CHAPTER 29 CLICK 421 247
mounted on the exterior of the trac cabinet or up on a pole for maximum range. A whip
antenna can also be used inside the cabinet. If the antenna is installed inside a metal cabi-
net, the range will be diminished.
Configuration Features
e other three LEDs are activity indicators.
PWR (red) lights up when the device has power.
Bluetooth Link (blue) lights up when a link is successfully made over Bluetooth to an
external device.
TD (green) lights up when the device is transmitting data.
RD (yellow) lights up when the device is receiving data.
e LEDs are also used to indicate operation modes, which will be discussed later in the
On-device Conguration section of this chapter.
e front also has a push-button labeled Mode Switch, which is used to cycle the Click 421
through operation modes. is will be discussed later in the On-device Conguration sec-
tion.
On-device Configuration
e Click 421 can be congured using the push-button on the lower part of the faceplate.
Press and hold the push-button to cycle through the dierent operation modes; release the
button when the desired mode is reached. A quick press and release of the push-button will
exit out of any mode and return the unit back to normal operation. Table 28.1 and the fol-
lowing sections describe the dierent operating modes.
Mode LED Definition
Autobaud Green (solid) To autobaud the Click 421, press the push-button, then
release when the green LED turns on. The Click 421 is
autobauding when the green LED is on and the red LED
is blinking.
Link Test (Server) Blue (flashing) To set the Click 421 in Link Test mode as a server, press
the push-button, then release when the blue LED is
blinking. The Click 421 is transmitting data if the red LED
comes on and the green LED blinks.
Reset Red (flashing) To reset the Click 421 to factory defaults, press the push-
button, then release when the red LED is blinking.
Table 28.1 – Click 421 Operation Mode Definitions
Autobaud (green solid)
e Autobaud mode is used to match baud rates with an external device. By default, the
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