BLE Voice

🎧 [BT401 Bluetooth Audio Module - Full Demo] ⚡ Quick Setup Process: Power On → Bluetooth Search → Connected! Works instantly with smartphones 📱 🔊 Premium Audio Features: ✅ Lossless music support: FLAC/APE/WAV ✅ Dual-mode transmission: BLE + SPP ✅ I2S digital output & AUX input ✅ 128Kbps recording function 💡 Perfect For Smart Devices: • Bluetooth speakers & headsets • Car audio systems • Smart home controllers • Medical data collection 🛠️ Developer Friendly: Serial AT commands | MCU control | Mobile app integration #BluetoothModule #AudioTech #SmartDevices #IoT 👉 SWIPE to see the complete connection demo!

  Preface Thank you very much for using the JieLi (JL) Forced Upgrade Tool 4.0! Before officially using the tool, please read this manual carefully to ensure correct and safe operation. After reading, please keep this manual properly for future reference by others. If you encounter any issues during use that you cannot resolve, please contact our engineers at any time, and we will promptly provide you with the most effective support. User Manual Outline (detailed chapters will be updated and released progressively): 1. Upgrade and Download Instructions 1.1. Upgrade Operations 2. LED Status Descriptions 3. DIP Switch Instructions 3.1. Lower Four Bits of DIP Switch (only one bit can be switched at a time) 3.2. Upper Four Bits of DIP Switch (multiple bits can be switched simultaneously) 4. How to Update the Tool’s Own Firmware 4.1. Installing JieLi Package Manager 4.2. Remote Firmware Upgrade Operations 5. Virtual Serial Port 5.1. Setting Up the Virtual Serial Port 5.2. Serial Communi...