MeshCore

Build an off-grid messaging network you understand and can maintain.

MeshCore lets compatible radios exchange short messages without cellular service or an internet connection. Getting reliable results takes more than buying a pair of devices. You need the right firmware, matching radio settings, useful antenna placement, and a clear understanding of how messages reach their destination.

MeshCore: A Comprehensive Guide to Off-Grid Mesh Communication, Second Edition, Revised for 2027 takes you from your first radio setup to planning, securing, and troubleshooting a practical network.

Inside, you'll learn how to:

• Choose compatible hardware and distinguish phone-connected companions from standalone messengers.
• Install firmware, connect your devices, configure radio settings, and send your first messages.
• Understand direct communication, repeater paths, room servers, and supported off-grid Companion Repeat Mode.
• Set up private channels and understand what encryption does and does not protect.
• Improve coverage through antenna selection, placement, and realistic field testing.
• Explore supported Bluetooth and Wi-Fi connections, Companion CLI, remote administration, and firmware updates.
• Troubleshoot pairing problems, missed messages, GPS issues, and battery drain.
• Plan communication procedures for outdoor activities, neighborhood networks, and emergency preparedness.
• Explore sensor projects, MQTT, Home Assistant, and custom gateways.

This revised edition includes expanded hardware coverage, updated firmware guidance, clearer routing explanations, and practical emergency message templates.

Written for beginners, radio hobbyists, outdoor users, and community network builders, this guide combines accessible explanations with intermediate and advanced topics you can explore as your needs grow.

Start with two radios. Learn their limits. Build coverage you have tested.