com/product/4818 . Unfortunately, it is a discontinued product. I managed to snag one of the last ones, but I am reluctant to use something that I cannot get any more of.

FYI, there was a board named Hackberry over 10 years ago not related to the Raspberries. It employed the Allwinner A10 CPU and had WiFi on board, which was not common back in the day. It however lacked any exposed GPIO which made it unsuitable for hardware hacking, but had good audio (much much better than the RPis available back then) and decent overall performance. I still have one somewhere and recall using it both as webradio receiver for music and with SDR dongles using rtl_tcp. Later, smaller and better boards such as the NanoPi M1 turned out more useful for remote SDR applications.

https://linux-sunxi.org/Miniand_Hackberry

Wow this is amazing it’s the best cyber deck I have ever seen or would consider using. I wonder if you could get rid of one battery and shove in a 4g LTE modem connected to a usb port.

If that thing had VGA-in on top of the keyboard and mouse out via USB, it would be a great tool to carry in a data center when you have to physically interact with a machine.

Plenty of commercial stuff that does just that. You can even buy dedicated network testers with this functionality.

[The most useful networking tool I own - AliExpress "CCTV Tester" that does a lot more than test CCTV] Cameron Gray https://www.youtube.com/watch?v=DZQSkFl4yIM

> There is a red switch on the left side to decide if the keyboard controller communicates with the HackberryPi or with other device through the USBC-Port underneath.

OK, having it be able to function as an emergency USB keyboard is pretty cool, though I think I'd prefer emulation of a USB device so I could run a sequence of commands, inject usernames and passwords for logins, etc.

There is also the Tindie Null 2 kit - it's built around Rapsberry Pi Zero 2W. I picked one up several years ago and built a gameboy replacement of sorts. It was a lot of fun. Lots of soldering.

https://www.tindie.com/products/ampersand/null-2-kit/

This form factor is so tempting. I’ve gotten close to pulling the trigger on the minimal phone like 5 times but just don’t know if I can actually reasonably switch from my iPhone and not end up annoyed with the change (https://www.minimalcompany.com/).

But a calm, keyboard oriented device just seems great.

The N900 (or N810) form factor is also great, especially for CLI commands/coding.

There was a team trying to bring it back to life (neo900)

I wish someone would make a 5" to 7" clamshell "laptop" that runs a Linux command line and lasts forever on an internal lithium (or replaceable AA) battery.

I want the retro feel of mini laptops back when GUIs were only on $20k UNIX workstations.

I have a MNT Pocket Reform on order just for this reason. I recently sold a Sony PGH (~2009 model) that still ran modern Debian just fine as I'm expecting to get my order soon. Edit: I also bought a broken HP 95LX so I could replace its innards with a RPi Zero 2w and a screen but I haven't made progress on that yet.

Looks super awesome. I've been slowly working towards building pretty much the same thing, but haven't had enough time to finish. I added myself to the wait list. Intend to purchase 3 if I'm able to. Getting everything into such a nice packet is very cool.

Amazing! How hard will it be to replace the screen to an eInk one similar to the beepberry/beepy? I love everything except the screen, and I assume eInk will be the perfect match considering the terminal and power consumption.