RUI3-RS485-Wind-Sensor

Example for a RS485 wind sensor using RAKwireless RUI3 on a RAK3172.

Works with the Rika RK900-09 sensor.

Components

Rika RK900-09 Wind Sensor

Rika RK900-09 datasheet

Sensor works by default with 9600 Baud

Rika RK900-09 Wind Sensor register setup

WisBlock modules & enclosure

• RAK3172 Evaluation Board with
  • RAK19007 WisBlock Base Board
  • RAK3372 WisBlock Core module with STM32WLE5
• RAK5802-M WisBlock RS485 module (modified variant)
• RAK19002 WisBlock 12V booster for supply of RS485 sensor (max 12V / 80mA)
• Unify Enclosure 150x100x45

Assembly

Assembly is done with the "standard" mounting plate of the Unify Enclosure.
Sensor connection is done with the 5-pin IP65 connector of the Unify Enclosure. Antenna used is Blade Antenna with 2.3 dBi gain.

IMPORTANT

RAK19002 12V booster must be installed in the Sensor Slot B

INFO

A permanent power supply will be required due to the power consumption of the Wind Sensor. This is not yet implemented in the setup.

Modbus Wiring diagram

Firmware

Firmware is based on RUI3-RAK5802-Modbus-Master with adjustements for the used RS485 sensor.

Custom AT commands

Send interval of the sensor values can be set with a custom AT command. Interval time is set in seconds

ATC+SENDINT? Command definition

ATC+SENDINT,: Set/Get the interval sending time values in seconds 0 = off, max 2,147,483 seconds
OK

ATC+SENDINT=? Get current send interval in seconds

ATC+SENDINT=3600
OK

ATC+SENDINT=3600 Get current send interval to 3600 seconds == 1 hour

ATC+SENDINT=3600
OK

LoRa® is a registered trademark or service mark of Semtech Corporation or its affiliates.

LoRaWAN® is a licensed mark.