New Tool: RF Link Calculator for Planning Mesh Links

Planning a new Meshtastic link? We’re excited to share a powerful tool that can help you evaluate potential connections before deploying hardware.

What is the RF Link Calculator?

The RF Link Calculator is a web-based tool that helps you analyze potential radio links between two points. It uses real terrain data to show you exactly what’s between your proposed node locations.

Key Features

• Terrain Profile Analysis – See the actual elevation changes between two points, including hills, valleys, and obstacles that could affect your signal.
• Fresnel Zone Clearance – The calculator shows the Fresnel zone (the elliptical area around your signal path that needs to be clear for optimal performance). If terrain intrudes into this zone, you’ll know before you deploy.
• Line-of-Sight Visualization – Instantly see if you have a clear line of sight between locations, or if terrain will block your signal.
• Distance & Bearing – Get accurate measurements for link planning.

How to Use It

1. Visit okmesh.org/link-calculator
2. Enter the coordinates for your two node locations (or click on the map)
3. Set your antenna heights for each end
4. Review the terrain profile and Fresnel zone analysis

Why Fresnel Zones Matter

Even if you have “line of sight” between two points, obstructions near the signal path can cause significant signal loss. The first Fresnel zone is especially important—if more than 40% of it is blocked, you’ll see noticeable degradation in link quality.

This tool helps you identify these issues before you invest time and money in a deployment that might not work as expected.

Perfect for Oklahoma’s Terrain

Oklahoma’s rolling hills and varying terrain make link planning essential. What looks flat on a map might have subtle elevation changes that affect your mesh links. The calculator uses actual elevation data to give you an accurate picture.

Try it out and let us know what you think in the Discord!