What is CIMN

The Central Indiana Mesh Network (CIMN) is a grassroots community group focused on building a resilient, decentralized communications option for our region using the open-source mesh platform MeshCore. By deploying low-power LoRa nodes across Central Indiana, we can enable off-grid messaging that keeps working even when cellular service, internet access, or grid power are unavailable.

CIMN is volunteer-driven and community-powered: we share knowledge, help newcomers get set up, and encourage strategic node placement to strengthen local coverage for emergencies, events, and everyday experimentation. Our goal is simple—make mesh communications approachable and useful, one node at a time.

Getting Started with CIMN

4 quick steps
  • 1
    Get a node.
    Start with a MeshCore-compatible LoRa device. These can be purchased from Amazon for anywhere from $50 - $120, depending on what you want. We recommend a device from Atlavox for a more premium experience.
  • 2
    Flash the firmware.
    Visit the MeshCore website to flash your device with the latest firmware. This is a simple process that takes just a few minutes and ensures your node is running the latest software for optimal performance and compatibility with the CIMN network. There are two choices to pick from in MeshCore: Companion or Repeater. Companion is the default and is the best choice for most users with a handheld device. Repeater is for high level stationary nodes that will be used to extend the mesh network.
  • 3
    Install the app.
    Pair your node with the MeshCore mobile app to configure settings and send messages.
    Download on the App Store Get it on Google Play
  • 4
    Join the mesh.
    Power on your node, verify your region settings, and start sending test messages. In central Indiana, we use the default USA MeshCore settings, this will make sense once you get going!

What Can It Do?

  • Broadcast Messages: Send public messages that anyone on the primary channel can see—great for alerts and announcements.
  • Group Channels: Share encrypted messages with a specific group using a shared channel key (neighborhood watch, event team, etc.).
  • Direct Messaging: Send encrypted one-to-one messages—like secure texting, but off-grid.
  • Location Sharing: Optionally share your location so friends can see you on the map.
  • Telemetry & Sensors: Nodes can report power levels, signal metrics, and sensor data (like weather) when equipped.

See You Around Town On The Mesh Network!

Whether you’re experimenting with a handheld node, building a home base, or helping extend coverage across the region—welcome to CIMN. We’re building something practical, fun, and resilient together.

Need help picking your first node or getting set up? Know of a premium spot in Indiana to put a repeater? Email us at info@cimesh.net and we will be glad to help you get started. We offer free repeater hardware to prime locations that will help expand the mesh network in Indiana.

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