Bluetooth 5.1 Audio Receiver MP3 Lossless Decoder Board
High-Fidelity Wireless Audio Module for DIY Speakers and Sound Systems
This Bluetooth 5.1 audio receiver board is a compact MP3 lossless decoder module, designed to add high-quality wireless audio streaming capabilities to speakers, amplifiers, and custom audio projects.
Lossless Audio Decoding Supports highfidelity formats like FLAC, APE, and WAV for superior sound quality
Bluetooth 5.1 Connectivity - Provides stable wireless audio transmission over distances up to 15 meters
Operating voltage is 3.7V to 5V DC via Micro USB, Type-C, or solder pads for lithium battery connection
Search for "HW-BT" on your device to pair; the blue LED will indicate connection status.
Requires a clean, stable power supply. Some phone chargers may introduce hum in standby mode.
Technical Specifications
| Parameter | Value |
|---|
| Bluetooth Version | 5.1 |
| Audio Output | Stereo via 3.5mm jack or solder pads |
| Output Quality | SNR 90dB, THD+N -70dB |
| Supported Formats | MP3, WMA, WAV, FLAC, APE |
| Control Interface | UART for advanced control |
| Antenna | PCB trace antenna |
| LED Indicator | Shows power and pairing status |
## Key Features
Lossless Audio Decoding Supports highresolution formats for superior sound reproduction
USB Power and 3.5mm Audio Output - Simple connectivity for power and audio devices
Visual and Audio Status - LED indicator and voice prompts for pairing confirmation
UART Serial Control - Allows advanced integration with microcontrollers for custom applications
# Applications
- Building custom Bluetooth speakers or sound systems
- Adding wireless audio to car stereos
- Portable audio device enhancements
- Educational projects in audio and wireless technology
- Creating interactive installations with audio
HighFidelity Sound Quality Delivers rich, detailed audio with low distortion and high signaltonoise ratio
UserFriendly Design Voice prompts, simple pairing, and clear status indicators for easy setup
√ Compatible with a wide range of Bluetooth audio sources
√ Compact board for easy integration into DIY projects
√ Supports headphones, amplifiers, and active speakers
## Troubleshooting
No sound output:
- Verify power supply (3.7V-5V) and connections
- Check audio output connection to amplifier or speakers
- Ensure Bluetooth device is connected and audio is playing
Poor audio quality:
- Check Bluetooth connection stability
- Use lossless audio source for best quality
- Avoid interference from other wireless devices
Pairing fails:
- Ensure board is in pairing mode (LED flashing)
- Check device compatibility (A2DP profile required)
- "Forget" the device on your phone and try again
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