Terminology » Bluetooth » BLE Advertising and Data Channels Explained

BLE Advertising and Data Channels Explained

bluetooth ble data channel advertising channel wireless communication

This page provides information about the list of BLE (Bluetooth Low Energy) channels, covering both advertising and data channels.

Introduction

  • BLE (Bluetooth Low Energy) is the latest in the series of Bluetooth standards published by Bluetooth SIG. The latest version is 5.1, released after v4.2 and v5.0.
  • Devices (Initiator/master and Advertiser/slave) communicate in point-to-point and broadcast modes using advertising and data channels.

Bluetooth Smart or BLE frequency channels

Figure 1: Bluetooth Smart or BLE frequency channels

The figure above depicts a list of BLE (Bluetooth Low Energy) channels. Bluetooth operates in the 2.4 GHz ISM Band, spanning from 2400 to 2483.5 MHz. BLE channels are spaced 1 MHz apart.

Let’s delve into the use and function of these BLE channels, along with their frequency values.

BLE Advertising Channels

  • These channels carry broadcast data for applications.
  • They facilitate the discovery of slaves for connection purposes.
  • BLE devices use these channels to transmit/receive advertising packets of various types, carrying advertising channel PDUs.
BLE Channel NumberFrequency Value
372402 MHz
382426 MHz
392480 MHz

BLE Data Channels

  • Once a connection is established between master and slave, devices can exchange data.
  • This is achieved by exchanging data channel PDUs during scheduled connection events.
  • Master and slave BLE devices utilize these data channels for transmission/reception.
BLE Channel NumberFrequency Value
02404 MHz
12406 MHz
22408 MHz
32410 MHz
42412 MHz
52414 MHz
62416 MHz
72418 MHz
82420 MHz
92422 MHz
102424 MHz
112428 MHz
122430 MHz
132432 MHz
142434 MHz
152436 MHz
162438 MHz
172440 MHz
182442 MHz
192444 MHz
202446 MHz
212448 MHz
222450 MHz
232452 MHz
242454 MHz
252456 MHz
262458 MHz
272460 MHz
282462 MHz
292464 MHz
302466 MHz
312468 MHz
322470 MHz
332472 MHz
342474 MHz
352476 MHz
362478 MHz

References

  • BLUETOOTH CORE SPECIFICATION Version 5.1
  • Previous versions of Bluetooth 5.0 or Bluetooth Low Energy (BLE)