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Manual baud rate configuration uses a task instead of an operating mode. This means that as soon as the baud
rate has been chosen, the Click 510 will return to the previous operating mode. For example, if you were using the
Click 510 to perform a latency test then manually set the baud rate, the device would return to Latency Test mode
after the baud rate is set.
The yellow submenu LEDs cycle through the eight possible baud rates, first by glowing solid and then by flashing, as
shown in Table 7.4. Once you’ve reached the desired baud rate, press the push-button once. By default, the device
is set to 9600 bps, so when you enter this mode the cycle will start on 9600 bps with the fourth LED glowing solid.
1st LED
2nd LED
3rd LED
4th LED
Yellow LEDs solid
1200 bps
2400 bps
4800 bps
9600 bps
Yellow LEDs flashing
19200 bps
38400 bps
57600 bps
115200 bps
Note.
The minimum baud rate supported by many Click and SmartSensor modules is 9600 bps. The maximum
baud rate supported by many Click modules is 57600 bps.
Autobaud
Automatic baud rate discovery is the fourth option presented in the menu selection process, shown by the green
LED turning on solid. Automatic baud rate configuration is a task, not an operating mode. This means that as soon as
the discovery process finishes, the Click 510 will return to the previous operating mode. For example, if you were use
the Click 510 to perform a latency test, the device would return to Latency Test mode after the autobaud process.
If the discovery process is successful, all the submenu LEDs (yellow and red) will turn on together for 1 second,
before returning to the prior mode of operation. This signals that the baud rate has been set to match the sensor.
The discovery process attempts all the baud rates listed in the figure above. SmartSensor V autobaud discovery
requests are sent at each baud rate. If a response to a request is received, the Click 510 baud rate will be set
to match the SmartSensor baud rate. Each baud rate is attempted 10 times with a longer wait time on each
successive iteration. During the discovery process, the red and green system LEDs will be illuminated (the green
LED will flicker when serial transmit activity occurs).
If the discovery process is not successful, the baud rate of the Click 510 will remain the same and the device will
return to the previous mode of operation. The entire process may take up to 1.5 minutes if unsuccessful.
Latency Test
Latency Test mode is the fifth option presented in the menu selection process. This test is performed to measure
the time it takes data packets to travel across your communication channel. When you first enter the latency test
mode, the results from the last latency test will be displayed as a series of submenu LED combinations that flash in
a repeating sequence.
Before your start the test, make sure that both devices are in the Latency Test operation mode (with the results
from the last test displayed as a repeating sequence). Then, to start a test, press the push-button on one of the
Click 510 devices.
While a test is initializing the entire row of red LEDs will flash on. As the test proceeds, the entire row of red LEDs
will be illuminated along with one of the yellow LEDs. Each yellow LED represents the data packet size being
sent across the communication channel. The data packet sizes are 16, 32, 64 and 128 bytes. The latency test will
send each of these packets sizes in order and determine the delay time of the communication channel. The figure
below shows what your submenu LEDs should show during the latency test.
