User's Manual

All commands could be divided into five groups: Set/Get commands, Action

commands, characteristic access commands, private service configuration

commands and Microchip MLDP commands.

3.2.1 Set/Get commands

This group of commands is used to configure the functionality of RN4020 module.

The set command starts with letter ‘S’ and follow by one or two letters as the

command identifier. The set command parameter is mandatory and it is separated

from the command by comma. The format of set command could be seen in Figure 1.

Figure 1: Set Command Format

Command Identifier

Input Parameter

It is highly desirable to perform a reboot after the set command so the new settings

could be effective afterwards. All configurations from Set command will be stored in

the NVM of RN4020 module and restored after powering cycle or reset. All set

command has corresponding get command to output the configurations to the

UART. Get command has the same command identifier as set command but no

parameters.

3.2.1.1 S-,<string>

This command sets the serialized friendly name of the device, where <string> is up

to 15 alphanumeric characters. This command automatically appends the last 2

bytes of the Bluetooth MAC address to the name, which is useful for generating a

custom name with unique numbering.

Default: N/A

Example: S-,MyDevice // Set device name to “MyDevice-ABCD”

3.2.1.2 S@,<0-2>,<hex16>

This command set the analogue port output voltage. There are two parameters for

this command. The first parameter could be 0, 1 or 2, specifying the analogue port

number. The second parameter is the output voltage in mV. Notice the range of

output voltage is between 0 – 1.3V. When outputting analogue signal, RN4020 could

not be run under deep sleep mode. Instead, the firmware will automatically adjust

the operation mode to shallow sleep. Once analogue output is turned off by issuing

command “S@,<0-2>,0000”, the firmware will again automatically adjust the

operation mode back to deep sleep when available.

Example: S@,1,03E8 // Set AIO1 output voltage to be 1000mV