[HN Gopher] Portable drone jammer uses a Raspberry Pi tactical S...
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Portable drone jammer uses a Raspberry Pi tactical Software Defined
Radio
Author : protik49
Score : 41 points
Date : 2025-02-16 19:57 UTC (3 hours ago)
(HTM) web link (www.tomshardware.com)
(TXT) w3m dump (www.tomshardware.com)
| mystraline wrote:
| I tried looking for how they're attacking ELRS (control link),
| and I'm seeing nothing.
|
| There's Joachim's LoRa library. However ELRS uses the 2.4GHz and
| its a blend of LoRa and FHSS. Basically you need a BladeRF or
| better to attack the control link properly.
|
| And given the RPi platform, they're likely using RPITX as the SDR
| transmitter. Lucky to get 1MHz bandwidth... And you need 80MHz
| minimum.
|
| And the RPi doesn't have the horsepower to properly do 20 or more
| LoRa channels, with 112MHz mode on Blade.
|
| Until I see a BoM, code, or demonstration, I'm going to consider
| this to be hogwash.
| jdietrich wrote:
| Anyone who cares about signal integrity is using dual-band, so
| you'd also need to cover the 915MHz/868MHz band. It might be
| possible that there's some kind of hideous vulnerability in
| ELRS, but there's a pretty high-stakes jamming contest going on
| right now.
| therein wrote:
| I do wonder if it is using something like this [0], but then
| there is always PrivacyLRS[1].
|
| [0] https://www.nccgroup.com/us/research-blog/technical-
| advisory...
|
| [1] https://github.com/sensei-hacker/PrivacyLRS
| geerlingguy wrote:
| It looks more like someone built a fun cyberdeck-style build
| with some neat hardware, and have a use case in mind... but
| until I see any code or evidence it does what it says, I'd be a
| little doubtful.
| 05 wrote:
| No way in hell anyone using drones for military purposes is
| even using non-modified ELRS, at the very least the hopping
| sequence is sourced from a CSPRNG and there's packet
| authentication.
| mint2 wrote:
| Wouldn't intentional interference be very illegal to do at
| random? Sure, hard to get caught but isn't it illegal?
| thatguy0900 wrote:
| Jamming is very illegal in the US at least.
| https://www.fcc.gov/general/jammer-enforcement
|
| Now might be the time to do it though, maybe everyone at the
| fcc will be fired before your caught.
| smitelli wrote:
| If you've got bored hams around, they'll catch you.
| reaperman wrote:
| I doubt the FCC will be disbanded in a way that prevents
| any enforcement of anti-jamming rules. But the only thing
| local hamsters would do is report you to the FCC, so if it
| were dissolved as GP posits, it wouldn't matter which hams
| find you.
| Etheryte wrote:
| Drones are used in active warfare as we speak, legality in
| civil use is pretty irrelevant in that context.
| mint2 wrote:
| So you're clarifying that for 0.1% of HN the legality is not
| an issue as if those in war zones were wondering?
| internet101010 wrote:
| I feel like I should have the right to block someone trying to
| use a drone to look inside of my windows.
| brokenmachine wrote:
| Nobody is doing that.
|
| But the legal way to do that is by closing your blinds.
| rukuu001 wrote:
| I know a guy (Australia) who does this regularly. If a drone
| flys over his back yard he activates his jammer and the thing
| makes a controlled vertical descent to his lawn.
|
| 100% of the time its neighbourhood kids trying out their toy,
| and they need to come beg for it back. Then he has the chat
| about privacy etc etc.
|
| The jammer itself came from Alibaba I think.
| jimmySixDOF wrote:
| Unfortunately the probable countermeasure to things like this
| pushing more autonomy to the drone so expect a lot less human in
| the loop control where jamming is a problem i.e active conflict
| zones.
| 05 wrote:
| Fiber optics is already a non-ML solution to jamming (and RF
| based detection).
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(page generated 2025-02-16 23:00 UTC)