User's Manual

Class 1 Bluetooth v2.0 Module
User’s Guide
Americas: [phone] Option 2
Europe: [phone]
Hong Kong: [phone]
www.lairdtech.com/bluetooth
55
CONN-GUIDE-BT730_v0.9
6.10.2 Pulse a GPIO pin
To flash a GPIO pin, set it as an output using S reg 610 and then use S reg 585 to 587 inclusive to set the
pin, period, and duty cycle respectively.
6.10.3 Flash LED on Connectable Mode
S reg 534 now takes a value up to two. A value of two configures it so that it blinks when the module is in
connectable mode.
6.10.4 Reset via BREAK
The module can be reset by sending a BREAK signal. A BREAK signal exists when the module’s
UART_RX input is in a non-idle state (0v) for more than 125 milliseconds.
6.10.5 Digital I/O Cable Replacement
The module has a number of general purpose digital I/O pins. The direction of these is specified via S
Reg 610.
When S Reg 531 is set to four at both ends of the connection, on connection, any changes in the states
of the inputs at one end are transmitted to the peer, which then reflects those states on the appropriate
I/O pins if they have been configured as outputs.
It is recommended that the value of S Reg 610 at one end be the complement of the other end. That way,
inputs at one end are mirrored at the other end and vice versa.
In addition S Reg 506 must be set to zero, which disables echoes.
Note: Due to inherent latency of Bluetooth transmission, expect the change of state to be
delayed. This value is typically 100 ms and can be much more if the quality of the link is
bad which results in many retries.
It is assumed that an audio channel is not active at any time.
6.10.6 Append Bluetooth Address to Friendly name
If S Reg 593 is set to one, then the last six hex digits of the Bluetooth address are automatically
appended to the friendly name. This allows multiple devices with the same name in a neighbourhood to
be differentiated.
6.11 Disclaimers
LAIRD WIRELESS PRODUCTS ARE NOT AUTHORISED FOR USE AS CRITICAL COMPONENTS IN
LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE
MANAGING DIRECTOR OF LAIRD TECHNOLOGIES LTD.
The definitions used herein are:
a) Life support devices or systems are devices which (1) are intended for surgical implant into the
body, or (2) support or sustain life and whose failure to perform when properly used in
accordance with the instructions for use provided in the labelling can reasonably be expected to
result in a significant injury to the user.