Wiki » History » Revision 4

« Previous | Revision 4/14 (diff) | Next »
mschramm, 11/25/2019 10:53 PM

M.2 (NGFF) WWAN modem USB breakout board

This is a small break-out board for m.2 (NGFF) type cellular / WWAN modems.

It allows you to insert a m.2 modem from any vendor, and it will provide you with:

  • microUSB-B (3.0) socket for connection to a USB Host (like your PC/Laptop or Embedded System)
  • 5V DC input for power supply (USB supply usually insufficient for current peaks of a modem)
  • all unused m.2 pins on a 2.54mm break-out header
  • 2x SIM card slot for a 2FF-sized SIM, USIM or RUIM cards (dual-SIM)
  • socket for the PCIe lane on the m.2 connector; allows you to connect the board to a PCIe bus/port of a computer by means of a PCIe slot adapter (not included)

Particularly the break-out header is useful to get access to various signals exported in a non-standard fashion by some modem models, such as digital audio PCM.

M.2 / NGFF breakout v1, 1st working prototype

Design Files, Schematics, Component Placement

The design files can be found in the ngff-breakout directory of the osmo-small-hardware git repository. See

Where to buy

The general idea of Open Hardware projects is that anyone is allowed to build the design. So feel free to take the design files and build it yourself, either modified or unmodified. Please make sure you always
  • attribute the original author (Attribution)
  • release any changes to the design files under the same terms (Share Alike)

If you would like to buy a fully-assembled version of this board, you will be able to order it (once we have validated the design) from the sysmocom webshop

Files (9)
osmo-ngff-breakout-pcb_preview.pdf View osmo-ngff-breakout-pcb_preview.pdf 423 KB PCB preview of osmocom ngff breakout board laforge, 08/31/2019 05:08 PM
ngff-bo_v1-proto.jpg View ngff-bo_v1-proto.jpg 151 KB M.2 / NGFF breakout v1, 1st working prototype mschramm, 09/19/2019 06:46 PM
ngff-bo_v2-proto.jpg View ngff-bo_v2-proto.jpg 147 KB M.2 / NGFF breakout v2, 1st working prototype mschramm, 11/25/2019 10:54 PM
ngff-bo_v2-1st-production-run_mr.jpg View ngff-bo_v2-1st-production-run_mr.jpg 153 KB M.2 / NGFF breakout v2, 1st production run mschramm, 12/06/2019 06:09 PM
ngff-breakout-brd.png View ngff-breakout-brd.png 857 KB schematics laforge, 12/07/2019 09:36 PM
ngff-bo_v2-proto-top_mr.jpg View ngff-bo_v2-proto-top_mr.jpg 182 KB M.2 / NGFF breakout v2, 1st prod run, top view mschramm, 12/20/2019 12:50 AM
ngff-bo_v3.jpg View ngff-bo_v3.jpg 1.21 MB v3 pcba laforge, 03/23/2021 06:58 PM
ngff-bo_v3_schem.png View ngff-bo_v3_schem.png 246 KB v3 schematics laforge, 03/23/2021 06:59 PM
NGFF-bo_v3-4-mMod.jpg View NGFF-bo_v3-4-mMod.jpg 142 KB v3 mit modem mschramm, 03/23/2021 09:26 PM

Updated by mschramm over 4 years ago · 4 revisions

Add picture from clipboard (Maximum size: 48.8 MB)