5.10. Connection setup using LE Coded phy
Due to backward compatibility reasons the Bluetooth
®
LE standard expects to setup a
Bluetooth
®
connection in the 1 MBit legacy mode and then to update the connection to
long range mode, if requested. Thus, at connection setup time the distance between the two
Bluetooth
®
LE devices must be within the standard range.
To avoid this situation, the Proteus-III allows to setup a connection directly in long range
mode. To enable this feature, set the corresponding bit in the user setting
As soon as this feature is enabled, the Proteus-III sends only advertising packets in long
range mode. Furthermore, when scanning, only advertising packets in long range mode are
received. Thus only devices using this special mode can be found on the radio.
The Proteus-III advertises and scans in long range mode and thus is radio
incompatible to Bluetooth
®
LE devices acting in legacy 1 Mbit mode. Using
this feature, all Bluetooth
®
LE enabled devices, like smart phones, do not find
the Proteus-III on radio as they are scanning in legacy 1 Mbit mode, by default.
Example: Configure the device for long range connection setup
The goal of this example is to demonstrate how to configure two Proteus-III radio module
to be able to setup connections in long range mode. Further, a connection setup and data
transmission is shown.
1. Power-up the modules and make their UARTs accessible by the host(s) (115200 Baud,
8n1). After the power-up or after reset the following sequence is sent from the module
to the host.
Info
Module A
Module B
⇐
Response
: Module A
started in
ACTION_IDLE
mode.
02 41 02 00 01 01 41
⇐
Response
: Module B
started in
ACTION_IDLE
mode.
02 41 02 00 01 01 41
2. Request the
of both modules.
Info
Module A
Module B
⇒
Request
with settings index 4
02 10 01 00 04 17
⇐
Response
of
module A is
0x55 0x00 0x00 0xDA 0x18 0x00
02 50 07 00 00
55 00
00 DA 18 00
C2
⇒
Request
with settings index 4
02 10 01 00 04 17
⇐
Response
of
module B is
0x11 0x00 0x00 0xDA 0x18 0x00
02 50 07 00 00
11 00
00 DA 18 00
86
3. Configure the parameter
to use "Long range connection mode".
Proteus-III reference manual version 1.3
© August 2020
www.we-online.com/wireless-connectivity
58