[swirepe]

Okay, we'll need an rtl-sdr, a raspberry pi, a battery, a keypad, and a screen. We can 3d print a case, or put it in a project box. Both can be ruggedized later.

I found this for the keypad and screen: https://wiki.dfrobot.com/I_O_Expansion_HAT_for_Pi_zero_V1_0_...

There are separate options for keypad and screen, e.g eink and a number pad, but for a first pass this might be enough.

An rtl-sdr won't plug directly into a pi zero w, so we'll need an internal adapter. I know that HATs stack, so if there isn't a hard requirement for an rtl-sdr, we could find an sdr hat to put between the pi and the keypad.

[numpad0]

Making the case is the “rest of the fucking owl”, like there hadn’t been a successful attempt at making silicone membrane keypads found on cheapest TV remotes in homebrew hardware scene.

[swirepe]

There are some other outdoor keypad options - tv remotes, security gates, garage door openers, etc.

The case doesn't need to be special for a first pass. We just need enough of a fucking owl to decide what to do next.

https://i.imgur.com/KmaZLNy.jpg

Edit: my plan was to find a configuration of hardware that does what we want to do first. Next would be trying the new platform from a desk and, if that goes well, designing a case for the parts we selected. You can't really make a custom case without knowing what's going inside :)

[Mister_X]

Great idea about the eink display, any way to save battery power is good, plus, the readability of the eink displays is fantastic. Gotta have a robust water resistant keyboard though.

[tyler109]

Maybe this helps https://www.reddit.com/r/eink/comments/ljq262/epdiy_eink_pc_...