RN4677 datasheet(24/31 Pages) MICROCHIP

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RN4677 Bluetooth® 4.0 Dual Mode Module User’s Guide

DS50002377A-page 24

 2015 Microchip Technology Inc.

2.5

ACTION COMMANDS

Action commands perform actions such as inquiries, connecting, and entering/exiting

Command mode. Action commands do not return AOK.

2.5.1

$$$

This command causes the device to enter Command mode and display command

prompt. The device passes characters as data until it sees this exact sequence.

The escape character to enter Command mode can be changed with the S$ command.

Example:

2.5.2

---

This command causes the device to exit Command mode, displaying END.

Example:

2.5.3

This command toggles the local echo on and off. If the + command is sent in Command

mode, all typed characters are echoed to the output. Typing + a second time turns local

echo off.

Default:

Off

Example:

2.5.4

A[,<H16>,<H16>]

This command only applies to BLE.

This command starts the advertisement. Optionally, it can take up to two parameters.

The first parameter is the 16-bit hex value of the advertisement interval with the unit of

0.625 ms.

The second parameter is the 16-bit hex value of the advertisement lasting time with the

unit of millisecond. After this time, the advertisement stops. If the second parameter is

not set but the first parameter is set, advertisement starts with interval of the parameter

1 until a connection is established.

If no parameter is given, the advertisement starts with an interval of 20 ms for 10s and

then increase the advertisement interval to 160 ms to save power.

Example:

2.5.5

This command only applies to BLE.

Command B is used to secure the connection and bond two connected devices.

Command B is only effective if the two devices are already connected. Bonding can be

issued from either the central or the peripheral device.

Once bonded, security materials are saved in both end of the connection. Therefore,

reconnection between bonded devices does not require authentication as reconnection

can be done in a very short time.

$$$

// Enter Command mode

---

// Exit Command mode

// Turn local echo on

A,0040,03E8

// Advertise with interval of 40 ms for 1 second

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