微型蓝牙音频／语音通话模块（按键版）

一、产品特点：

  1. 24位DAC输出，音质好。
  2. 带语音提示。
  3. 接听/回拨电话，电话语音报号功能。
  4. 带USB声卡。
  5. 板上只带红蓝双色LED，状态显示直观。
  6. 带音频输出，直接驱动耳机或者方便普通音箱升级改装。
  7. 3.3-5.0V宽电源电压输入。


 二、产品参数：

三、接线／功能示意图： 
Micro Bluetooth audio / voice module (key version)

First， the product features:

24-bit DAC output， good sound quality.
With voice prompts.
Answer / call back telephone voice reporting function.
With USB sound card.
Board only with red and blue color LED， status display and intuitive.
With audio output directly drive headphones or ordinary speakers easy upgrade modifications.
3.3-5.0V wide input supply voltage.

  Second， the product parameters:

Output power: 500mW (drive headphones) or 2W * 2 (speaker driver)
Frequency range: 50Hz-18KHz
Equivalent noise: ≥30dB
Supply voltage: 3.3V-5.0V
Supply Current: maximum volume to drive the headphone 50mA， 500mA drive speaker maximum volume
Channel: Stereo
Bluetooth version: Bluetooth 3.0 (compatibility)
Bluetooth transceiver band: 2.4-2.485GHz
Bluetooth Type: Audio / voice call
Size: 48.8X26.5X7mm
Weight: about 6g
Third， the wiring / schematic features:

四、操作说明：

  1. 电源
    模块对应端口-，+分别接电源（电池）的负极和正极，电源建议用电池或者其他稳压电源。本模块正常工作电压为3.3-5.0V，供电电压注意不要超过本范围。
  2. 按键功能
    NEXT/V+：短按下一曲，长按音量+；
    PREV/V-：短按上一曲，长按音量-；
    P/M：短按切换静音/非静音，长按切换模式（用于连接电脑的时候转到蓝牙模式）
    CALL：短按接听来电，长按回拨。
    REJECT：短按挂断电话。
  3. 音频输出
    本模块板载耳机插座，做为蓝牙模块的音频输出端口，音频输出功率为500mW可以驱动耳机（此端口输出的是音频信号不能直接驱动喇叭），或者连接外部功放设备，音频口有插入自动断开功放输出。
  4. 外接喇叭
    本模块板载2W*2 AB类音频功放可直接驱动小功率扬声器，扬声器分别接SP_L和SP_R端口即可（注意扬声器的正负极不要接反）。因功放IC属于功率输出器件，外接喇叭输出时，功放IC有发热属于正常现象，请勿生疑。
  5. LED状态显示
    本模块板载一只双色红蓝LED，用于显示蓝牙工作状态。
    等待连接状态:红蓝交替闪烁
    已连接手机状态:蓝灯长亮
    蓝牙播放音乐状态:红蓝同时灭4秒亮0.2秒周期闪烁
  6. MUTE控制(外部功放控制)
    板上MUTE输出端口可以控制外部功放的静音，正常播放的时候此端口输出高，暂停时输出低。
  7. 蓝牙连接步骤
    1）=>2）=>3）
    1）接通模块电源，红蓝双色LED交替闪烁。
    2）手机进入蓝牙设置界面下点击搜索蓝牙设备，搜索到一个名称为"Bluetooth playe"的蓝牙设备即为蓝牙模块。点击连接即可。
    3）打开手机音乐播放器播放音乐，此时手机音频就可以从蓝牙模块出来了。
  8. 蓝牙接听/拨打电话
    蓝牙与手机处于连接状态下，如果有来电，蓝牙会语音播报一次来电的电话号码并且响铃。可以按蓝牙模块上的CALL键接听来电或者REJECT键拒接或者挂断来电。在非通话状态下，也可以长按CALL键2秒回拨电话。

    五、注意事项：

    1. 电源电压严禁超过本模块的供电电压范围。
    2. 工作时不能触及模块的背面元件，以免影响本模块的正常工作或者引起短路烧毁模块。
    3. 关于音量大小问题，因每个人的需求不一样，本蓝牙模块预留了3.5mm音频信号输出接口和2路扬声器输出端口。音频信号输出端可以驱动耳机或者为外部音频功放提供音频信号，扬声器接口则可以直接接扬声器，不要责怪驱动扬声器音量不够大，2WX2输出功率是什么概念？ 大概就是笔记本电脑内置喇叭开到最大音量那么大声音。如果你想要更大功率的输出，只能外接音频功放（由模块的3.5mm音频信号输出端给功放提供信号）

    六、应用范围：
           普通音箱改装蓝牙音箱，蓝牙音频，USB声卡，蓝牙接/拨电话等。

    六、产品图片：


Fourth， the operating instructions:

power supply
Module corresponds to the port -， +， respectively， then the power supply (battery) negative electrode and a positive electrode， a battery or other power supply is recommended power supply. This module normal operating voltage of 3.3-5.0V， be careful not to exceed the supply voltage range.
Key Function
NEXT / V +: a short press， long press the volume +;
PREV / V-: a short press on， press volume -;
P / M: Press to switch mute / unmute， press the switch mode (for when connected to a computer to Bluetooth mode)
CALL: Press to answer a call， press back.
REJECT: short press to hang up.
Audio output
This module onboard headphone jack， audio output port as a Bluetooth module， an audio output power of 500mW can drive headphones (this port is an audio signal output can not directly drive speakers)， or connect an external power amp， audio insertion mouth off automatically open amplifier output.
External speakers
This module onboard 2W * Class 2 AB audio power amplifiers can directly drive a small speaker， which were connected to SP_L and SP_R port (note speaker of the positive and negative do not reversed). Power amplifier IC due to output devices belonging to external speaker output， the amplifier IC fever is a normal phenomenon， do not doubt.
LED status display
This module onboard a two-color red and blue LED， for displaying the working status of Bluetooth.
Waiting for connection status: blinking red and blue alternately
Connected phone state: long bright blue light
Bluetooth music playback status: red and blue light at the same time four seconds off 0.2 seconds Flashing
MUTE control (external amplifier control)
MUTE-board outputs can control mute external amplifier， when the normal play of the port output high and low output pause.
Bluetooth connection step
1) => 2) => 3)
1) power to the module， red and blue color LED flash alternately.
2) mobile phone into Bluetooth setting interface clicks search for Bluetooth devices to search for a name for the "Bluetooth playe" Bluetooth device is a Bluetooth module. Click the connection.
3) Open the mobile phone music player to play music， then you can phone the audio from the Bluetooth module.
Bluetooth answer / call
Bluetooth phone is connected， if there is an incoming call， Bluetooth will broadcast a voice call and the phone number to ring. You can press the CALL button to answer a call on a Bluetooth module or key REJECT to reject a call or hang up. In non-call state， you can also press the CALL button for 2 seconds to call back.
V. Note:

Shall not exceed the supply voltage of the module supply voltage range.
It can not touch the back of the work element module， so as not to affect the normal operation of the module or cause a short circuit burned modules.
On the volume size of the problem， because everyone's needs are different， this Bluetooth module reserved 3.5mm audio output interface and 2-way speaker output ports. Audio signal outputs can drive headphones or audio signals to provide an external audio amplifier， speaker connection can be directly connected to the speaker， do not blame the driver speaker volume is not big enough， 2WX2 output power is what concept? Probably the laptop built-in speaker to maximum volume so big sound. If you want more power output， only an external audio amplifier (3.5mm audio signal provided by the signal output of the module to the amplifier)
Sixth， the scope of application:
   Modification ordinary speakers Bluetooth speakers， Bluetooth audio， USB sound card， Bluetooth connection / dial phones.

Six Picture: