Comment by daveguy
Excellent! Good to know it uses the standard BLE advertisement for the SOS and doesn't need WiFi or GPS.
Well thought out. Excellent work. Thank you for making this available as open source!
Side note -- I wonder if it's possible to have a companion system to scan regularly for the signal at home for the elderly. Then notify caregivers from the companion using available wifi/cell if the SOS is detected. Since it's so well behaved it seems like even having a regular wellness check mode would be possible. Having a companion system for relay would allow the app itself to never need WiFi/cell and have independent care notifications protocols that wouldn't need to be maintained in the app.
Thanks a lot for the kind words!
That's a really cool idea. Kudos!! A companion system should be relatively easy. It's also two single devices communicating with each other which makes things much simpler to build as well. This is worth looking closer into.