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1.3.4 Bluetooth dongle
The Bluetooth dongle, which is available as an optional accessory (art. no. 9330D), is a Class-1 module and
communicates on a frequency of 2.4 GHz. The Bluetooth dongle (subsequently referred to as “module“) is
compatible with Bluetooth specification 1.2 and capable of communicating with the laptops supplied by
F.A.S.T., which are als equipped with a Bluetooth module.
The graphic below show the upper and the lower side of the module and its control and indication elements.
Point 1
in the graphic shows the green status LED, which indicates the status of the module. When the
module is being configurated, the green LED flashes 10 times per second. When the module is searching for
another device or when it is idle, the green LED flashes just once per second. If a connection could be
established, the green LED is lit permanently. The orange LED as shown under
point 2
indicates the
status of the communication connection, i.e. if data is being transmitted or received, the orange LED starts
flashing.
Illustration 1-9: Bluetooth dongle
Point 3
in Illustration 1-9 shows the jack for external power supply. In general, 4 - 9 volts DC can be
applied to this jack. Please make sure that the positive voltage has been applied to the central pin of the jack,
and earth has been applied to the outside. If the power supply is 5 volts, the module requires a maximum of
300mA. If, however, you do not operate the module in combination with a F.A.S.T. correlator, the module
has to be supplied with power through the RS-232 connector (see also Illustration 1-9,
point 4
), i.e. no
external power supply is required.
Additional parameters of the module can be changed through the Dip switches (
point 5 - point 8
).
The switch marked with
point 5
is to change the transmission rate (baud rate). The module allows
transmission rates of 115,200 baud and 9,600 baud. If the switch is switched to the left position, i.e. to
ON
,
9,600 baud are used for data transmission. If the switch is set to the right position, as can be seen in
Illustration 1-9, a baud rate of 115,200 is applied. The 115,200 baud rate is the standard recommended by
F.A.S.T. and should be applied. The communication parameters
data bits
,
stop bits
and
parity
cannot be changed. The module uses 8 data bits, 1 stop bit, and no parity as communication parameters for a
connection.
