UART Non-contact Optical Turbidity Sensor for Arduino (แท้ DFRobot)

• No mechanically moving parts, high reliability
• Small size & low cost

• Water quality monitoring system

• Supply Voltage: 5V
• Communication Mode: UART-TTL
• Applicable Cylinder Container Diameter: 40 to 50mm
• Baud Rate: 9600
• Operating Current: less than 10mA
• Response Time: less than 1s
• Operating Temperature: 5 to 60℃
• Storage Temperature: 0 to 65℃
• Service Life: 50000h

• Product wiki

• Turbidity Sensor × 1
• Gravity: 4Pin Sensor Adapter × 1

Communication Protocol

Connection Diagram

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

Sensor Wiring Sequence Definition

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.

Installation

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

Tutorial

Hardware

• DFRduino UNO R3 (or similar) × 1
• Turbidity Sensor × 1
• Gravity: 4Pin Sensor Adapter × 1
• Micro USB Cable × 1
• Gravity-4P Cable (PH2.0 to 2.54 DuPont female) × 1

Software

• Arduino IDE

Sample Code

#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX
unsigned char str[5] = { }; //Serial receives data
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) //Detect if there is data on serial port
{
for (int i = 0; i < 5; i++)
{
str[i]=mySerial.read();
delay(5);
}
Serial.println(str[3],DEC);
mySerial.flush();
}
delay(500);
}