Is there an #openSource #openHardware project for an emergency button that when pressed sends out messages via various channels (e.g. SMS, MQTT, Email, LoRa, etc.)? Sounds like a project for a Lilygo T-Beam. It should just be that: Hit the button, messages get sent to predefined targets.

https://cdn.fosstodon.org/media_attachments/files/110/722/599/306/358/312/original/542405f4f89f51d7.png 

 There is HomeButtons, which is only MQTT, but if you are cool with just one transport, it seems perfect. https://github.com/nplan/HomeButtons