Bluetooth LE AT Example

This document mainly describes Bluetooth® Low Energy AT order set detailed examples of commands.

Important

The following example uses two development boards at the same time, with one as the slave and the other as the host.

Explanation: Note Optional instructions can be set or not set, according to their actual situation to decide whether to set.

BLE communication based on Gatt

Slave:

  1. Set the Bluetooth name. If not set the default is ai-thinker. (Optional, must be set before enabling slave mode)

Command:

AT+BLENAME=ai-thinker

Response:

OK

  1. Enable slave mode

Command:

AT+BLEMODE=0

Response:

OK

Host:

  1. Enabling host Mode

Command:

AT+BLEMODE=1

Response:

OK

  1. Scan for nearby devices (optional, set after host mode is enabled)

Command:

AT+BLESCAN=1

Response:

OK

Devices Found:1/5
name:ai-thinker
MAC:a81710d8f4e4
rssi:-23

Devices Found:2/5
name:N/A
MAC:03f3e35771ce
rssi:-73

Devices Found:3/5
name:N/A
MAC:45797518112f
rssi:-71

Devices Found:4/5
name:N/A
MAC:53e4da7c288f
rssi:-82

Devices Found:5/5
name:PB02-LIGHT
MAC:bb02bbbbbb0d
rssi:-89

Description:

  • Different Bluetooth devices in your environment have different scanning responses.

3.Connecting slave

Command:

AT+BLECONNECT=a81710d8f4e4

Response:

OK
>

Response:

After ble is connected, it enters transparent mode by default. Any data received by the serial port is directly sent to the peer device. If you need to send other commands or receive data from other connections (such as tcp connections), exit the transparent mode first. The command to exit transparent transmission mode is +++ (without bringing back the car line feed). If you need to send ble data after exiting transparent transmission mode, you can use the command AT+BLESEND to send it.Or send the command AT+TRANSENTER to re-enter transparent transmission.

GIF presentation

Please click on the larger view. Left window host, right window slave

blecommunication link

BLE iBeacon

  1. Set Bluetooth iBeacon UUID (Optional, set before enabling iBeacon)

command :

AT+BLEIBCNUUID=00112233445566778899aabbccddeeff

Response:

OK

  1. Set Bluetooth iBeacon data (optional, set before enabling iBeacon)

command :

AT+BLEIBCNDATA=1122,3344,5566,14

Response:

OK

  1. Open iBeacon

command :

AT+BLEMODE=2

Response:

OK