How does the Baby Sound Module play music or sound effects stored on the main device?

The Baby Sound Module solution for playing music/sound effects stored on the main device is as follows:

• A Bluetooth audio module (such as the ANS-BT301M) that supports the A2DP/HFP protocol and integrates an audio decoder chip and amplifier circuit to drive the speaker is required.
• The main device (mobile phone/tablet) acts as the Bluetooth transmitter, and the module acts as the receiver to establish a stable connection.

• The module must be compatible with SBC/AAC/MP3 decoding formats to ensure it can play mainstream audio files.
• Select your local music library or custom sound effects for transmission via the mobile app.

• When developing based on the OpenHarmony system, you can use the UDP protocol. Receives audio control commands from the host device. Requires a pre-installed music storage chip or external TF card for storage expansion.

• The host device app transfers audio files in segments to the module's cache for playback.
• Supports remote pause/song switching and other control functions.

• Write WAV audio to the module's Flash memory via a USB-TTL tool.
• Decode and output the stored audio data stream when playback is triggered.

• Some modules support OTA updates to the sound effect library.