digitalRights4All

Yes, someone from the Linux community asked something similar. Not to steal their comment but they suggested the use of this board to pair with the CM5 https://www.pi-shop.ch/nano-base-board-a-for-raspberry-pi-compute-module-5 In terms of space saving, that would be a big help. But I do like the pi5 for the micro hdmi plugs, it allows the device to be used as both a "phone" and a desktop. So I've gotta think about it some more. Thanks for the suggestion!

See that comment here: https://lemmy.zip/post/53113975/22778634

That was actually one of the things I was interested in as well. The pi 5 comes with two micro hdmi ports, which allows the device to be plugged into a monitor and used "as a desktop". You can even have the device propped up next to the monitor for a dual monitor experience. Some people already use a pi 5 for web browsing or document editing. I can easily imagine people using a single device for both personal home PC use as well as on the go computing and calling, and only having a dedicated device at home for heavy gaming or potentially home server use.

50mmx130mmx82mm I measured it in freeCAD, so it might be a few millimeters off the real thing

Sorta copying my comment from another response, but it may answer your question as well: Right now I’m using this “Gravity: CAT1 A7670G Global 4G IoT Communication Module”, connected through USB-C https://www.dfrobot.com/product-2802.html I am able to text reliably using a chat software (it came preinstalled with gnome or KDE, not sure which), and connect to mobile data unreliably using ModemManager and mmcli. I haven’t been able to make a call yet, but I think this is due to a software issue, I’m still trying to get everything working reliably. Once I figure out how to do all of these things reliably, I will add it to the guide in the repo https://codeberg.org/muhammadmanwar/cheaphone

Right now I'm using this "Gravity: CAT1 A7670G Global 4G IoT Communication Module", connected through USB-C https://www.dfrobot.com/product-2802.html I am able to text reliably using a chat software, and connect to mobile data unreliably using ModemManager and mmcli. I haven't been able to make a call yet, but I think this is due to a software issue, I'm still trying to get everything working reliably. Once I figure out how to do all of these things, I will add it to the guide in the repo https://codeberg.org/muhammadmanwar/cheaphone

I'm not sure how to add more images to the post, sorry. But I uploaded images to a repo, in the pictures directory. There are also step by step instructions to make one yourself! https://github.com/muhammadmanwar/cheaphone OR https://codeberg.org/muhammadmanwar/cheaphone

This is very much in line with what I was thinking, but I have not had the time to test the theory yet. I've also considered potentially adding some sort of clock limited state using a GPIO connected switch, but that definitely sounds harder.

Wow! That does seem really similar to what I'm doing. And they seem further along than I am. I'll have to look into this project some more. Thank you!

This is a very helpful suggestion, thank you! I have been having some issues figuring out spacing, the battery sticks out like a sore thumb right now, so if this can save me some space I may end up moving in this direction for further prototyping. Thanks!

Thanks for the suggestion, I mirrored the repo here: https://codeberg.org/muhammadmanwar/cheaphone

I may end up switching entirely to code berg, but I'll see how bothersome it is to push changes to both before I fully migrate. Thanks again!

Correct, and right now the pi doesn't actually get any info about the battery. The battery I'm using has an integrated protection circuit and controlled output, so all of the battery management is currently externally handled. Ideally this will change soon, but there are lots of other things that need to change with the battery. It's not possible to charge the device and have it powered on at the same time, because the battery uses a single USB C connector for both power input and output. And the form factor of the battery is cylindrical, which is also not ideal. Its very much a proof of concept at the moment, I've got plans and ideas, but so far, its basically just a pi 5 with a touch screen, plugged into a power bank, with a fancy case

That's actually the vision I have as well for the device, its basically just a Linux Desktop that fits in an average (cargo pants) pocket, and can do anything a PC can, so in my eyes it is functionally a cyberdeck. The biggest issues with the current configuration are that the UI is a bit tough to use, given the slightly smaller screen size than an average phone, and that it only gets about 7.5 hours of battery life when idling. I've already successfully made VOIP calls from the device, though it doesn't have built in speakers or mics, so you have to use bluetooth or a USB to 3.5 mm adapter.