RN4677 datasheet(27/31 Pages) MICROCHIP

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Command Reference

 2015 Microchip Technology Inc.

DS50002377A-page 27

The first parameter is an 8-bit hex value for scan time in of seconds.

The second parameter is a 16-bit hex value for scan interval in the unit of 0.625 ms.

The third parameter is a 16-bit hex value for scan window in the unit of 0.625 ms. This

parameter must be less than or equal to the second parameter.

If parameters are not provided, the default scan time is 8 seconds, scan interval is 230

ms and scan window is 125 ms.

Example:

2.5.16

IN<value 1>,<value 2>

This command only applies to Bluetooth Classic.

This command is similar to the I command, but it does not return the Bluetooth name,

where <value 1> is the scan time in seconds and <value 2> is the optional COD of the

device class being scanned.

Example:

2.5.17 IQ

This command only applies to Bluetooth Classic.

This command scans for Bluetooth devices in Pairing mode and returns the Received

Signal Strength Indicator (RSSI), which is an indicator of the signal quality for remote

devices. Inquiry scanning with RSSI is part of the Bluetooth specification where the TX

power is held at a constant level (no power control) while sampling the RSSI. A useful

application for RSSI scanning is proximity-based pairing.

Example:

2.5.18

IS<value>

This command only applies to Bluetooth Classic.

This command performs an inquiry scan with a COD of 0x001F00, which is the default

COD for Microchip Bluetooth Classic RN modules, where <value> is the scan time in

seconds.

Example:

2.5.19

IR<value>

This command only applies to Bluetooth Classic.

This command performs an inquiry scan with a COD of 0x0055AA, where <value> is

the scan time in seconds. Microchip Bluetooth Classic RN modules use this COD for

instant cable replacement.

Example:

IL,10,0320,0190

// Scan BLE peripherals for 16 seconds with

// scan interval 500 ms and scan window 250 ms

IN10,001F00

// Scan for 10 seconds using the COD 0x1F00

IS10

// Scan for Microchip Bluetooth Classic RN devices for 10 s

IR10

// Scan for instant cable replacement devices for 10s

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