Baofeng Dm1702 Firmware Update Link -

Here’s an interesting, concise write-up on the Baofeng DM-1702 firmware update — aimed at amateur radio enthusiasts and tinkerers.

What You Need

  1. Baofeng DM-1702 with a fully charged battery.
  2. Programming Cable (USB to Kenwood 2-pin). The standard Baofeng cable works.
  3. Windows PC (7, 10, or 11). Most tools do not work reliably on Mac/Linux.
  4. The Firmware File (.sgl or .bin extension). Source: Baofeng tech support, the radio's vendor, or amateur radio forums like HamRadioIndia or groups.io.
  5. Baofeng Firmware Upgrade Tool (usually Baofeng_Update_Tool.exe or BF-170X_Upgrade.exe).
  6. USB Serial Driver (e.g., Silicon Labs CP210x or Prolific PL2303 – whichever your cable uses).

Important Notes

  • No official firmware repository exists from Baofeng. You must obtain the correct .sgl file from your radio's seller or a trusted ham community.
  • Do not use DM-1701 firmware – it will brick the radio.
  • OpenGD77 alternative: The DM-1702 supports the excellent open-source OpenGD77 firmware. If you want advanced features (better UI, satellite support, real DMR), consider flashing OpenGD77 instead of stock firmware. The process is different – check their official guide.

If you don't have a specific bug fix or new feature requirement, do not update the firmware – stock updates rarely add user-visible features, and the risk of bricking is real.

Introduction

The Baofeng DM-1702 is a popular digital mobile radio (DMR) device that offers advanced communication features, including digital and analog modes, GPS, and text messaging. Like any electronic device, its firmware can become outdated, and updating it can improve performance, fix bugs, and add new features. This paper provides an overview of the Baofeng DM-1702 firmware update process, including the benefits, risks, and step-by-step instructions.

Benefits of Firmware Updates

Firmware updates for the Baofeng DM-1702 can bring several benefits, including:

  1. Improved performance: Updates can optimize the device's performance, reducing errors and improving overall functionality.
  2. New features: Firmware updates can add new features, such as support for new protocols, improved user interface, or enhanced security.
  3. Bug fixes: Updates can fix existing bugs and issues, ensuring a more stable and reliable operation.
  4. Security patches: Firmware updates can include security patches, protecting the device from potential vulnerabilities and hacking.

Risks of Firmware Updates

While firmware updates are generally beneficial, there are some risks to consider:

  1. Bricked device: If the update process is not followed correctly, the device may become unusable (bricked).
  2. Data loss: Firmware updates may erase device settings, contacts, or other data.
  3. Incompatibility: Updating to an incompatible firmware version can cause device malfunction or complete failure.

Preparation for Firmware Update

To minimize risks and ensure a successful update: baofeng dm1702 firmware update

  1. Read the manual: Understand the update process and requirements.
  2. Backup device data: Save device settings, contacts, and other important data.
  3. Use a reliable computer: Ensure the computer used for the update is stable and free from malware.
  4. Use the correct update cable: Use the Baofeng-provided cable or a compatible equivalent.

Step-by-Step Firmware Update Instructions

To update the Baofeng DM-1702 firmware:

  1. Visit the Baofeng website: Download the latest firmware version and the update software (e.g., Baofeng CPS).
  2. Install the update software: Install the CPS software on your computer.
  3. Connect the device: Connect the DM-1702 to your computer using the update cable.
  4. Launch the update software: Open the CPS software and select the device model (DM-1702).
  5. Read the device information: The software will read the device's current firmware version and information.
  6. Select the update file: Choose the downloaded firmware file (.bin or .fw format).
  7. Start the update: Click the "Update" or "Write" button to begin the firmware update process.
  8. Wait for completion: The update process may take several minutes; do not interrupt or disconnect the device.
  9. Verify the update: After completion, verify the new firmware version and test the device.

Common Issues and Troubleshooting

Common issues during the update process:

  1. Device not recognized: Ensure the correct cable is used and the device is properly connected.
  2. Update software errors: Try reinstalling the CPS software or using a different computer.
  3. Device not functioning: If the device becomes unresponsive, try resetting it or seeking professional assistance.

Conclusion

Updating the Baofeng DM-1702 firmware can improve performance, add new features, and fix bugs. However, it's essential to follow the correct process, take necessary precautions, and be aware of potential risks. By understanding the benefits and risks, preparing properly, and following the step-by-step instructions, you can successfully update your Baofeng DM-1702 firmware and enjoy improved functionality and performance.

References

  • Baofeng official website: www.baofeng.com
  • Baofeng DM-1702 user manual: [download link]
  • Baofeng CPS software: [download link]

To update the firmware on a Baofeng DM-1702 Go to product viewer dialog for this item.

(also known as the DM-X), you must use specific Customer Programming Software (CPS) and enter a dedicated bootloader mode. 1. Identify Your Radio Version There are two distinct hardware versions of the Here’s an interesting, concise write-up on the Baofeng

that use different software and firmware. Check your current firmware version in the radio's menu before proceeding:

Version 1 (Firmware L05.xx.xxx): Uses software designed for the Retevis RT72.

Version 2 (Firmware v02.xx.xxx): Uses standard MD CPS software. 2. Software Requirements

Official Downloads: Firmware and CPS are typically found on BaofengRadio.com or Baofeng Tech (BTECH).

Programming Cable: You must use the specific cable that came with the radio; standard UV-5R cables are often incompatible. 3. Update Procedure Enter Bootloader Mode: Turn the radio OFF.

Press and hold the '#' button while turning the volume knob ON.

The screen should remain black, but the LED indicator will light up green, indicating it is in firmware update mode. Open Flash Tool: Launch the CPS software on your PC.

Navigate to Program -> Tool to open the firmware upgrade window. Load and Flash:

Click "Load" and select the official .bin or upgrade package file you downloaded. Ensure the correct COM port is selected. What You Need

Click "Upgrade" and wait for the "Download success" message.

Restart: Once complete, turn the radio off and back on to initialize the new firmware.

Warning: Using the wrong version's firmware (e.g., flashing V2 firmware onto a V1 radio) can brick the device.

How to upgrade firmware on DM-1701 radios with different versions?

Step 4: Enter Firmware Update Mode

  • For most DM-1702s: Press and hold the PTT (side big button) + Top Side button (PF1) simultaneously, then briefly press the Power button.
  • Alternative method: Hold PTT + Monitor (the key below PTT) and press Power.
  • Expected result: The screen will stay blank or show "Recovery" / "Download" mode. The upgrade tool should change from "Waiting" to "Connected".

If the tool says "Device not found" after 10 seconds, disconnect, power off, and try the key combination again.

Issue 4: Bricked Radio (No boot, no LED, no screen backlight)

  • Cause: Power loss during firmware write.
  • Fix: This is serious. You will need a USB-to-TTL serial adapter and a ST-Link programmer to directly reprogram the bootloader chip. For most users, contacting Baofeng support or returning the radio is the only solution. This is why charging the battery is critical.

Step 4: First Boot

  1. Turn the radio ON. The OpenGD77 splash screen should appear.
  2. You will likely see "Calibration Data Missing" or scrambled frequencies. (This is because the OpenGD77 firmware stores calibration data differently).
  3. Critical Step: Use the OpenGD77 CPS (not the Baofeng one) to restore your calibration. Go to "Calibration" -> "Load from file" and select the .dat file you backed up earlier. Write this to the radio.
  4. Now, read the radio with OpenGD77 CPS. It will show a blank codeplug. You must rebuild your codeplug from scratch (or import CSV files) because OpenGD77 uses a different data structure than stock firmware.

The Deeper Current: OpenGD77

Why do we do this? Why endure the pain of Baofeng’s stock firmware? Because the DM-1702 is a Trojan horse. The true purpose of updating the firmware is often to replace it entirely with OpenGD77.

The OpenGD77 custom firmware turns the DM-1702 from a toy into a tool. It fixes the audio latency. It adds a real satellite tracker. It gives you a contact list that sorts alphabetically. It enables a "Promiscuous mode" that listens to any DMR transmission, regardless of color code.

Flashing OpenGD77 is the same ritual, but with a different .bin file. The first time you hear the clear, latency-free audio after the update, you feel a jolt of dopamine. You realize you have jailbroken your radio.

Software Checklist

  • DM-1702 Firmware Flasher Tool (Usually DMR_Flash_Tool.exe or the OpenGD77 installer).
  • The Firmware File (Either the official Baofeng .bin file from Baofeng's tech support or the latest OpenGD17_1702.sgl file from the OpenGD77 website).
  • Drivers: You need the correct USB drivers for the radio's bootloader. The STM32 bootloader drivers are required. The easiest way is to install Zadig driver utility.

Common Pitfalls

  • Using a UV-K5 firmware – Not compatible, will brick.
  • USB cable only – Impossible for bootloader stage. Must use ST-Link.
  • Wrong voltage – 5V on SWD kills the CPU.
  • Forgetting to short “Flash” jumper – Some PCBs need a solder bridge.