How To Use The Peripheral Only Mode; More Information; Radio; Uart - We PROTEUS-III User Manual

WIRELESS CONNECTIVITY & SENSORS
User manual Proteus-III

10.3. How to use the peripheral only mode

The peripheral only mode is enabled, when a high signal is present on the MODE_1 pin during
device start-up or reset.
No configuration of the module is needed for this operating mode. The module shall be set
to factory settings if reconfigured before so it uses the default user settings. In this case, the
UART uses 115200 Baud 8n1 and static passkey pairing is used as authentication method.
If a configuration of the module is still needed (e.g. when another UART baud rate needs
to be chosen), the module has to be started in normal mode and the CMD_SET_REQ may be
used to update the user settings.
It is permitted to modify any user setting to change the behavior of the peripheral only mode.
Nevertheless, we recommend to update only the following parameters to run the device in
factory state with minimal adaptions:
• UART_ConfigIndex (change the UART baud rate, default value "115200")
• RF_StaticPasskey (change the default static passkey, default value "123123")
• RF_AdvertisingFlags and RF_DeviceName (determine the content of the advertising packet)

10.4. More information

10.4.1. Radio

In factory state the following holds.
• In peripheral only mode a new 8-digit device name is automatically generated by the FS_
BTMAC . In case of the FS_BTMAC equals 0x0018DA123456 the device name is "A-123456".
This is a workaround for iOS, which does not allow access to the BTMAC for received
®
Bluetooth frames.
• The content of the advertising packet was changed in peripheral only mode. The TX
power information block was removed, as the device name was extended to 8 digits.
See also the user setting RF_AdvertisingFlags to adapt the content of the advertising packet.

10.4.2. UART

• The data sent to the UART is buffered in the Proteus-III up to a maximum payload of
1015 Bytes. When no new Byte was received for 20ms, the data will be transmitted by
radio to the connected Bluetooth
connection, the data is sent via radio in several packets, with one packet per connection
interval.
• To enable a fast transmission of data packets a large MTU of the Bluetooth
tion is helpful. The Proteus-III supports up to 243 Bytes Bluetooth
(corresponding to a MTU of 247 Bytes), which may be negotiated by the central device
(using a MTU request). If no MTU request is requested by the connecting central device
the value of 19 Bytes payload per Bluetooth
by the Bluetooth
Order code 2611011024000
Version 1.8 , July 2022
®
LE device. If the data is larger than the MTU of the
®
4.0 standard is used (compatibility mode to Bluetooth
®
LE packet and connection interval as given
www.we-online.com/wcs
®
LE connec-
®
LE packet payload
®
LE 4.0 devices).
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