📡 Grantham Link YSF- DMR Connection Guide

For accessing the G0GRC Grantham Link between YSF and DMR networks

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🧭 Overview

The Grantham Link connects:

• DMR Talk Group: TG853
• YSF Reflector: 21982 (G0GRC)

This link allows DMR and Yaesu Fusion (C4FM) users to communicate with each other seamlessly.

⚠️ Note:
Access is currently available only via personal hotspots in the Grantham area, unless you are connected to another DMR repeater carrying TG853.

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🔧 Setup for Yaesu Fusion Radios (C4FM)

Step 1 – Enable YSF Mode in Pi-STAR

1. Log into your Pi-STAR configuration page.
2. Under Modes, turn YSF Mode ON.
3. Click Apply Changes.

💡 Tip:
This saves you from having to manually enter the YSF ID in your radio later.

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Step 2 – Select the Reflector

1. In the YSF Host List, search for: YSF21982 GB G0GRC
2. Set this as your Startup Reflector.
3. Click Apply Changes again to save.

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Step 3 – Connect from Your Yaesu Radio

1. Tune your radio to the hotspot frequency in C4FM mode.
2. Press PTT briefly to confirm the hotspot is responding.
3. Press the Wires-X button.
4. If configured correctly, your radio should connect to G0GRC (YSF21982) automatically.
5. If not, manually select or enter the reflector ID.

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📻 Setup for DMR Radios

Step 1 – Confirm DMR Network

In Pi-STAR, ensure the selected DMR network is: FreeSTAR_UnitedKingdom

Step 2 – Configure Your Radio

1. Set your radio to the hotspot frequency.
2. Select Talk Group 853 (TG853).
3. Press PTT to confirm the hotspot is being accessed.

💡 Tip:
You should see transmission activity on your Pi-STAR dashboard when connected.

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✅ Confirming Your Connection

You can confirm your link status and activity via the YSF Dashboard:

🔗 http://ysf.garc.org.uk/

Check that your callsign appears when you transmit on either DMR TG853 or YSF 21982.

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📘 Summary Table

Platform	Mode / Network	Access Point	Key Setting	Notes
Yaesu Fusion	C4FM / YSF	Pi-STAR Hotspot	YSF21982 GB G0GRC	Turn on YSF Mode
DMR	FreeSTAR_UnitedKingdom	Pi-STAR Hotspot	TG853	Use hotspot or linked repeater
Verification	Web Dashboard	http://ysf.garc.org.uk/	—	Confirms connection

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