Wireless communication has become an invisible bridge in the Internet of Things connection, وبلوتوث, 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, عبد, 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. من الناحية النظرية, يمكن لجهاز Bluetooth رئيسي واحد التواصل معه 7 أجهزة الرقيق بلوتوث في نفس الوقت. A device with Bluetooth communication function can switch between the two roles. يعمل عادةً في الوضع التابع وينتظر اتصال الأجهزة الرئيسية الأخرى. When needed, يتحول إلى الوضع الرئيسي ويبدأ المكالمات إلى الأجهزة الأخرى. When a Bluetooth device initiates a call in the main mode, فهو يحتاج إلى معرفة عنوان البلوتوث الخاص بالطرف الآخر, كلمة مرور الاقتران, وغيرها من المعلومات. بعد اكتمال الاقتران, يمكن بدء المكالمة مباشرة.

FSC-BT616 TI CC2640R2F BLE 5.0 الوحدة النمطية

Slave device mode: The Bluetooth module working in slave mode can only be searched by the host, ولا يمكن البحث عنها بشكل نشط. بعد توصيل الجهاز التابع بالمضيف, يمكنه أيضًا إرسال واستقبال البيانات مع الجهاز المضيف.

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