Text when the internet is down.

A local messaging network for Chicago built on long-range radio — no internet, no cell towers, no monthly bill.

Why this exists

When the grid goes down, you're not alone.

Power outages. Storms. Overcrowded events where cell service grinds to a halt. Or you're camping outside coverage and want to stay connected to your group.

Chicago Offline is a messaging network built on MeshCore and LoRa radio. Small devices talk to each other over long-range radio waves — up to several miles — forming a mesh that works when nothing else does.

How it works

Three steps. No tech degree required.

Get a LoRa radio device

Small, affordable hardware. About $35.

Flash MeshCore firmware

One-click setup. Connects to the mesh automatically.

Start messaging

Pair with the app. No account needed.

Live network

The network is live right now.

Real MeshCore devices across Chicago, relaying messages over LoRa radio every day. This isn't a concept — it's running.

— active devices

— messages today

— coverage area

Network Scope Live packet analyzer and node map Live Map Real-time node map with routes and weather Health Check Test which devices hear your signal Key Generator Create a custom device identity

Who it's for

You don't have to be technical.

Curious people You saw this and thought "wait, that's a thing?" It is.

Outdoors / camping Stay connected with your group, miles from cell service.

Neighborhoods A block-level network that doesn't need Comcast.

Emergency prep When the grid fails, radio still works.

Event crews Coordinate at festivals, races, or markets without fighting for bandwidth.

Radio & MeshCore enthusiasts LoRa mesh networking. A new reason to build and experiment.

Get started

Up and running in minutes.

1 Buy a device → Small, affordable radio hardware.
2 Set it up → Quick start guide. Takes five minutes.
3 You're on the network. Start messaging.

No subscription. No account. The device is yours.

Chicago already has a network that works without the internet.

Join the Network