There are different types of connections available for the ble 장치. 에이 ble connected item may have up to 4 different functions:

1. Broadcaster

그만큼 “Broadcaster” shall be used as a server. 따라서, 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 봉홧불 based on 블루투스 낮은 에너지. 때 봉홧불 is in the broadcast mode, it is generally set to a non-connectable state. 봉홧불 will broadcast a data packet to the surroundings at regular intervals. As an independent 블루투스 주인, 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. 동시에, 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 Feasycom BP103: 블루투스 5 미니 비콘

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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. ble 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 Feasycom Gateway BP201: 블루투스 비콘 게이트웨이

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3. 본부

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 Feasycom BT630, based on nRF52832 chipset, it supports three modes: 본부, 주변, central-peripheral. Small Size 블루투스 모듈 nRF52832 Chipset

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4. 주변

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, 그만큼 블루투스 모듈 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: ble 5.0 기준 치수 TI CC2640R2F Chipset

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