What is MeshCore?
MeshCore is an open-source system (often firmware + software) that lets devices communicate without the internet or a cellular network.
It primarily uses LoRa radio hardware (long range + low power).
Key features:
You don’t need a central server or network provider — it’s decentralized.
Devices (nodes) send messages and can also help relay messages for others (multi-hop).
Aimed at scenarios like off-grid communication, emergencies, and outdoor activities.
How does it work?
Here’s a simple step-by-step intro:
Hardware
You need devices with LoRa radios that are compatible with MeshCore.
Choose a firmware variant: for example, a “Companion” (for chatting) and/or a “Repeater” (to forward messages).
Setting up the network
One device broadcasts a message.
Another device can receive that message and forward it (“hop”) to devices farther away that couldn’t catch the original signal directly.
Because multiple devices help each other, this increases range and makes the network more resilient.
Communication & encryption
Messages are encrypted, so they aren’t readable by just anyone.
There’s no central infrastructure; if one node fails, others can still route around it — the network “self-heals.”
Usage
You can send text messages via your device (companion).
Why would you use it?
In areas without mobile internet or phone service (e.g., remote locations, during disasters).
For outdoor activities like hiking and camping, when you still want to stay in touch.
For hobbyists interested in mesh networks and radio communications.
For anyone tired of Big Tech who wants to chat quietly outside the internet, without “eavesdroppers” or censorship.
For people who want to set up an off-grid private chat group.
Limitations to know
It’s best for small messages (text, small data points) — not for large data streams or video.
LoRa is slow compared to Wi-Fi or mobile internet — so speed and bandwidth are limited (nice and quiet, though).
You’ll need some technical know-how to choose hardware, flash firmware, and configure the network… BUT…