| Image | Model | Package | Bluetooth | Audio Formats | Storage | Best For |
|---|---|---|---|---|---|---|
 | WT2605B05 Bluetooth Module | 20-pin module | 5.0 (BR/EDR + BLE) | MP3, WAV | Flash / TF / USB | Plug-and-play integration |
 | WT2605B03 Bluetooth Module | SOP-24 / Module | 5.0 (BR/EDR + BLE) | MP3, WAV | Flash / TF / USB | Custom PCB design |
Both modules share identical functionality. Choose WT2605B05 for plug-and-play integration, or WT2605B03 for custom PCB designs.
Transform traditional speakers into wireless smart devices with Bluetooth audio streaming, local MP3 playback from SD cards, and voice prompt support via built-in Flash storage.
Power Bluetooth headphones and earbuds with high-quality AAC codec support, compact 23×15mm form factor, and low power consumption extending battery life significantly.
Upgrade vehicle entertainment with hands-free calling, music streaming from smartphones, USB/SD card playback, and auto-reconnect functionality when entering the vehicle.
Enable voice-controlled IoT devices with dual-mode Bluetooth connectivity, low standby power consumption for always-on applications, and customizable audio alerts for home automation systems.
Integrate wireless audio into maker projects using simple UART control, Arduino/ESP32/Raspberry Pi compatibility, and extensive AT command set for custom applications.
Add audio feedback to machinery with Flash-based voice prompts, UART integration with PLCs and embedded systems, and reliable operation in -40°C to +85°C environments.
Since 1999, 25+ years of audio IC manufacturing expertise. High integration reduces components and failures. Reliable operation from -40°C to +85°C.
Integrated Bluetooth and audio reduce chip count. Pre-certified Bluetooth cuts certification costs. Flexible Flash/SD/USB storage lowers BOM costs.
Comprehensive AT commands via standard UART interface. Example code available for Arduino, ESP32, and STM32. Module format enables rapid prototyping.
USB firmware updates enable field updates. Factory programming available for custom names and content. Compact 23×15mm footprint fits small enclosures.
An MP3 Bluetooth module combines wireless Bluetooth audio streaming with local MP3 file playback in a single integrated component. It acts as a complete audio solution, receiving audio wirelessly from smartphones while also playing stored audio files from Flash memory, SD cards, or USB drives. The WT2605 series enhances this with Bluetooth 5.0, dual-mode support, and UART control for professional applications.
Both models offer identical features and specifications. The WT2605B05 is a standard 20-pin module optimized for production integration. The WT2605B03 is available in both module and SOP24 chip formats, providing flexibility for custom PCB designs. They share the same AT command set, audio quality, and storage options.
Yes, the WT2605 uses standard UART serial communication (115200 baud, 3.3V TTL) compatible with Arduino, Raspberry Pi, ESP32, and STM32 platforms. Arduino boards with 5V logic require a level shifter, while 3.3V boards and Raspberry Pi connect directly. Sample code is available for all major platforms.
The module supports MP3 (8-320kbps) and WAV (PCM format) files across all standard sampling rates (8-48KHz). For Bluetooth audio, it supports SBC and AAC codecs. AAC provides higher quality on iOS devices. Recommended: 128-320kbps MP3 for music, 32-64kbps for voice prompts.
Three storage options: Internal Flash (up to 128Mbit) for permanent system sounds, TF/microSD cards (up to 32GB) for large music libraries, and USB drives (up to 32GB) for easy file updates. All support FAT/FAT16/FAT32 file systems. Files can be organized in the root directory or folders with 5-character names.
Typical range is 10 meters (33 feet) in open environments. Indoor performance averages 5-8 meters through walls. Range depends on antenna design, PCB layout, and environmental interference. Proper ground plane isolation and antenna placement optimize performance. Extended range is possible with external antennas.
Yes, the module supports microphone recording and Bluetooth call recording. Audio can be saved to TF cards or USB drives in MP3 or WAV format with configurable quality settings. Control recording via UART AT commands with flexible file naming options (index or custom filenames).
Fully compatible with both platforms. iOS devices benefit from AAC codec support for enhanced audio quality. Android works with SBC and AAC codecs. Both support standard Bluetooth profiles—no app required. Features include battery level display, media controls, and hands-free calling. Also compatible with Windows and Mac computers.
Operating voltage range: 3.3V – 5.0V DC. Recommended sources include USB 5V power, single Li-ion/Li-Po cell (3.7V), or regulated 3.3V supplies. Current consumption: 25-100mA during playback, <10mA standby. Add 10μF + 0.1μF filter capacitors near VCC. A 1000mAh battery provides approximately 20 hours of playback.
Use the USB drive update method: place firmware files on a USB drive, insert into the module’s USB port, and power on. The module automatically detects and installs updates, typically completing in 30-60 seconds. Verify the new version using the AT command query. Custom firmware for specialized features is available through WayTronic.
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