First: Happy Birthday! I received the DevTerm after a prolonged wait … but they were more forthright about updates… I use my existing phone account as a wifi hotspot so the phone modem was of no value to me either The expansion port where the phone modem plugs in is not a standard laptop pin out although it does use the connector - so it’s going to be possible to use the DevTerm drawings for the expansion board (2 - more USB ports, and the printer to modify the design to add two more USB ports to a card that is physically the size of the phone modem( which is what I would have preferred over the cell modem.) as to connecting to arduino like peripherals my preference is to build expansion boards on ESP32 form factor then wireless connect to them from the DevTerm or the uConsole so that no modifications are required.
I asked about getting the design files pushed to GitHub. All I wanted was a 3d volume for the enclosure and a dxf for the expansion card area. Alex said that they’d be pushed as soon as the devices shipped. That was a month ago now. Still no design files. So much for open hw.
Have the devices already been produced? If only the 4G module and the U.S. is the problem. could you the users who have ordered them without already be supplied or the users who come from other countries.
However, the equipment has not yet been shipped. In most open HW projects, most of the data is only published after delivery because the device does not end up with aliexpress or similar in advance.
They are holding all shipments until everything clears customs. Someone already asked about that.
I started looking at the stuff they published for DevTerm. I guess since a bunch of the internal cards are the same, you can read between the lines and take a swag at the expansion card’s true dimensions.
It would be much easier/open if they just pushed the actual design files up though.
NIce design! - put what ever you want on the board … I love it!!! does it come in different colors? (snark) who cares !!! great idea!!!
Is there a case that also functions as a toaster? If so would passive cooling be okay??? 
I need to know, my entire company is at a standstill and millions are on the line! I have an entire board of wealthy investors ready to move on whatever the answer to this is…
I always render them purple for OshPark. I never use the midnight mask. It’s to hard for me to see smd components under the scope with it. Purple makes it easier to populate PCBs for me. There’s something about the contrast that works with my old eyes.
Scrapped the protoboard idea after looking at the CPI schematic. I’m thinking Rev B should stick to the basics:
what software did you design the board in? The Devterm board had an IC chip on the board that I think acted as a UART for the two USB ports … I was going to look at the Expansion board for the circuit they used.
PCB in kicad, renderings in freecad, and parts from snapeda. All open src / free.
This was just a quick mock/test to see if you could route everything that’s on the expansion slot. I ordered the CM4 version, which can’t support all of the things listed. I’m trying to get a schematic for the CM4 carrier to see what’s really mapped. Once I get that, I’ll prune, respin, and send it to OshPark.
I could have sworn i had seen the schematic for the CM4 adapter board, but after searching my history turns out i was looking at one from another company. I wonder how similar they are and if this would work in the CPI motherboard
Man, thanks. The CPI SODIMM does appear to share common pins with CM3. This helps a bunch.
Ah, I see what you mean. That GL850G IC on the CPI board is a 4-Port USB 2.0 hub. The CM4 only has 1 USB. They must feed that into the hub, then push two of the feeds out to expansion. I guess the 2 USB Type-A’s can stay then.
Hurray! I await your design with great anticipation and joy! (positives superlatives added - 20 character minimum)
Can I get feedback on some code?
Thats awesome! Are you going to let those be produced? I’m interested to join for a groupbuy. Bare pcb is fine as well.
I second that request, the extra USB A ports would be fantastic to have.
I can push the design files to GitHub when it’s done. OshPark can process the raw KiCad files. You basically upload the file, pay $20 bucks, and get three PCBs in 2 weeks.
All those parts are easy to hand solder. I made a CM4 based quadcopter that had the same USB A and MIPI/FPC connector on it. Reflowing them by hand worked well.