: Many versions of the VHM-314 lock the firmware , meaning serial pads might be disabled. If you cannot get an "OK" response after sending AT , the board may not support permanent name changes without specialized factory programming tools.
Select the correct COM port and set the baud rate (commonly 115200 or 9600 depending on the firmware version).
This method is perfect for 99% of users. It instantly solves the identification problem.
Beyond the simple "cool factor," renaming your module is practical for: Identification:
Compile the project to generate a new .bin or .bfu firmware file. Put the VHM-314 into bootloader mode (often achieved by pulling a specific pin to ground during power-up) and use the flashing tool to upload the new firmware over the serial interface. Vhm-314 Change Name
Connect the TX and RX pads of the VHM-314 to the corresponding RX and TX pins of your USB-to-TTL adapter. Connect the ground (GND) pins together.
Power up the VHM-314 by connecting its 5V/GND pads to the adapter, or via its built-in Micro-USB/USB-C port. Click the "Read" or "Connect" button in the software. If successful, the software will populate fields showing the current configuration, including the name "VHM-314".
Tap the next to the connected "VHM-314" device profile. Tap the Edit/Pencil icon in the top right corner. Input your custom name and hit Save . On Apple macOS: Open System Settings and go to Bluetooth .
Please modify these examples to suit your specific situation, including adding or removing details as necessary. : Many versions of the VHM-314 lock the
Below is a comprehensive guide detailing the methods available to change the Bluetooth name on a VHM-314 module, ranging from software tools to hardware reprogramming.
For makers, builders, and small audio businesses who need the module to broadcast a unique brand identifier natively to all nearby scanning smartphones, the factory ROM must be modified or bypassed.
Open the SDK configuration file (typically a .h or .c file named board_config or app_config ). Locate the macro line defining the Bluetooth name: #define BT_NAME "XY-BT" . Change the text inside the quotation marks to your custom name.
Use the "Read All" command to pull the current configuration. Locate the key. This is where the broadcast name is stored. This method is perfect for 99% of users
In some catalogs, it is simply listed as or "NMCNA-7 (formerly Vhm-314)."
A computer with hex editing software (e.g., HxD) and programmer software (e.g., NeoProgrammer or AsProgrammer). Step-by-Step Process:
Go to the tab, type the new name in the text field, and click Apply . Option 2: Changing the Name Permanently (Hardware Level)
Locate the field labeled "BT Name" , "Local Name" , or "Device Name" . Delete the default string and type your new custom name (e.g., "Living Room Speaker"). Keep the name under 20 alphanumeric characters to ensure stability.
Method 1: Flashing the Chipset via JL-Programmer (The Official Hardware Approach)
