When the internet goes down, the mesh stays up.

MeshCore creates its own small radio network. Your phone is mainly the screen and keyboard: it gives the message to a nearby companion radio using Bluetooth or USB. That radio then sends the message through the air using LoRa radio, not through a mobile tower.

If another radio is too far away to hear you directly, one or more repeaters may pass the message along. This is why it is called a mesh. The local radio path can keep working even when the normal internet path into the valley has failed.

Some extra services are different. A public web dashboard, a newly issued weather warning or information collected from an online source still needs an internet connection somewhere in the system. Losing that connection does not switch off the radio mesh; it only means new online information may not arrive until a connection returns.

The radio signal does not need the electricity grid, but every physical device still needs energy. Your phone needs charge, your companion radio needs charge, and any repeater carrying the message needs a working battery, solar supply or other backup power.

A blackout may therefore shrink the network rather than stop everything at once. Battery-backed sites can remain available while unprotected or damaged sites disappear from the route. Messages may find another working path, but that depends on which radios can still hear one another.

Backup runtime is not unlimited. Long outages, storm damage, poor solar conditions and heavy use can eventually flatten batteries. The dashboard helps people understand which monitored sites are operating and what their reported power condition is, but it cannot make a failed site work.

MeshCore may be useful when neighbours want to share a brief check-in, report a local problem or pass along a clearly sourced public update. That can be valuable during a communications outage, but it does not turn volunteers or radio owners into emergency operators.

There is no guaranteed delivery time, no guaranteed coverage and no promise that somebody is watching every channel. A message may be delayed, missed, misunderstood or based on old information. For that reason, the mesh must never be treated as a replacement for Triple Zero, emergency services or official warnings.

If you receive urgent information through MeshCore, check it against an official source whenever that is possible. If there is immediate danger, act on the instructions of emergency authorities rather than waiting for confirmation from the community network.