Wireless communication has become an invisible bridge in the Internet of Things connection, 그리고 Bluetooth, as a mainstream wireless communication technology, plays a vital role in the Internet of Things application. we receive inquiries from customers about the Bluetooth module sometimes, but during the communication process, I found that some engineers are still vague about the concept of the Bluetooth module as the master and slave, but we have a strong curiosity about technology, how can we tolerate the existence of such knowledge What about blind spots?

BLE peripheral “Slave”

Generally we call BLE Center “Master mode”, call BLE peripheral “Slave”.

BLE has the following roles: Advertiser, Scanner, 노예, Master, and Initiator, where the master is converted by the initiator and the scanner On the other hand, the slave device is converted by the broadcaster; Bluetooth module communication refers to the communication between two Bluetooth modules or Bluetooth devices. The two parties for data communication are the master and the slave

Master device mode: It works in master device mode and can connect with a slave device. In this mode, you can search for surrounding devices and select the slave devices that need to be connected for connection. 이론적으로, 하나의 Bluetooth 마스터 장치와 통신 할 수 있습니다 7 동시에 Bluetooth 슬레이브 장치. A device with Bluetooth communication function can switch between the two roles. 일반적으로 슬레이브 모드에서 작동하며 다른 마스터 장치가 연결하기를 기다립니다.. When needed, 마스터 모드로 전환하고 다른 장치로의 통화를 시작합니다.. When a Bluetooth device initiates a call in the main mode, 상대방의 블루투스 주소를 알아야합니다, 페어링 비밀번호, 그리고 기타 정보. 페어링이 완료된 후, 호출은 직접 시작할 수 있습니다.

FSC-BT616 TI CC2640R2F BLE 5.0 기준 치수

Slave device mode: The Bluetooth module working in slave 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.

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