User Manual: dikkod Upgraded 4.2 MMDVM DMR Dstar YSF Hotspot

1. Introduction

The dikkod Upgraded 4.2 MMDVM DMR Dstar YSF Hotspot is a digital voice modem designed for amateur radio enthusiasts. This device integrates a Raspberry Pi Zero W with an MMDVM hotspot board, preloaded with the pi-Star 4.2.1 software. It facilitates digital radio communication modes such as DMR, D-Star, and YSF, allowing users to connect to worldwide digital radio networks via a local internet connection. The hotspot features a two-color OLED screen for status display and comes with essential accessories for quick setup.

Figure 1.1: The dikkod MMDVM Hotspot displaying DMR mode and its assigned IP address on the OLED screen.

2. Safety Information

• Power Supply: Use only the specified 5V DC power supply. Ensure the power source is stable and within the recommended voltage range to prevent damage to the device.
• Environment: Operate the hotspot in a dry, well-ventilated area. Avoid exposure to extreme temperatures, direct sunlight, moisture, or dust.
• Handling: Handle the device with care. Avoid dropping or subjecting it to strong impacts. Do not attempt to open the aluminum shell unless instructed for maintenance or component access.
• Antenna: Ensure the 433MHz antenna is securely connected before powering on the device to prevent damage to the radio module.
• Electrical Safety: Do not touch internal components while the device is powered on. Disconnect power before performing any internal adjustments or connections.

3. Package Contents

Verify that all items listed below are present in your package:

• OLED display (pre-installed on board) x1
• Raspberry Pi Zero W x1
• MMDVM hotspot board x1
• 8G TF card (preloaded with pi-Star 4.2.1) x1
• Aluminum Shell x1
• 433Mhz Antenna x1
• USB cable x1
• 90-degree connector x1
• Instructions for use x1 (this manual)

Figure 3.1: Overview of the main components included in the package, showing the assembled board, TF card, antenna, and USB cable.

4. Setup Instructions

Your dikkod MMDVM Hotspot comes largely pre-configured for ease of use. Follow these steps for initial setup:

1. Assemble the Hotspot:
   • Ensure the MMDVM hotspot board is securely connected to the Raspberry Pi Zero W, and the OLED display is attached.
   • Place the assembled board into the aluminum shell.
   • Screw the 433MHz antenna onto the SMA connector on the MMDVM board, ensuring it is finger-tight.
   

   Figure 4.1: Internal view of the MMDVM board connected to the Raspberry Pi Zero W, with the 8GB TF card inserted.
2. Insert TF Card: The 8G TF card with pi-Star 4.2.1 preloaded should already be inserted into the Raspberry Pi Zero W. If not, gently insert it into the microSD card slot.
3. Connect Power: Connect the provided USB cable to the DC5V port on the hotspot and then to a suitable 5V USB power adapter (not included). The device will power on automatically.
4. Initial Boot and Wi-Fi Configuration:
   • Upon first boot, the hotspot will attempt to connect to a temporary Wi-Fi network with SSID: m100 and password: abc12345. You can create a temporary hotspot on your mobile phone with these credentials to get the MMDVM working quickly.
   • Once connected, the OLED screen will display the assigned IP address (e.g., wlan0: 192.168.4.128).
5. Access pi-Star Dashboard:
   • Open a web browser on a device connected to the same network as the hotspot.
   • Enter the IP address displayed on the OLED screen (or http://pi-star) into the browser's address bar.
   • Login using the default credentials: Username: pi-star, Password: raspberry.
   

   Figure 4.2: The Pi-Star Digital Voice Dashboard interface, accessible via web browser for configuration and monitoring.
6. Configure pi-Star Settings:
   • Navigate to the Configuration section.
   • Set your Callsign, DMR ID, Frequency, Color code, and Repeater Slot to match your amateur radio license and network requirements.
   • The device is pre-set to simplex mode, OLED3 type, and STM32 GPIO type. Adjust these only if necessary for your specific setup.
   • Configure your permanent Wi-Fi network settings under the Wireless Configuration section to connect to your home or preferred network.
   • Apply changes and reboot the hotspot as prompted.

5. Operating Instructions

Once configured, the dikkod MMDVM Hotspot operates as a bridge between your digital amateur radio and the internet, allowing access to various digital voice networks.

5.1 Digital Voice Modes

The hotspot supports multiple digital modes:

• DMR (Digital Mobile Radio): For connecting to DMR networks and talkgroups.
• D-Star: For ICOM's D-Star network.
• YSF (Yaesu System Fusion): For Yaesu's C4FM digital mode.
• Other modes like M17, NXDN, P25, FM, and POCSAG may be supported depending on pi-Star configuration and hardware capabilities.

5.2 Monitoring Status

The OLED display provides real-time status information, including:

• Current operating mode (e.g., DMR).
• Slot status (e.g., Slot 2 Listening).
• Wi-Fi network name and IP address.

For detailed activity logs and network status, access the pi-Star Digital Voice Dashboard via your web browser.

5.3 Connecting Your Radio

Ensure your digital radio is configured with the same frequency, color code (for DMR), and other parameters as set in your pi-Star hotspot configuration. Transmit on your radio to initiate communication through the hotspot.

6. Maintenance

• Software Updates: Regularly check for pi-Star software updates via the dashboard to ensure optimal performance and access to new features.
• Cleaning: Use a soft, dry cloth to clean the exterior of the aluminum shell. Do not use liquid cleaners or solvents.
• TF Card Backup: It is recommended to periodically back up your pi-Star configuration and, if possible, create an image of your TF card. This can help in quick recovery in case of data corruption.
• Environmental Control: Keep the hotspot in a cool, dry place to prevent overheating and prolong component life.

7. Troubleshooting

8. Specifications

9. Warranty and Support

9.1 Customer Service

For any questions or technical assistance regarding your dikkod MMDVM Hotspot, please contact our customer service. We aim to reply within 6 hours.

Refer to your purchase platform for specific contact details or seller information.

9.2 Warranty Information

Specific warranty details may vary by region and retailer. Please retain your proof of purchase for warranty claims. The warranty typically covers manufacturing defects under normal use. Damage resulting from misuse, unauthorized modification, or improper power supply is not covered.

Protection plans may be available for extended coverage. Please check with your retailer for options such as 3-Year or 4-Year Protection Plans.