Peripheral Only Mode; Reasons To Use The Peripheral Only Mode; Restrictions - We PROTEUS-III User Manual

WIRELESS CONNECTIVITY & SENSORS
User manual Proteus-III

10. Peripheral only mode

The Proteus-III implements a new feature that allows the easy integration of the Proteus-III
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Bluetooth LE module to an already existing host. The peripheral only mode offers a plug and
play installation without previous configuration of the Proteus-III. It is tailored for easy commu-
nication with mobile Bluetooth
The peripheral only mode is a special operation mode, that uses the user settings and the pe-
ripheral functions of the normal mode described in the previous chapters. It has to be enabled
during the module start-up and contains the following key features:
• Peripheral only functions: The Proteus-III only contains the functions of a peripheral de-
vice. Thus, it is advertising until another Bluetooth
this case, the UART of the Proteus-III is enabled, the LED_2 pin shows that the channel is
open and bidirectional data transmission can start. As soon as the connection is closed,
the UART is disabled again to save power. Since all central functions are no longer valid,
the module cannot initiate any connection or run scans.
• Transparent UART interface: The serial interface of the Proteus-III is no longer driven by
commands. This means, when the UART of the module is enabled (i.e. only when a
channel is open, indicated by both LEDs active), data sent to the UART is transmitted
by the Proteus-III to the connected Bluetooth
data received by radio is sent from the Proteus-III to the connected host without additional
header Bytes. The UART is only running, when a channel is open. Thus, power is
saved during the advertising period. Depending on the configured connection interval,
only one packet per interval is allowed to be transmitted. Since the commands of the
command interface are no longer valid, a Proteus-III cannot be configured when running
in peripheral only mode.
• Pairing: The default security mode is the static passkey pairing method (see
RF_SecFlagsPerOnly ), with the default key "123123". The bonding feature is enabled by
default.

10.1. Reasons to use the peripheral only mode

The Proteus-III peripheral only mode equips custom applications with a Bluetooth
(to be accessible by other Bluetooth
To setup a connection to the Proteus-III in peripheral only mode the central device has to insert
the Proteus-III's static passkey. As soon as the channel to a connected Bluetooth
device is open, the LED_2 pin switches on to signalize that data can be exchanged now. When
the connection was shut down by the Bluetooth
again.
Due to the transparent UART interface, data can be exchanged without additional headers.
Furthermore, the peripheral only mode allows an energy efficient operation of the Bluetooth
interface, since the UART is only enabled when it is really used.

10.2. Restrictions

In peripheral only mode, it is not possible to use the security modes "Lesc pass key" and "Lesc
numeric comparison", as these security features require to output the LESC key on the UART.
Order code 2611011024000
Version 1.8 , July 2022
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LE devices like smart phones.
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LE devices) without installation effort.
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LE central device, the LED_2 pin switches off
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LE enabled device connects to it. In
LE enabled device. On the other hand, all
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LE interface
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LE central
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LE
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