Baofeng Dm1702 Firmware Update - New!
Updating the Baofeng DM-1702 firmware requires specific, version-matched CPS software from the manufacturer and a direct USB connection to the radio while in DFU mode, which is activated by holding the # key during power-on. Mismatching firmware versions can render the radio inoperable, with alternative flashing tools available for users via GitHub. For more details on the tools, visit GitHub. DM-1702 bricked after firmware update - Two Way Radio Forum
Updating the firmware on your Baofeng DM-1702 Go to product viewer dialog for this item. (also sold as the Baofeng DM-X
) is essential for fixing software bugs, improving DMR performance, and ensuring compatibility with the latest programming software. Essential Preparation Before starting, ensure you have the following: The Right Cable: The
typically uses a standard micro-USB cable for data transfer, but some versions may require a dedicated Baofeng programming cable. baofeng dm1702 firmware update
Version Identification: There are two main hardware versions. Version 1 often uses firmware like L05.01.004, while Version 2 uses v02.02.014 or higher. Installing the wrong version can brick your device.
CPS Software: You will need the Customer Programming Software (CPS). Versions vary; for instance, older Version 1 devices may need the Retevis RT72 software, while newer Version 2 models use the standard MD-1702 CPS. Step-by-Step Firmware Update Guide
Here’s an interesting, concise write-up on the Baofeng DM-1702 firmware update — aimed at amateur radio enthusiasts and tinkerers. Pros: Retains the original look and feel; very
2. Official Baofeng / OEM Updates
You can find updated versions of the stock firmware from various retailers or Baofeng directly.
- Pros: Retains the original look and feel; very easy to install using the standard CPS (Customer Programming Software).
- Cons: Features remain limited compared to OpenGD77; updates are infrequent.
Baofeng DM-1702 Firmware Update Guide
Identifying Your Baofeng DM1702 Hardware Revision
Crucial Warning: Before attempting any firmware update, you must identify your radio’s hardware version. There are two primary variants of the DM1702:
- Version 1 (Early model): Uses a different CPU and memory mapping. Flashing Version 2 firmware onto a Version 1 radio will brick it.
- Version 2 (Current model): Features the "STM32" chipset, which is compatible with both Baofeng’s latest stock updates and OpenGD77.
How to check: Remove the battery and look at the PCB (Printed Circuit Board) inside the battery compartment. If you see a large chip labeled "STM32F405," you have a V2. If you see a "BK4819" or unlabeled main processor, proceed with extreme caution—stick to official Baofeng updates only. Step 4: First Boot
1. Fixing the "DMR Audio Lag" and "Motorboat" Sound
Early stock firmware on the DM-1702 suffered from horrific digital audio decoding. The first syllable of every transmission was often clipped. OpenGD77 firmware completely rewrites the AMBE+2 vocoder handling, eliminating this lag and providing crystal-clear audio.
Stock Firmware vs. OpenGD77: Which One Should You Choose?
| Feature | Stock Firmware (Latest) | OpenGD77 Custom Firmware | | :--- | :--- | :--- | | User Interface | Clunky, monochrome-looking on color screen | Clean, customizable, color-coded zones | | Dual Slot Monitor | No (you miss calls on the other timeslot) | Yes (true dual-slot DMR reception) | | Audio Quality | Acceptable, occasional digital artifacts | Excellent, superior AGC (Automatic Gain Control) | | Satellite Ops | No | Yes (built-in Doppler shift correction) | | Ease of Programming | Poor (CPS is buggy) | Excellent (OpenGD77 CPS is intuitive) | | Risk Level | Low | Medium (requires careful hardware check) |
Recommendation: If you are a casual analog user, stick with the latest stock firmware. If you are a DMR enthusiast, install OpenGD77. It’s night and day.
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.
Step 4: First Boot
- Turn the radio ON. The OpenGD77 splash screen should appear.
- You will likely see "Calibration Data Missing" or scrambled frequencies. (This is because the OpenGD77 firmware stores calibration data differently).
- Critical Step: Use the OpenGD77 CPS (not the Baofeng one) to restore your calibration. Go to "Calibration" -> "Load from file" and select the
.datfile you backed up earlier. Write this to the radio. - 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.