Wind Speed Direction Sensor 0‑2.5V Signal Output 3 Cups S Type Integrated Anemometer Transmitter DC5V Item Type: Wind Speed Direction Sensor Product Size: Approx. 458 x 232mm / 18 x 9.1in Material: ABS, Aluminum Alloy Measurement Object: Wind Speed, Wind Direction Signal Output: 0-2.5V Measurement Range: Wind Speed 0-45m/s Cable Length: Approx. 5.2m / 17.1ft Accuracy: Wind Speed: ±(0.3+0.03V)m/s, Wind Direction: ±3° Resolution: Wind Speed: 0.1m/s, Wind Direction: 1° Starting Wind Speed: ≤0.5m/s Maximum Power Consumption: 0.9W Operating Environment: Temperature -35℃-60℃, Humidity ≤100%RH non condensing Guard Level: IP64 Application: Meteorology, Marine, Environment, Airport, Port, Laboratory, Industrial and Agricultural, and Transportation Calculation Formulas: 0-2.5V: F=V/2.5 x A+B F: Indicates the wind speed or direction sensor value, m/s or° A: Sensor range width (upper range minus lower range) B: Minimum value of sensor range (lower limit of range) 4 Installation Methods: 1. Horizontal Bottom Mounting, Wind Direction Must Face Upward 2. Horizontal Top Mounting, Wind Direction Must Face Upward 3. Vertical Side Mounting, Wind Direction Must Face Upward 4. Pole Mounting, Wind Direction Must Face Upward Wire Connection Method: Red Wire: Power Positive Pole Green Wire: Power Negative Pole and Signal Ground White Wire: Wind Speed Signal Blue Wire: Wind Direction Signal Standard Comm Protocol: Serial Port Format: 8 data bits, 1 stop bit, no parity, default baud rate 9600bps, serial debugging software set to hex send and receive, minimum interval between two comms at least 500ms, CRC in the manual is the parity, 2 bytes. Default device address is 1 CRC Check Steps: 1. The preset 16 bit register is hexadecimal FFFF, is called CRC register; 2. The first 8 bit data is different from the lower part of the CRC register or put the result in the CRC register; 3. Move the contents of the register to the right one bit (towards the low), fill the highest bit with 0, and check the lowest bit; 4. If the lowest position is 0: repeat step 3 (shift again) If the lowest position is 1: the CRC register is XOR with polynomial A001 (1010 0000 0000 0001); 5. Repeat steps 3 and 4 until you move to the right 8 times, so that the entire 8 bit data has been processed; 6. Repeat Step 2 to Step 5 to process the next 8 bit data. The resulting CRC register is the CRC code (the resulting CRC code is low before high after). Troubleshooting: 1. Wind blade rotation is not good, hysteresis is large. Due to long-term use, there are foreign bodies or stuck in the bearing. 2. When analog signal or RS232, RS485 output, the instrument display value is incorrect. The correct data cannot be obtained because the cable connection is faulty or the comm serial port is faulty. Check whether the cable connection is correct and secure, whether the serial port is occupied, and whether the serial port Settings are correct.