Example Code for Arduino-Read Turbidity Data

Introduction

This example demonstrates how to read and print the current turbidity value via serial port on a Uno R3.

Hardware Preparation

• DFRduino UNO R3 (or similar) × 1
• Turbidity Sensor × 1
• [Gravity: 4Pin Sensor Adapter] (https://www.dfrobot.com/product-1626.html)× 1
• Micro USB Cable × 1
• Gravity-4P Cable (PH2.0 to 2.54 DuPont female) × 1

Software Preparation

• Arduino IDE

Wiring Diagram

The sensor communicates with MCU via TTL and transmits the data through serial port after detecting different turbidity data.

Black=GND Blue=TX Red=VCC White=RX

Recommended connection diagram

Here we connect the sensor to the UNO board using Gravity: 4Pin Sensor Adapter and Gravity-4P Cable (PH2.0 to 2.54 DuPont female). The connections are as shown in the table below.

Other Preparation Work

The two probes should be oppositely fixed on a transparent container.

Sample Code

#include <SoftwareSerial.h>
SoftwareSerial mySerial(6, 7); // RX, TX
unsigned char str[5] = { }; //串口接收数据
unsigned char col;
unsigned int distance = 0;
unsigned char a[5] = {
  0x18,0x05, 0x00, 0x01 ,0x0D
};
void setup()
{
  Serial.begin(9600);
  mySerial.begin(9600);
}
void loop() {
  mySerial.write(a, 5);
  while (!mySerial.available());
  while (mySerial.available() > 0) //检测是否有串口数据
  {
      for (int i = 0; i < 5; i++)
      {
        str[i]=mySerial.read();
        delay(5);
      }
      Serial.println(str[3],DEC);
      mySerial.flush();
  } 
  delay(500);
}

Result

This example demonstrates how to read and print the current turbidity value via serial port on a Uno R3.