Lowtech Graph lists low-tech options for every need of a home. Here you can compare them, find tutorials to build them, and link them together into a circular system. Why low-tech?

Emergency communication (grid/network-outage resilient)

A way to call for help, or to hear what is happening, when the power or the network is down — which is exactly when it matters. The options differ in whether they depend on any infrastructure at all, and in how they are powered when nothing else is.

Solutions

• Battery/solar-backed radio or satellite communicator: A radio or satellite messenger that runs on its own battery, charged by a small solar panel. It does not need the grid or the phone network. The household can s
• Local mesh / long-range radio network (LoRa): Small low-power radios that send short messages between buildings or sensors on the property, without the internet or the phone network. It is not a replacement