4.2.
LED Indicators
4.2.1.
Normal operation
The I2C/UART Backboard has three built-in LEDs behind the yellow case to visualize
feedback of the sensor status. Table 7 lists the functionality of each LED of the I2C/UART
backboard.
Table 7 - LED indicators of the I2C/UART backboard
LED
Description
PWR (orange)
Power indicator, constantly ON when 5V is supplied
Rx (red)
Tx (green)
I2C/UART receive and transmit indicators.
Single blink for each data received or sent
4.2.2.
Troubleshooting
Table 8 - I2C/UART backboard LEDs troubleshooting
LED
designator
Sequence
Signification
Corrective actions
RED
Continuous
blinking
Sensor has detected a fault
and has stopped functioning
Check that the sensor is
properly connected to
the backboard,
then restart the sensor
RED /
GREEN
Both LEDs
blinking
continuously
Sensor has detected a fault
in the sensor initialization
process
Check I2C/UART output
for details of the error
Verify that the sensor is
properly connected and
restart
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