Features:
- Bluetooth Version: V4.2
- Lossless decoding: WAV/WMA/FLAC/APE/MP3
- Stereo dual-channel output
- Bluetooth range: up to 20 meters (open area)
- Compact design, suitable for DIY audio projects
Blue Indicator Light:
- Fast blinking: No Bluetooth connection
- Always on: Bluetooth connected
- Slow blinking: Music playback in progress
Pinout of the Module:
| Pin Number | Pin Header | Description |
|---|---|---|
| 1 | 5V | Power-positive 5V |
| 2 | GND | Negative power-supply |
| 3 | VBAT | Lithium battery positive 3.7–4.2V |
| 4 | L | Left channel output |
| 5 | R | Right channel output |
| 6 | AGND | Audio ground |
Powering the Module:
You can power the module via a MICRO USB cable (5V) or use either a 5V regulated power supply or a 3.7V lithium battery.
- 5V input: Connect to 5V and GND pins
- 3.7V lithium battery: Connect to VBAT and GND
Audio Output:
Connect the audio output to a 3.5mm headphone jack or directly wire to a power amplifier input via L, R, and AGND pins.
Precautions & Warnings:
- Warning 1: Charging interface uses current-limiting without battery protection. Only use lithium batteries with protection circuits from reputable manufacturers.
- Warning 2: Default power supply is 5V. To use a 3.7V lithium battery, you must replace the onboard diode with a 0-ohm resistor or short the pad. Custom batches for 3.7V power supply are available.
- MUTE Port: Outputs 3.3V when muted, 0V during playback. Compatible with amplifier mute circuits depending on polarity.
- Signal Interference: Avoid placing the module near metal or high-frequency wireless transmitters to prevent Bluetooth signal issues.
- Noise or Static: Use thick ground wires and avoid using plug-in wires. Connect grounds between Bluetooth module and amplifier board carefully. For best results, power both boards separately.
Features:
- Bluetooth Version: V4.2
- Lossless decoding: WAV/WMA/FLAC/APE/MP3
- Stereo dual-channel output
- Bluetooth range: up to 20 meters (open area)
- Compact design, suitable for DIY audio projects
Blue Indicator Light:
- Fast blinking: No Bluetooth connection
- Always on: Bluetooth connected
- Slow blinking: Music playback in progress
Pinout of the Module:
| Pin Number | Pin Header | Description |
|---|---|---|
| 1 | 5V | Power-positive 5V |
| 2 | GND | Negative power-supply |
| 3 | VBAT | Lithium battery positive 3.7–4.2V |
| 4 | L | Left channel output |
| 5 | R | Right channel output |
| 6 | AGND | Audio ground |
Powering the Module:
You can power the module via a MICRO USB cable (5V) or use either a 5V regulated power supply or a 3.7V lithium battery.
- 5V input: Connect to 5V and GND pins
- 3.7V lithium battery: Connect to VBAT and GND
Audio Output:
Connect the audio output to a 3.5mm headphone jack or directly wire to a power amplifier input via L, R, and AGND pins.
Precautions & Warnings:
- Warning 1: Charging interface uses current-limiting without battery protection. Only use lithium batteries with protection circuits from reputable manufacturers.
- Warning 2: Default power supply is 5V. To use a 3.7V lithium battery, you must replace the onboard diode with a 0-ohm resistor or short the pad. Custom batches for 3.7V power supply are available.
- MUTE Port: Outputs 3.3V when muted, 0V during playback. Compatible with amplifier mute circuits depending on polarity.
- Signal Interference: Avoid placing the module near metal or high-frequency wireless transmitters to prevent Bluetooth signal issues.
- Noise or Static: Use thick ground wires and avoid using plug-in wires. Connect grounds between Bluetooth module and amplifier board carefully. For best results, power both boards separately.