User's Manual

Command “U” not only removes the bonding, but also changes advertisement
method. If a peripheral is advertising when command “U” is issued, RN4020 will
remove the bonding, stop the directed advertisement, and then start undirected
advertisement.
Example: U // remove existing bond
3.3.2.15 V
Command “V” displays the firmware version.
Example: V // display firmware version
3.3.2.16 X
Command “X” is only available to central or observer device. For central device, it
stops inquiry process. For observers, it stops to receive broadcast messages.
Command “X” expects no parameter.
Example: X // stop inquiry
3.3.2.17 Y
Command “Y” is only available to peripheral or broadcaster device. It stops
advertisement that starts by command “A”. Command “Y” expects no parameter.
Example: Y // stop advertisement.
3.3.2.18 Z
Command “Z” is only available to central device. It stops connection process that
starts with command “E”. Command “Z” expects no parameter.
Example: Z // stop connection process
3.3.3 Characteristic Access Commands
The main functionality of BTLE profiles and services are providing access to the
values and configurations of characteristics. RN4020 provides a group of commands
to address this issue.