Features 1、Wind Direction Sensor: The all round 360 degree wind direction sensor comes with excellent linearity, high accuracy, no dead points, strong resistance, easy observation, and reliable stability. 2、Wind Direction Indicator Shell: Small rotational resistance, accurate measurement, small size, light weight, easy to carry and assemble. It has a simple design, but very practical in use, giving you a good using experience. 3、ABS Material: Made with a low inertia ABS wind vane, the sensor exhibits good dynamic characteristics and responds well to wind direction changes. Safe to use. Boasting wonderful performance and strong stability. 4、Working Principle: The wind direction sensor operates primarily by rotation. This working principle enables accurate measurements of the wind's direction. It can be used outdoors for a long time. 5、Wide Application: Ideal for meteorology, environmental monitoring, aviation, and aerospace. It aids in understanding wind conditions and implementing corresponding measures. Specifications Item Type: Wind Direction Sensor Material: ABS Product Size: Approx. 223x190x70mm/8.78x7.48x2.76in Gross Weight: Approx. 385.00g/13.6oz Power Supply Voltage: DC 5V Output: RS485 for Modbus Extension Cable Length: 0.8m/2.6ft Accuracy: Omni directional: ±3° Resolution: Omni directional: 1° Startup Wind Speed: ≤0.8m/s Maximum Power Consumption: 0.48W Load Capacity: DC 12V power supply, current output impedance ≤350Ω DC24V power supply, current output impedance ≤900Ω Voltage output impedance ≥1KΩ Operating Environment: Temperature -35℃ to 60℃ Humidity ≤100%RH non condensing Protecting Level: IP64 Cable Level: Rated voltage: 300V 80℃ Application: for garden, greenhouse, environmental protecting, meteorological station, ship, dock, aquaculture, advertising barrier, weather, marine, environment, airport, port, laboratory, agriculture and traffic environment wind direction measurement Installation Aperture: 3.2mm/0.13in Mating Plug Diameter: 15mm/0.59in (recommend reserving 25mm/0.98in for wiring, wire up first, then install and fix the sensor) Wiring Method: Red wire: power positive(voltage, current, pulse), power positive(RS485) Black wire: power negative(voltage, current, pulse), A+ (RS485) Yellow wire: signal (voltage, current, pulse), B- (RS485) Green wire: power negative(RS485) Standard for ModBus RTU communicating protocol : First, the serial port format: data bits 8 bits, stop bit 1 bit, parity bit none, default baud rate 9600bps, serial port software set to hex send and receive, two communicating intervals of at least 500ms or more, CRC in the manual for the parity bit, 2 bytes. Device address default address 2. Second, the communicating format 1. Write the device address (for example, write address 02) Send 00 06 00 20 00 02 08 10 Instruction Address Write Starting address New address CRC check Return 00 06 00 20 00 02 08 10 Instruction Address Write Starting address New address CRC check Return 01 86 ** ** then the configuration is not successful. 2. Read device address (e.g. read address 2) Send 00 03 00 20 00 01 84 11 Instruction Address Read Starting address Read Points CRC check Return 00 03 02 00 02 04 45 Instruction Address Read Data length Device data CRC check 3. Read register data (eg: read address 2 data) Send 02 03 00 00 00 01 84 39 Instruction Address Read Starting address Read Points CRC check Return 02 03 02 00 26 7D 9E Instruction Address Read Data length Device data CRC check Omnidirectional wind sensor returns data as 0x0026 converted to decimal as 38 , the wind direction value is 38 degrees, no decimal places. If it is an eight direction wind direction sensor, the return data refers to the table of eight direction calculation formula on page 1. 4. Read device communicating baud rate (for example: read address 2 of the device baud rate = 9600) Send 02 03 00 10 00 01 85 FC Instruction Address Read Starting address Read Points CRC check Return 02 03 02 00 02 7D 85 Instruction Address Read Data length Device data CRC check Baud rate = data x 4800. return data 0x0002, then baud rate = 4800x2 = 9600. 5. Write device communicating baud rate (for example, write baud rate 9600) Send 02 06 00 10 00 02 09 FD Instruction Address Read Starting address New baud rate CRC check Return 02 06 00 10 00 02 09 FD Instruction Address Read Starting address New baud rate CRC check Baud rate = data x 4800. write data 0x0002, then baud rate = 4800x2 = 9600. supported baud rates are 4800, 9600, 14400, 19200, 38400, 57600, 115200. if write other unsupported baud rate, it will be automatically restored to 9600 after reboot. Returning 01 86 **** means the configuration is not successful. 6. Switch the communicating protocol (e.g. switch to for ASCII private protocol). Send 02 06 00 14 00 03 89 FC Instruction Address Write Starting address 01 for MODBUS 03 for ASCII CRC check Return 02 06 00 14 00 03 89 FC Instruction Address Write Starting address Data CRC check If 01 86 **** is returned, the con