BLE Advertising channels

This page mentions List of BLE (Bluetooth Low Energy) channels. It covers BLE Advertising channels and BLE (Bluetooth Low Energy) Data channels.

Introduction:
• BLE (Bluetooth Low Energy) is the latest in the series of bluetooth standards published by Bluetooth SIG. The latest bluetooth version is 5.1 released after v4.2 and v5.0.
• The devices (Initiator i.e. master and Advertiser i.e. slave) communicates in point-to-point and broadcasts modes. using advertising channels and data channels.

Bluetooth Smart or BLE frequency channels

The figure-1 depicts list of BLE (Bluetooth Low Energy) channels. Bluetooth operates in 2.4 GHz ISM Band. It spans from 2400 to 2483.5 MHz. BLE channels are spaced 1 MHz. Let us understand use or function of these BLE channels and their frequency values.

• It carry broadcast data for applications.
• It helps to discover slaves in order to connect with them.
• BLE devices use any of the following BLE advertising channels for transmission/reception of advertising packets of various types. These channels carry advertising channel PDUs.

BLE Channel Number	Frequency Value
37	2402 MHz
38	2426 MHz
39	2480 MHz

BLE Data channels

• Once connection is established between master and slave, devices can send data to one another. This is achieved by exchanging data channel PDUs during scheduled connection events.
• Master and slave BLE devices use any of the following BLE data channels for the transmission/reception.

BLE Channel Number	Frequency Value
0	2404 MHz
1	2406 MHz
2	2408 MHz
3	2410 MHz
4	2412 MHz
5	2414 MHz
6	2416 MHz
7	2418 MHz
8	2420 MHz
9	2422 MHz
10	2424 MHz
11	2428 MHz
12	2430 MHz
13	2432 MHz
14	2434 MHz
15	2436 MHz
16	2438 MHz
17	2440 MHz
18	2442 MHz
19	2444 MHz
20	2446 MHz
21	2448 MHz
22	2450 MHz
23	2452 MHz
24	2454 MHz
25	2456 MHz
26	2458 MHz
27	2460 MHz
28	2462 MHz
29	2464 MHz
30	2466 MHz
31	2468 MHz
32	2470 MHz
33	2472 MHz
34	2474 MHz
35	2476 MHz
36	2478 MHz

References:-

➤BLUETOOTH CORE SPECIFICATION Version 5.1

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