There are different types of connections available for the بلي device. أ بلي connected item may have up to 4 different functions:

1. Broadcaster

ال “Broadcaster” shall be used as a server. هكذا, its purpose is to transfer data to a device on a regular basis, but it does not support any incoming connection.

A typical example is منارة based on بلوتوث طاقة منخفضة. When the منارة is in the broadcast mode, it is generally set to a non-connectable state. منارة will broadcast a data packet to the surroundings at regular intervals. As an independent بلوتوث host, it will receive Beacon broadcasts at intervals when performing scanning actions Out of the packet. The content of the packet can contain up to 31 bytes of content. في نفس الوقت, when the host receives the broadcast packet, it will indicate the MAC address, Received Signal Strength Indicator (RSSI), and some application-related advertising data. The picture below is beasycom BP103: بلوتوث 5 منارة صغيرة

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2. Observer

In a second step, the device may only monitor and read the data sent by a “broadcaster”. In such a case, the object is not able to send any connection to the server.

A typical example is Gateway. بلي Bluetooth is in observer mode, no broadcast, it can scan the surrounding broadcast equipment, but cannot require connection with the broadcast equipment. The picture below is beasycom Gateway BP201: بلوتوث منارة بوابة

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3. Central

Central usually consists of a smartphone or tablet. This device provides two different types of connection: either in advertising mode or in connected mode. It is leading the overall process as it triggers data transfer. The picture below is beasycom BT630, based on nRF52832 chipset, it supports three modes: central, peripheral, central-peripheral. Small Size وحدة البلوتوث nRF52832 Chipset

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4. المحيط

Peripheral device allows connections and data transfer with the Central on a periodical basis. This system´s goal is to ensure universal data transmission by using the standard process, so that other devices also may read and understand the data.

The Bluetooth Low Energy module working in peripheral mode is also in the broadcast state, waiting to be scanned. Unlike the broadcast mode, ال وحدة البلوتوث in the slave mode can be connected, and acts as a slave during data transmission.

Most of our BLE modules could support central plus peripheral mode. But we have firmware supporting peripheral-only mode, the picture below is Feasycom BT616, it has firmware supporting peripheral-only mode: بلي 5.0 الوحدة النمطية CC2640R2F شرائح

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