How to Set Up One-to-One Radio Mode (Base and Rover)

If you're working in areas without reliable internet coverage — like offshore, deserts, or remote construction sites — using radio mode for GNSS communication is a practical and efficient solution.

In this blog, we'll walk you through how to set up Radio Mode (One-to-One) using a base station (like AP10) and a rover （like AP30 Laser）, with simple step-by-step instructions. We'll also explain key settings like channel selection, protocols, and what the blinking lights mean.

What Is Radio Mode (1-to-1)?

Radio Mode allows two GNSS devices to communicate directly over UHF radio signals, without relying on 4G or other network connections. One device (the base) sends positioning corrections, while the other device (the rover) receives them. This setup is ideal for high-precision tasks in isolated environments.

What You Need

To complete the setup, you'll need:

·1 GNSS device as the Base Station
·1 GNSS device as the Rover
·1 controller with field software (like ApekSurv)
·2 stick antennas
·A stable tripod or pole for mounting the base

Step 1: Set Up the Base Station

Let's begin with the base station.

Tip: Place the base station as high as possible and in an open area, free from large trees, buildings, or other obstructions. This helps improve signal transmission.

Also, don't forget to attach the stick antenna. It's required on both the base and rover to ensure signal reception.

Once the hardware is ready, open the controller and follow these steps:

Base Configuration (Using Controller)

1. Tap Communication
2. Select the Base's Device ID
3. Tap Connect
4. Tap Base
5. Go to the General Parameters page
6. Tap Diff Format and choose RTCM32
7. Tap OK

We'll use Single Point mode in this example (i.e., no external corrections).

8. Go to Datalink
9. Choose Internal Radio
10. Tap the field below to enter Radio Parameters

Set the following:

·Channel: 1–15. (We'll use Channel 1)
·Protocol: Choose LoRa
·Power: Choose High

11. Tap OK
12. Tap Start Base

✅ Done! The base station is now broadcasting signals.
Check the DIFF light — if it's blinking green, the base is working properly and sending correction data.

Step 2: Set Up the Rover

Now that the base station is running, let's configure the rover.

Make sure the stick antenna is attached, then:

1. Tap Communication
2. Tap Stop to disconnect from the base
3. Select the Rover's Device ID
4. Tap Connect
5. Tap Rover
6. Go to Datalink
7. Choose Internal Radio
8. Tap the field below to enter Radio Parameters

Set the same values as the base:

·Channel: must match the base (e.g., Channel 1)
·Protocol: Choose LoRa

9. Tap OK
10. Tap Apply

✅ Check the DIFF light again — if it's blinking green, the rover has received the signal from the base and is working correctly.

That's It!

Your one-to-one radio mode setup is complete! The base is sending correction data, and the rover is receiving it via radio. You're now ready to collect high-accuracy positioning data in offline environments.

Pro Tips:

·Always ensure both devices use the same channel and protocol
·Use high powermode if the operating distance is long or if there are minor obstructions
·Check antenna connections and DIFF light indicators during setup
·Avoid using custom frequencies unless required — stick to predefined channels for simplicity

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