Baofeng Dm1702 Firmware: Update

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

Issue 2: Flashing Stops at 50% (Verification Failed)

• Cause: Poor USB cable or voltage drop.
• Fix: Use a thicker, shorter programming cable. Disable USB selective suspend in Windows Power Options. Try a different USB port.

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.

Building an OpenGD77 Codeplug

OpenGD77 uses a "Contacts" and "Zones" system that is much more logical than Baofeng’s. You cannot copy-paste your old codeplug.

• Download a template: Many ham radio clubs provide DM-1702 OpenGD77 codeplugs for their region.
• Manual entry: Use the OpenGD77 CPS to enter your DMR ID, local repeaters, and talkgroups.
• Hotspot users: OpenGD77 has native support for MMDVM hotspots. You can set your radio to "Hotspot Mode" in the channel settings, which optimizes timing for pi-star.

2. The "Version" Trap (Crucial Step)

Before downloading any files, you must check your radio's current hardware version. Installing the wrong firmware for your hardware version is the most common way to brick a Baofeng.

1. Turn on the radio.
2. Press the Menu button.
3. Navigate to Settings -> Version.
4. Note the version number displayed (e.g., V1.02, V2.01).

The Rule:

• If your radio says V1.x, you must find firmware specifically for the V1 hardware.
• If your radio says V2.x, you must use V2 firmware.
• Cross-compatibility does not exist. Putting V2 firmware on a V1 radio will cause the screen to stay black and the radio will not function.

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.

Updating the firmware on a Baofeng DM-1702 (also known as the

) requires specific tools and steps depending on your hardware version. 1. Identify Your Firmware Version

Before downloading software, check your current firmware. The DM-1702 has two distinct versions with incompatible software: Version 1: Firmware typically looks like L05.01.005 . This version generally uses RT72 programming software Version 2: Firmware typically looks like v02.02.014 . This version uses MD CPS software (e.g., v1.00.66 or v1.00.78). Two Way Radio Forum 2. Required Tools Dmr1702 firmware update fail - Two Way Radio Forum

Updating the firmware on a Baofeng DM-1702 (also known as the DM-X) requires entering a specific update mode and using the Customer Programming Software (CPS). Preparation & Hardware

: You can use a standard micro-USB cable or the specialized Baofeng programming cable. : Install the DM-1702 CPS. Note that some users find the Retevis RT72 programming software more stable as the hardware is nearly identical. www.ylab.ca Update Procedure Enter Firmware Update Mode Turn the radio Press and hold the

While holding the key, turn the volume knob to power the radio

The screen should remain black, but the status light will typically show a solid green or a flashing red/green pattern. Open Upgrade Tool : Launch the CPS software and navigate to Program -> Tool to open the firmware upgrade window. Load Firmware

in the tool window and select your downloaded firmware file (e.g., version 2.2.22 or 2.2.23). Flash the Device Critical Note : A window may pop up that appears to do nothing. You must click "OK" on this prompt to actually start the data transfer.

: Once the progress bar finishes and shows "Success," restart the radio normally. Two Way Radio Forum Troubleshooting Common Issues "No Printer Attached" Error

: When connected, Windows may identify the radio as "No Printer Attached" in Device Manager. This is

for this model's chipset and does not mean the connection failed. Read/Write Failures : If the software fails to read the radio, try the Retevis RT72 CPS Version Mismatch hardware typically uses firmware starting with L05.01.xxx hardware typically uses firmware starting with v02.02.xxx Two Way Radio Forum or help identifying your specific hardware version Baofeng DM 1702 Programming - Page 2 baofeng dm1702 firmware update

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:

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]

Updating the firmware on your Baofeng DM-1702 (also known as the DM-X) is essential for fixing bugs, improving Tier II DMR stability, and unlocking features like Talker Alias. This process requires specific software and a precise boot sequence to ensure the device is recognized by your PC. Pre-Update Checklist Before starting, ensure you have the following:

A Compatible Programming Cable: The DM-1702 can often be programmed using a standard Micro USB cable, though some versions may still require the specialized 2-pin Baofeng programming cable.

The Correct CPS Version: Firmware compatibility is split between two main versions. Check your current firmware in the radio menu first:

Version 1 (Firmware L05.xx): Typically requires the RT72 CPS software.

Version 2 (Firmware v02.xx): Uses the standard MD CPS software.

Windows OS: Most Baofeng software is designed for Windows; if you encounter issues, try running the software in Compatibility Mode for Windows 8. Step-by-Step Firmware Update Guide

Follow these steps to safely flash your device using the official Baofeng DM-1702 Programming Software: Baofeng Download Area

Updating the Baofeng DM-1702 (also known as the ) firmware depends on which hardware version you own, as the two versions use entirely different internal programming. Two Way Radio Forum 1. Identify Your Version

Check your current firmware version in the radio's menu settings to determine which software you need: : Firmware starting with (e.g., L05.01.005). This version typically requires RT72 programming software : Firmware starting with (e.g., v02.02.014). This version uses the MD CPS (Customer Programming Software) Two Way Radio Forum 2. Official Update Method

The standard process involves using a PC and a micro-USB cable (the DM-1702 generally does not require a specialized chipped cable for basic firmware tasks). Two Way Radio Forum Download Software : Official files can be found on the Baofeng download page Baofeng Tech Enter Update (DFU) Mode Connect the radio to your PC. Press and hold the '#' button while turning the volume knob to power on the device.

The screen should remain black, but a green light may turn on, indicating it is in firmware update mode. Flash Firmware Open the firmware upgrade tool within your CPS software ( Program -> Tool Load the firmware package ( and wait for the "success" message before rebooting. 3. Custom Firmware (OpenGD77) Unlike the popular DM-1701 or DM-1801, the DM-1702 is currently NOT supported

custom firmware project. Attempting to flash OpenGD77 firmware onto a DM-1702 may brick the device. Quick Troubleshooting Baofeng DM 1702 Programming - Page 2 - Two Way Radio Forum 28 Dec 2020 —

Updating the firmware on your Baofeng DM-1702 Go to product viewer dialog for this item.

(Tier II DMR) is essential for fixing bugs, improving GPS stability, and ensuring compatibility with the latest digital radio features. Preparation & Requirements Before starting, ensure you have the following:

Hardware: A dedicated Baofeng USB programming cable (ensure the drivers are installed on your PC). Here’s an interesting, concise write-up on the Baofeng

Battery: Ensure the radio is fully charged to prevent a power-off during the write process, which can brick the device.

Software: Download the official DM-1702 Firmware Upgrade Tool and the specific firmware .bin or .s19 file from a trusted source like Baofeng's official site or Radioddity. Step-by-Step Update Process 1. Enter DFU (Download) Mode

The radio must be in a specific bootloader state to accept new firmware: Turn the radio OFF.

Press and hold the Side Button 1 (typically the button above the PTT) and the PTT button simultaneously. While holding these buttons, turn the radio ON.

The LED indicator should flash (often green/red) or remain steady, indicating it is in firmware update mode. The screen will typically remain blank. 2. Connect to PC

Plug the programming cable into the radio’s side port and the other end into your PC’s USB port.

Open Device Manager on your PC to verify which COM Port has been assigned to the cable (e.g., COM3). 3. Run the Upgrade Tool Launch the DM-1702 Upgrade Software. Select the correct COM Port from the dropdown menu.

Click Open or Browse to locate and select the firmware file you downloaded.

Click Download or Update. A progress bar will indicate the status. Do not disconnect the cable or turn off the radio during this time. 4. Finalize and Reset

Once the software displays "Success" or "Update Complete," the radio may reboot automatically. If it doesn't, turn it off and unplug the cable.

Factory Reset (Optional but Recommended): It is often best practice to perform a reset after a major firmware jump to prevent database conflicts.

Check the "About" or "Version" menu in the radio settings to confirm the new firmware version is active. Troubleshooting Tips

Connection Failed: Check that the programming cable is pushed firmly into the radio; these dual-pin connectors often require a very tight fit.

Driver Issues: If the COM port doesn't appear, reinstall the Prolific or CH340 USB-to-Serial drivers.

DMR ID: Firmware updates usually don't erase your codeplug, but it is wise to back up your codeplug using the standard programming software before you begin. Issue 2: Flashing Stops at 50% (Verification Failed)

The Catch: Bootloader First

Unlike a Baofeng UV-5R, you cannot just load firmware over USB. The DM-1702 needs its bootloader updated before any custom firmware will stick.

• Stock bootloader (version < V2.0) rejects unsigned firmware.
• OpenGD79 bootloader (patched) must be flashed via a ST-Link V2 programmer (3.3V) connected to internal pads.