It is a wireless Bluetooth audio transmitter-receiver module. It has transmitted mode (input AUX audio) and receives mode (output EP audio).
1>.Transmit and receive modes
1>.Product Name:Wrieless Bluetooth Audio Transmitter Receiver Module
3>.Bluetooth Protocol:BLE 4.2
1>. The car Bluetooth connection protocol is different from the normal Bluetooth connection, and most cars cannot be connected.
2>. Switching mode is long-press the button, and then power on.
3>. If the Bluetooth module cannot connect to the Bluetooth speaker.
1.1>. First, check the status of the indicator light and check if it is flashing fast.
1.2>. Also, check whether the module is in the transmitting state and pay attention to the jumper cap to be removed.
1.3>. Is your Bluetooth slave device external? At the same time, the password of your Bluetooth slave device is “0000”.The password of the slave device must be 0000 to be connected by our module.
4>. The module can be connected to a 3.7V lithium battery, or it can be used in a dry cell, but the voltage should be higher than 3.4V.
5>. The module itself has a lithium battery charging circuit. You can charge Shenchi through MicroUSB, and the charging current is about 200m4.
6>. The transmitting part of Bluetooth is dual-tone, and our module is transmitting the dual-channel audio source.
7>. The receiving part of Bluetooth is also two-channel and has stereo output.
8>. The distance of this module is about 10 meters in a straight line.
9>. If the user finds noise during the use of the module, he can troubleshoot from the following aspects:
1.1>. The power supply selected is too poor, because the noise has a great relationship with the power supply ripple, it is recommended to use the USB output of the mobile power supply to try it. The battery is relatively clean and will not produce noise. In addition, we have tested that the charging heads of most brands of mobile phones are normal and there will be no noise.
1.2>. When the cable used by the user is inserted into our module, it may not be connected securely, resulting in not having a good common ground, which will also generate noise.
10>. The Bluetooth name of the Bluetooth module is: BT-EMMIT2-MIC
5. Function Description:
1>. If the module is in transmit mode. The device can search for connected devices automatically after power-on. If it is not found, it will search until it is found.
2>. The button on the module is a multifunctional button.
1.1>.Long press: Play/Pause
1.2>.Short press: Adjust the volume. The volume can be saved after power off. The volume can be adjusted from high to low and then from low to high.
1.3>. The volume of Bluetooth transmission cannot be adjusted. If you want to adjust, you can only adjust the volume of the receiving end.
3>. The module supports the MICRO USB power supply, the Android charging cable. It can be connected to a computer or a charging head.
4>. There is a battery connector on the board. Pay attention to the positive and negative electrodes.
5>. Connect the computer and enter the sound card mode to play the computer’s audio. For a simple power supply, please connect the charging head.
6>. The paired device must enter pairing mode before it can be found by our transmitting module.
7>. The installation of the transmitting module cannot be surrounded by an iron case, because the metallic ash absorbs wireless signals.
1>.1pc Wireless Bluetooth Audio Transmitter Receiver Module