Badge Info

This Year We Are Using Commercially Off The Shelf Hardware & Open Source Software

3D Printed Case + Other Customizations To Create An Off Grid Local Mesh Network

You will need to buy the parts:

There Are The Suggested Online Stores You Can Buy Your Parts From.

We are just under 60 days from DEFCON 31, These Go In and Out Of Stock Often, so you still have time.



  • Lithium Rechargeable Battery at 3.7V with Micro JST 1.25 Plug
  • MakerFocus 4pcs 3.7V 3000mAh Lithium Rechargeable Battery
  • MakerFocus 4pcs 3.7V 1100mAh Lithium Rechargeable Battery
  • 3.7V Lithium Rechargeable 1S 1C LiPo Battery with Micro JST 1.25 Plug (LILYGOĀ® TTGO LoRa32 Compatible)


  •  Open Sourcing The Design To Print
  •  You can mod/customize it!
  • Link To Our Github, Thingiverse & Printables

We Are Posting Videos Daily This Week On Our Youtube

  • Flash The Software
  • 3D Print Your Case
  • How To Build Your Badge
  • How To Set Up Messaging
  • Etc

To help fund the projects We work on, the links are Amazon and Rokland Affiliate links. This will let those folks know that we sent you, and give us a small kickback if you buy that product. 

Which will help us, Continue The Mission.

If you would like to donate please use this link To Donate to OSSEM HOLON A 501(c)(3) nonprofit

Categories: DEF CON 31


9night · June 14, 2023 at 6:04 am

what should be expect in this year’s design do you guys made any prototype for it or is it still in concept stage?

    gaterbyte · June 14, 2023 at 6:07 am

    This Years Badge Made From Off The Shelf Mainboard,
    We have custom made a case that we are releasing this week,
    and showing you how to set it up this week.

d4e5 aka d5even · June 15, 2023 at 3:56 pm

Here is a good place to start to learn the tech, I built an emergency Mesh network for CERT related activities based on that, I suspect there will be similarities:

DmR · July 30, 2023 at 2:10 pm

So? Gater? I’ve got the thing assembled and flashed with the latest Meshtastic version.

When can we expect the rest of the videos or some kind of instructions for the next steps?

Later today I’m gonna try to download the Android Meshtastic app and play with it, but we’ll need some more info on how to set it up and the the badges all talking to each other at DC31.


DmR · July 31, 2023 at 11:14 am


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