Bluetooth Low Energy device discovery tws earbuds online
  
Scanning is an important part of Bluetooth Low Energy advertising. Scanning is used to receive broadcast events. Scan time depends on how much time is spent scanning and how quickly other devices need to be discovered. bjbjaudio.com  <a style="opacity:0.0;color:#ffffff">tws earbuds online</a>    <a style="opacity:0.0;color:#ffffff">tws earbuds online</a>

Universal broadcast
Universal broadcasting is the most versatile broadcasting method. Devices performing general broadcasts can be scanned by scanning devices, or enter a connection as a slave device when a connection request is received. Universal broadcasts can be sent without a connection, in other words, there is no distinction between master and slave devices. bjbjaudio.com

directed broadcast
There are times when a connection between devices needs to be established quickly. If the slave wants to do this, it needs to broadcast. Directed broadcast events are all about establishing connections as quickly as possible. This message contains two addresses: the broadcaster's address and the initiator's address. After receiving the directed broadcast message sent to itself, the initiating device can immediately send a connection request as a response. Targeted broadcast events also have special timing requirements. The complete broadcast event must repeat every 3.75ms. This requirement makes the scanning device only need to scan 375ms to receive the message of the directional broadcast device.    <a style="opacity:0.0;color:#ffffff">tws earbuds online</a>
Sending so quickly would flood the broadcast channel with packets, preventing other devices in the area from broadcasting. Therefore, the directional broadcast cannot last for more than 128s. If the host does not actively request to stop, or the connection is not established, the controller will automatically stop broadcasting. Once 128s is reached, the host can only use generic broadcasts with much longer intervals for other devices to connect. When using directed broadcasts, devices cannot be actively scanned. In addition, the payload of the directed broadcast message cannot carry other additional data. The payload can only contain the two required addresses and nothing else. bjbjaudio.com    <a style="opacity:0.0;color:#ffffff">tws earbuds online</a>

Unconnectable broadcast
Unconnectable broadcast events are used by devices that do not want to be connected. Typical applications for such broadcasting include devices that only want to broadcast data, and do not want to be scanned or connected. This is also the only type of broadcast that can be used with only transmitter and no receiver devices. A non-connectable broadcast device does not enter the connected state, so it can only switch between broadcast and ready states at the request of the host. bjbjaudio.com    <a style="opacity:0.0;color:#ffffff">tws earbuds online</a>

discoverable broadcast
The last type of broadcast event is a discoverable broadcast. This broadcast cannot be used to initiate a connection, but allows other devices to scan for the broadcast device. This means that the device can be discovered, can both broadcast data and respond to scans, but cannot establish a connection. This is a broadcast form suitable for broadcast data, dynamic data can be included in broadcast data, and static data can be included in scan response data. bjbjaudio.com    <a style="opacity:0.0;color:#ffffff">tws earbuds online</a>