Vhm-314 Change Name -
The short answer for most VHM-314 users is . Unlike a smartphone or a high-end Bluetooth speaker, the VHM-314 is a simple, no-frills device. It does not have a user-accessible interface or support for the AT commands that would allow you to modify its core identifier. As the Raspberry Pi Official Magazine notes, "it's not usually possible to change the name of them". The firmware on these cheap modules is generally locked, and the manufacturer's only priority is low-cost production.
Inspect the VHM-314 PCB. Look for small, unpopulated copper pads labeled TX , RX , GND , and 5V (or VCC). On some ultra-compact revisions, these pins are not broken out to pads, meaning you must carefully solder wires directly to the physical pins of the SoC package (refer to the specific datasheet pinout for your chip model, such as the JL AC6925A).
Custom branding a DIY project with a unique name makes it look more polished.
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Some VHM‑314 variants store their firmware on an external SPI flash chip (an 8‑pin SOIC‑8 package next to the main processor). If your board has that chip, you can use a hardware programmer (like a TL866 or CH341A) to read the flash contents, search for the Bluetooth name string in the hex dump, overwrite it with a new name of the same length, and then write the modified firmware back to the flash. One blog post about domesticating a Bluetooth speaker’s firmware used exactly this approach to change notification sounds, but the author noted that is the hardest part.
While you cannot change the module's broadcast name, you can manage the confusion. The most direct method is to simply rename the device (phone or computer). In both Android and iOS, you can rename any paired Bluetooth device to something meaningful like "Workshop Speaker" or "Living Room Hi-Fi". This is a cosmetic fix that only helps you. Vhm-314 Change Name
Save the edited hex file, burn it back onto the SPI flash chip using the programmer, and solder the chip back onto the VHM-314 board. Alternative Solutions (If Reprogramming is Unfeasible)
To understand how to change the name, you must first look at the components on the board. The VHM-314 is built around a highly integrated Bluetooth system-on-chip (SoC), typically from the JieLi (JL) AC69xx series (such as the AC6925A or AC6921A).
Put the chip into its bootloader or program mode (which sometimes requires pulling a specific pin to ground during power-up, depending on the generation of the JL chip). Click the write/burn button in the software utility to upload the modified hex binary directly to the chip's memory. The short answer for most VHM-314 users is
Unlike consumer Bluetooth speakers that offer a smartphone app for customisation, the VHM‑314 is a bare‑circuit‑board OEM component. There is no app, no web interface, and no driver software that lets you tweak settings after the board is powered on.
Burn the modified hex file back onto the EEPROM chip. Re-solder the chip to the VHM-314 if it was removed.
Examine the main integrated circuit (IC) on your VHM-314 board. It will usually have a marking starting with "AC" or "JL" (e.g., AC20BP, AC6925F). Locate the data sheet or pinout diagram for your specific chip version to find the and RX (Receive) debugging pins. On many VHM-314 variants, these test points are exposed as small silver pads on the underside of the PCB. 2. Connect to the USB-to-TTL Adapter As the Raspberry Pi Official Magazine notes, "it's
Flashing incorrect firmware variants or interrupting a write process on JieLi microcontrollers can permanently corrupt the chip's bootstrap loader, rendering the VHM-314 permanently non-functional. Given the low price point of the module, hardware flashing is primarily pursued as an educational exercise or for commercial scaling.