Hey! On the SoM module there are 4 pads for the JTAG. On the eval board, there are 4 pogo pins that are meant for connection to these pads. I can't find pogo pins that are small enough to work. It would appear that all of mil-max's pins have too large of a footprint to fit on the PCB in the required 2.5mm grid.
Thanks!
I used this one on a board:
Maximum Working Height 0.125" (3.18mm)
Recommended Working Height 0.098" (2.50mm)
Minimum Working Height 0.070" (1.78mm)
Mill-Max Manufacturing Corp. 0926-1-15-20-75-14-11-0
CONTACT SPRING LOADED T/H GOLD $0.71
https://www.digikey.com/products/en?keywords=ED1652-ND
A little bit more research I found one that's a bit smaller:
Initially I was a bit worried because of how close the pads are together, but it should be fine. Thanks!
Mill Max 0926-1-15-20-75-14-11-0, which is too tall (see image), and puts extra pressure on the b-som. Any idea what the other pins are?
Edit. Just realized these are through hole components
Are there specific reasons you want the SWD/JTAG pogo pins on your base board?
Reasons to add them:
Reasons to not add them:
As source-level debugging is often not necessary in production, one option is to develop your software initially using the M.2 eval board, so you can take advantage of the 10-pin debugging connector rather than putting SWD debugging on your board.
The 10-pin debugging connector also adds to the cost, however one good alternative is to use Tag-Connect so you only need a series of holes on your board instead of a connector.
If you do omit SWD from your base board, we do recommend you include USB, status LED, reset, and mode buttons.
Thank you for the insight Rick.
I have the Pogo pins on this version of the board for debugging, and a lot of uploading during testing. Good to know the M-SoM does not use the JTag.
These pins are slightly different but are compatible with the Eval Board.
575-0900015207614110
I do have the USB, status LED, reset, and mode buttons. 
