Wind Speed Sensor

Technical parameter

• Range : 0-30m/s
• Accuracy : ±1m/s
• Output Singal : RS485
• Power consumption : ＜1W
• Response time : ＜5s
• Baud rate : 2400/4800/9600
• Operating temperature : -30°C~80°C
• Working Humidity : 0-100%RH
• Start wind power : 0.2-0.4m/s

Interface Description

          Before you wiring and use, please read this article in detail, Improper use may result in irreversible damage to the product.

Communication protocol

#include <ModbusMaster.h> //https://www.arduinolibraries.infoModbusMaster/libraries/modbus-master
#include <SoftwareSerial.h> //https://github.com/PaulStoffregen/SoftwareSerial
#define TXD 4 // your software serial TXD pin
#define RXD 3 // your software serial RXD pin
#define slaveID 1 //Address ID

SoftwareSerial mySerial(RXD, TXD);
ModbusMaster node;

void setup() {
Serial.begin(9600); // config baudrate modbus
mySerial.begin(9600); //serial mornitor

}

void loop() {
get_WINDSPD_485();

}

int get_modbusRTU_sensor(int addr , uint16_t REG) {
int result;
node.begin(addr, mySerial);
//result = node.readInputRegisters (REG, 2); ///< Modbus function 0x04 Read Input Registers
result = node.readHoldingRegisters (REG, 2);
if (result == node.ku8MBSuccess) {
return node.getResponseBuffer(0);
} else {
//Serial.print("Connec modbus fail. REG >>> "); mySerial.println(REG, HEX); // Debug
return -270;
}
}

/************************WINDSPD-485**************************/
void get_WINDSPD_485() {

#define WindSpeed 0 //Register Address 0000H

int wind_Speed //ประกาศตัว ตแปลแ แบบทดศนิยม
wind_Speed = get_modbusRTU_sensor(slaveID, WindSpeed) / 10;
delay(1000);
Serial.print("Wind Speed value = ");
Serial.print(wind_Speed, 1);
Serial.print("m/s");

}