BT201 Dual-Mode 5.0 Bluetooth Audio Amplifier Board – Hi-Fi Stereo Receiver with TF/USB/BLE/AUX, SPP Serial & AT Command Control

SKU: FA2006-3-1
Product Model

BT201 Dual-Mode
Bluetooth Version

5.0 (Dual-Mode: BR/EDR & BLE)
Audio Inputs

Bluetooth, TF Card, USB Disk, 3.5mm AUX
Amplifier Output

2 x 5W (Class D Stereo)
Power Input

DC 5V – 12V (typical range)
Supported Formats

MP3, WMA, WAV, FLAC, APE
SNR

>90dB
THD+N

<0.1%
Communication Interface

UART (SPP serial port, AT command support)
Dimensions

Approx. 45mm x 32mm
The BT201 Dual-Mode 5.0 Bluetooth Audio Amplifier Board is a highly integrated, versatile audio solution offering Bluetooth 5.0 connectivity, multiple input options (TF card, USB, AUX), and high-fidelity audio output. Its dual-mode capability (Classic Bluetooth and BLE) and AT command support make it a powerful choice for both standard DIY audio upgrades and complex industrial applications.
Description
The BT201 Dual-Mode 5.0 Bluetooth Audio Amplifier Board is a professional-grade audio module that seamlessly integrates wireless audio reception, digital decoding, and power amplification onto a single compact PCB. It utilizes the robust Bluetooth 5.0 protocol, supporting both Classic Bluetooth (BR/EDR) for high-quality audio streaming (compatible with A2DP, AVRCP, HFP, HSP) and Bluetooth Low Energy (BLE) for advanced data communication via SPP serial port and AT command control.
Unlike basic receiver boards, the BT201 offers exceptional flexibility with multiple audio inputs: Bluetooth wireless, TF card, USB disk playback, and a 3.5mm AUX line-in jack. The board features an onboard 2x5W stereo amplifier, capable of driving passive speakers directly, eliminating the need for an external amplifier in most standard applications.
The true strength of the BT201 lies in its customizability and control options. With support for AT commands via the serial port (UART interface), users can manipulate the module’s behavior, switch audio sources, control playback, and even modify broadcast names, making it an ideal solution for business purchasing and custom product integration. The integrated 3W/5W mono Class D amplifier output is suitable for various speaker impedances (typically 2Ω to 8Ω).
Features
  • Dual-Mode Bluetooth 5.0: Supports both Classic Bluetooth (BR/EDR) for audio streaming and BLE for data transmission and AT command control.
  • Multiple Audio Inputs: Includes Bluetooth Receiver, TF card reader, USB disk interface, and 3.5mm AUX line-in.
  • Integrated Power Amplifier: Onboard 2x5W stereo Class D amplifier allows for direct connection to passive speakers.
  • SPP Serial Communication: Enables advanced configuration and control via AT commands for professional integration.
  • High-Quality Audio: Supports lossless decoding of MP3, WMA, WAV, FLAC, and APE formats with excellent SNR and low distortion (Hi-Fi stereo output).
  • Flexible Power Input: Operates on a wide DC voltage range (typically 5V-12V, check specific product variant for exact range).
  • Hands-Free Calling: Built-in microphone support for hands-free phone calls (HFP profile).
  • Onboard Controls: Features buttons for source switching, play/pause, volume control, and track skipping.
Usage
The BT201 board is highly versatile and can be used in several modes:
  1. Connections:
    • Power: Supply 5V-12V DC power to the designated input terminals.
    • Speakers: Connect 4Ω/8Ω passive speakers to the SPK_L and SPK_R terminals (ensure correct polarity).
    • AUX (Optional): Use the 3.5mm jack for a wired input source.
  2. Operation:
    • Bluetooth: The module automatically enters Bluetooth mode upon power-up. Pair with your device (named “BT201” or similar).
    • Media Playback: Inserting a TF card or USB disk automatically switches the source to local playback. The “MODE” button can be used to cycle through inputs.
  3. Advanced Control: Connect the UART interface pins (TX/RX/GND) to a microcontroller or computer serial adapter to send AT commands for custom configuration (e.g., setting the EQ, changing device name)
Q: Does this board require an external amplifier?

No, this board has an integrated 2x5W Class D amplifier capable of driving standard passive speakers (2Ω-8Ω impedance) directly. It acts as an all-in-one solution.

Q: What is the "Dual-Mode" feature for?

Dual-mode means it supports both classic high-speed Bluetooth for music streaming (A2DP) and Bluetooth Low Energy (BLE) for data communication. The BLE mode is used for sending AT commands via a serial port, which is crucial for customized applications

Q: Can I change the Bluetooth name of the device?

Yes. This feature can be configured using the AT command set via the UART serial interface. This is particularly useful for commercial product integration

Q: How do I switch between Bluetooth, USB, and AUX inputs?

The board includes a “MODE” or “M” button on the PCB to cycle through the available audio sources.

Q: Is the sound quality good enough for Hi-Fi applications?

The BT201 uses advanced decoding and a high signal-to-noise ratio (>90dB) to offer high-fidelity audio output that is suitable for most desktop, bookshelf, and car audio retrofit applications

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