Micro CAN module LED functionality

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Multi color status LED Function on the micro CAN

LED Function Description
4 flashes The LED will flash 4 times every 15 seconds (and when booting) to indicate status:

Flash 1: Indicates CAN bus status (BLUE: Communication with CAN Control Module OK || RED: No communication detected)

Flash 2: Indicates the status of the external combined temperature/humidity I2C sensor (GREEN: External I2C temp/humidity sensor OK and used || RED: No external I2C temp/humidity sensor found)

Flash 3: Indicates the status of the temperature sensor (DS1820) connected on the first output OR the status of the external temperature/humidity sensor (GREEN: sensor OK || RED: Error or no sensor connected)

Flash 4: Indicates the status of the temperature sensor (DS1820) connected on the second output.

GREEN flash When a switch is pressed, the LED flashes GREEN
GREEN dim/on/off When the instruction "input indicate" is used and an input of this micro CAN is selected
BLUE dim/on/off When the instruction "sensor indicate" is used and a sensor (onboard sensor, temperature/humidity sensor or DS1820 on Output 1) of this micro CAN is selected
PINK dim/on/off When the instruction "sensor indicate" is used and a sensor (DS1820 on Output 2) of this micro CAN is selected
RED flash Short circuit or overcurrent is detected on the 5VDC output

Some remarks:

  • It can take up to 2 minutes before a connected sensor is found.
  • You can connect either a combined Temp/humidity I2C sensor, or 1 or 2 DS1820 sensors which means that LED indication is green for the I2C sensor or green for the DS1820.