Skip to content

3DR Radio 2 Setup Guide

This comprehensive user guide will walk you through setting up, configuring, and using the 3DR Radio 2 (R7002) WiFi HaLow Telemetry Module for your drone or robotic applications.

Quick Start

What You'll Need

  • 1 Access Point (AP) module - Acts as the main coordinator
  • 1 or more Station (STA) modules - Connect to your drone/robot
  • Computer with web browser
  • Ethernet cable (for AP connection)
  • Serial cables for STA connections

Basic Setup Overview

  1. AP Module: Connect via Ethernet to your computer/network
  2. STA Modules: Connect via serial to your drone/robot autopilot
  3. Configure: Use web interface to set up network parameters
  4. Test: Verify communication between all modules

Step-by-Step Setup

Step 1: Physical Connections

Access Point (AP) Setup

  1. Power the AP module using either:

    • USB-C cable connected to computer
    • 5V power via the telemetry port (pins 1 and 6)

  2. Connect Ethernet cable:

    • Connect AP's Ethernet port to your computer's Ethernet port
    • Or connect to your local network switch

  3. Configure your computer's network (Windows):

    • Open Control Panel → Network and Internet → Network and Sharing Center → Change adapter settings
    • Right-click your Ethernet adapter and select Properties
    • Select Internet Protocol Version 4 (TCP/IPv4) and click Properties
    • Set the following values:
      • IP address: 192.168.200.250
      • Subnet mask: 255.255.255.0
      • Default gateway: 192.168.200.1
    • Click OK to save and close all dialogs

  4. Configure your computer's network (Linux):

    • Open a terminal and run ifconfig or ip addr to identify your Ethernet interface name (e.g., enx9cebe8922aa8).

    • Execute the following commands, replacing enx9cebe8922aa8 with your actual interface name:

      sudo ip addr flush dev enx9cebe8922aa8
sudo ip addr add 192.168.200.2/24 dev enx9cebe8922aa8
sudo ip link set enx9cebe8922aa8 up

    • Confirm your network settings with ip addr show enx9cebe8922aa8.

Station (STA) Setup

  1. Power each STA module using:

    • USB-C cable, or
    • 5V power via telemetry port

  2. Connect to your autopilot:

    • Use the 6-pin JST-GH connector, or
    • Connect U1TX and U1RX to your autopilot's telemetry port, and
    • Connect GND and +5V for power

Step 2: Initial Configuration

Access the Web Interface

  1. Open your web browser and navigate to http://192.168.200.1

  2. Login to the interface. If prompted, use default credentials.

  3. Verify the AP is working:

    • Check that the interface loads correctly
    • Note the current firmware version

Configure Network Settings

  1. Navigate to Settings tab

  2. Set basic parameters:

    • Wi-Fi Mode: Access Point (AP)
    • SSID: 3DR_XXXXXX (or your custom name)
    • Security: WPA2 (recommended) or None for testing
    • Bandwidth: 4MHz (only option available)
    • Channel Frequency: 925 MHz (US) or appropriate for your region
    • DHCP Server: Enabled

  3. Save configuration and wait for reboot

Step 3: Connect Station Modules

Automatic Connection

  1. Power on your STA modules
  2. Wait 1-2 minutes for automatic connection
  3. Check AP Stats tab to see connected stations
  4. Note the IP addresses assigned to each STA

AP Stats Dashboard

Manual Configuration (if needed)

  1. Access each STA's web interface at http://192.168.200.x - x is the station's IP last octet.

  2. Configure STA settings:

    • Wi-Fi Mode: Station (STA)
    • SSID: Same as AP (3DR_xxxxxx)
    • Security: Same as AP
    • Channel Frequency: Same as AP

  3. Save and reboot for each STA

Step 4: Verify Communication

Test AP-STA Communication

  1. Check AP Stats tab:
    • All STAs should show as "Connected"
    • Note their IP addresses
    • Check signal strength indicators

Dashboard Interface

  1. Test data flow:
    • Send MAVLink data from your autopilot
    • Verify it appears at the AP
    • Check for any error messages

Test End-to-End Communication

  1. Configure your ground station to connect to the AP
  2. Verify telemetry data flows from drone to ground station
  3. Test command sending from ground station to drone

Advanced Configuration

Network Optimization

  1. Power Settings
  2. TX Power: Adjust based on range requirements
    • Higher power = longer range, more battery usage
    • Lower power = shorter range, less battery usage

  3. Recommended: Start with 20dBm, adjust as needed

  4. Channel Selection

    • US (FCC): 902-928 MHz range
    • Europe: 863-868 MHz range
    • Choose channels with the least interference in your area

Security Configuration

  1. WPA2 Setup

    1. Set a strong password (minimum 8 characters)
    2. Use WPA2-PSK for better security
    3. Avoid WEP (deprecated and insecure)

  2. Network Isolation

    • Enable client isolation if you don't want STAs to communicate with each other
    • Use VLANs for enterprise deployments

Mesh Network Setup

Tree-based Mesh

  1. Update firmware to mesh-capable version

  2. Configure mesh parameters:

    • Mesh ID
    • Parent selection criteria
    • Routing protocols

  3. Deploy modules in tree topology

  4. Test mesh connectivity between all nodes

Firmware Updates

Prerequisites

  • All modules powered on and connected
  • Firmware files for both AP and STA modules
  • Stable network connection

The update procedure is as follows.

Step 1: Update STA Modules First

Important

Always update STAs first, then AP last

  1. For each STA module:

    • Access web interface: http://192.168.200.X
    • Go to Settings > Firmware Update
    • Upload STA firmware file
    • Wait for reboot and reconnection

  2. Verify all STAs reconnect to the AP

Step 2: Update AP Module

  1. Access AP interface: http://192.168.200.1
  2. Go to Settings > Firmware Update
  3. Upload AP firmware file
  4. Wait for AP reboot (network will be temporarily unavailable)

Step 3: Verify Update Success

  1. Check all modules are running new firmware
  2. Test communication between all modules
  3. Verify web interfaces load correctly

Troubleshooting

Common Issues

STA Not Connecting

Symptoms: STA doesn't appear in AP Stats Solutions: - Check power and connections - Verify SSID and security settings match AP - Wait 2-3 minutes for automatic connection - Power cycle the STA module

Poor Signal Strength

Symptoms: Low signal bars, intermittent connection Solutions: - Increase TX power on both AP and STA - Check for physical obstructions - Try different channel frequency - Reposition modules for better line-of-sight

Web Interface Not Loading

Symptoms: Can't access configuration pages Solutions: - Clear browser cache and cookies - Try different browser - Check network connection settings - Verify correct IP address

Firmware Update Fails

Symptoms: Upload fails or module becomes unresponsive Solutions: - Verify correct firmware file for module type - Check file size (should be ~1MB) - Ensure stable network during upload - Power cycle and try again

Recovery Procedures

If AP Becomes Unresponsive

  1. Power cycle the AP module
  2. Wait 3-5 minutes for full reboot
  3. Try accessing http://192.168.200.1 again
  4. Check for error messages in serial output

If STA Won't Reconnect

  1. Power cycle the STA module
  2. Wait 2-3 minutes for reconnection
  3. Check AP Stats to see if it appears
  4. Reconfigure if necessary

If Wrong Firmware Uploaded

  1. Use direct Ethernet connection to access the device
  2. Reconfigure WiFi settings through web interface
  3. Upload correct firmware for the module type

Best Practices

Installation Tips

  • Mount modules away from metal objects and antennas
  • Use quality cables for power and data connections
  • Secure connections to prevent vibration damage
  • Test thoroughly before flight operations

Network Planning

  • Plan your network topology before deployment
  • Consider range requirements vs. power consumption
  • Test in your actual environment before critical operations
  • Have backup modules ready for critical applications

Maintenance

  • Regular firmware updates for security and features
  • Monitor signal strength and connection quality
  • Check for physical damage after rough landings
  • Keep configuration backups for quick recovery

Support and Resources

Documentation

Getting Help

  • Check logs in serial terminal for error messages
  • Verify compatibility of firmware versions
  • Contact support with specific error details
  • Include configuration and environment details

Purchase and Support

QGroundControl how-to

Follow these steps to connect your 3DR Radio 2 WiFi HaLow link to QGroundControl (QGC):

1. Connect the AP Module to Your Host PC

  • Power up the AP (Access Point) module and connect it to your host PC via Ethernet or WiFi.
  • Ensure your PC joins the same IP subnet as the AP (e.g., 192.168.200.250).
  • On Linux, you can verify your connection with ip addr or ifconfig.
  • Confirm you can access the AP's web interface (typically at http://192.168.200.1).

2. Ensure STA Module is Connected to Flight Controller

  • The STA (Station) module should be connected to your flight controller's UART telemetry port.
  • Power up the STA module and ensure it joins the AP network.
  • Open QGroundControl on your host PC.
  • Go to Application Settings (gear icon) → Comm Links.
  • Edit the existing links or add a new link:
    • You can give the link a custom name for easy identification.
    • Disable all other link types (e.g., Serial, TCP, Bluetooth).
    • Enable only UDP.
    • Set the UDP port to 14550 (default for MAVLink).
    • Optionally, select Automatically Connect on Start so QGroundControl connects as soon as it launches.
    • If needed, you can also enable High Latency mode for long-range or low-bandwidth links.
  • Save and connect.

QGroundControl Communication Link Example

4. Verify Connection

  • QGroundControl should automatically detect the MAVLink stream from the flight controller via the HaLow link.
  • You should see vehicle telemetry and status in QGC.

QGroundControl Connected Example

QGroundControl Status Example

Tip

  • No additional drivers are required on Linux; the HaLow AP acts as a transparent network bridge.
  • If you have multiple network interfaces, ensure QGC is listening on the correct one (the subnet of the AP).

Version: 0.1.0 Last Updated: September 2025 Compatible with: 3DR Radio 2 R7002 v2.0 and later