Introduction

The VHM-314 Bluetooth Audio Receiver is a compact, high-quality audio module that enables wireless audio streaming to any wired speaker system. Supporting the latest Bluetooth 5.0 standard, it delivers crystal-clear stereo sound with low latency and stable connectivity.

Key Features

Technical Specifications

Pin Configuration

Pin	Label	Description
1	VCC	Power input (3.7-5V)
2	GND	Ground
3	L-OUT	Left channel audio output
4	R-OUT	Right channel audio output
5	BT_STATUS	Bluetooth connection indicator
6	MODE	Operation mode selection

Connection Diagram

Typical Wiring

1. Connect 5V power to VCC and GND
2. Connect L-OUT/R-OUT to amplifier input
3. Optional: Connect BT_STATUS to LED
4. Optional: Add power switch to VCC line

Tip: Use shielded audio cables for best noise immunity

Operation Instructions

Arduino Integration

// Arduino Bluetooth Status Monitor
const int btStatusPin = 2; // Connected to BT_STATUS

void setup() {
  Serial.begin(9600);
  pinMode(btStatusPin, INPUT);
}

void loop() {
  int status = digitalRead(btStatusPin);
  
  if(status == HIGH) {
    Serial.println("Bluetooth connected");
  } else {
    Serial.println("Bluetooth disconnected");
  }
  
  delay(1000);
}

Troubleshooting

Application Examples