[farkanoid]

Somewhat related - I've been working on a design using Nordic's NRF52840 SOC for work; Intensely focusing for the past few weeks on antenna tuning for maximum BLE range.

Part of the testing involves using the 'nRF Connect' app, which lists all nearby Bluetooth devices, plots signal strengths, and allows for some rudimentary communication. It doesn't seem to be Nordic-specific.

I'd frequently leave the app open scanning during development late in the evening, and rarely, an unidentified Bluetooth LE device would pop up for a few minutes then disappear.

Turns out it was my dad's pacemaker, which sends telemetry via Bluetooth to a 4G gateway they gave him (this only happens after he lies down with little movement apparently).

This prompted me to look into pacemakers and deactivation after death of course. I wish I hadn't, it turns out they leave it in the corpse unless it's scheduled for cremation.

Because of the aforementioned research, and the open field tests I was performing, it somehow devolved into me having a nightmare where I was RF testing at a graveyard, and the app suddenly displaying a bunch of pacemakers underground.

...I really hope this isn't possible - The signal through 6ft of dirt and concrete would be marginal but still detectable.

[Footprint0521]

Random question, but will this be open sourced at any point? Just asking as a curious party who just bought one for exploration lol

Also super random question but would you happen to have any idea/advice on how to get a Raytac MDBT50Q-CX Nordic nRF52840 Dongle (https://www.amazon.com/gp/product/B0DP6MVDZQ) flashed with ButteRFly (https://github.com/whad-team/butterfly)?

I got it flashed through nrfutil with sniffer and sweyntooth, but butterfly has not been working no matter what I try and do…

Thanks for even taking the time to read this :)

[farkanoid]

Hi, sorry I missed your reply - Unfortunately it's a proprietary design, the vendor provides the firmware, I do all the schematic capture / PCB layout.

Good luck though!