YO Modbus
User guide
v2.1
page 5/33
Physical interfaces
LEDs
YO Modbus communicates its current behavior to the user by RGBW LED placed on the top of the
device shown on figure 1.
DIODE STATUES INTERPRETATION
BEHAVIOUR
COLOUR
DEVICE STATUS
Single flash
Green
General:
device is working correctly (power and memory).
Single flash
Red
General:
device is working incorrectly (power and memory).
LoRaWAN communication:
failed to receive an
acknowledgement from LoRaWAN Server within specified
timeout.
Single flash
White
LoRaWAN communication:
LoRaWAN packet sent \
confirmation from LoRaWAN Server after receiving the packet.
Slow flashing
Blue
BLE communication:
connection to the device via BLE
(configuration).
Rapid flashing
Blue
LoRaWAN communication:
connecting to LoRaWAN network.
Continuous lit
Orange
Term diode:
Terminating resistor connected.
Rapid flashing
RS485
Red
RX/TX diode:
RS485 packet sent
Green
RX/TX diode:
RS485 packet received
Buttons
YO Modbus is equipped with one reset button under the interference status diode RX/TX shown on
the device top view. It is possible to press it with a thin pin.