BT401 Bluetooth Module - Complete Setup Guide #innovation #bluetooth #bl...


🎧 [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!

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KT148A Voice Chip at Baidu Baike

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KT148A Voice Chip Issue: Difficult to Play with Code Sending - Normal Playback After Grounding Pin 4, What’s the Reason?

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Problem Description: Hello, we’ve encountered an issue and would appreciate your support: With the KT148A chip, after powering on, sending the code rarely triggers playback. However, if we use tweezers to briefly short Pin 4 (PB0) to ground and then send the code again, playback works normally. What could be causing this? Based on the observed behavior, it’s highly likely an issue with the timing of one-wire communication,  particularly with the start signal, which may be too short.  Let’s analyze this in detail and review the KT148A schematic as follows: 1. Pin 4 (PB0) of the Chip: PB0 is a test pin with the default factory function of triggering wake-up and playback when grounded. 2. Customer Description: When the customer uses tweezers to short PB0 (Pin 4) to ground, it follows this principle. The shorting action actually performs two operations: Action 1: The KT148A detects a falling edge signal, wakes up, exits low-power mode, and enters full-speed operation. Action 2: Th...
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KT1025A Dual-Mode Bluetooth Audio Chip Layout Description and Design Precautions

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