Common Bluetooth module working mode earphone bone conduction

1. Master device mode
The Bluetooth low energy module supports master mode. The Bluetooth module in the host mode can search for surrounding devices and select the slave to be connected to connect. It can send and receive data, and can also set the MAC address of the default connection slave, so that the module can find this slave module and connect it as soon as the module is powered on.
Note: If users want to perform one-to-one transparent data transmission, they need to use our master device to connect our slave devices, and it is not supported to connect slave devices of other companies (because the built-in transparent transmission protocol is not compatible). But our slave device supports the standard BLE protocol, and users can develop it by themselves. www.bjbjaudio.com

2. Slave mode
The Bluetooth module working in this mode can only be searched by the host, and cannot be actively searched. After the slave device is connected to the host, it can also send and receive data with the host device.
Bluetooth 4.2 module: HY-40R204P, supports Bluetooth master-slave mode, can be used as a host or a slave, and the two working modes can be easily switched. www.bjbjaudio.com

3. Broadcast mode
In this mode, the Bluetooth module can broadcast one-to-many. Users can set the data broadcasted by the module through AT commands, and the module can continuously broadcast in low-power mode, which is used in applications with extremely low power consumption, small data volume, and one-way transmission, such as beacons, billboards, Indoor positioning, material tracking, etc. Such modules include Bluetooth 4.1 modules: HY-264018W, HY-264027P; Bluetooth 4.2 modules: HY-40R201P, HY-40R204P. www.bjbjaudio.com

4. Mesh networking mode
In this mode, multiple modules can be simply added to the network. Using star network and relay technology, each network can be connected to more than 65,000 nodes. The network and the network can also be interconnected, and finally countless Bluetooth modules can be connected Connect or directly control via mobile phone or tablet. And no gateway is required, even if one device fails, it will skip and select the nearest device for transmission. The entire networking process only requires the device to be powered on and set a communication password to automatically form a network, truly realizing simple interconnection.
Note: This mode will be subject to certain restrictions. First of all, because the module needs to switch modes continuously during the transmission process, the amount of transmitted data is limited to 20 bytes each time, and the transmission speed will be delayed for a few seconds. This scenario is similar Due to the UDP method, there is no guarantee that the data will be delivered to the destination module. www.bjbjaudio.com