IP68 Underwater Ultrasonic Obstacle Avoidance Sensor (3m, UART) - แท้ DFRobot

ดูรายละเอียดการใช้งานและตัวอย่าง arduino code ได้ที่ Click

Introduction

This is an underwater ultrasonic obstacle avoidance sensor specifically designed for underwater applications. It operates on a wide voltage range of 5-24V and features compact size, minimal blind spots, high precision, and high protection. Its underwater measurement range is from 2-300cm.

Specification

• Measurement Range: 2-300cm
• Measurement Accuracy: ±(0.5+S*0.5%)cm@＜2m, ±(1+S*1%)cm@＞2m
• Operating Voltage: 5-24V
• Standby Current: ≤1mA
• Operating Current: ≤10mA
• Output Mode: UART controlled
• Power-on Startup Time: ≤500ms
• Output Response Time: 10ms
• Angle: 5-10°
• Operating Temperature: -15~50°C
• Storage Temperature: -25~80°C
• Storage Humidity: 65%~90% RH (non-condensing)

Features

• Compact in size, with a small blind zone
• Lightweight and fast response time
• Waterproof level of IP68

Document:

• Product Wiki

Shipping List:

• Underwater Ultrasonic Obstacle Avoidance Sensor (3m) x1

Applications

• Underwater robot obstacle avoidance and self-control detection
• Measurement of water depth by underwater robots

Board Overview

Dimensional Drawing

Output Format

1、communication instructions

2、Timing diagram

Note: T1 ≥ 19ms; T2 ≈ 13ms

3、UART output format

SUM= (header+Data_H+ Data_L)&0x00FF

=(0XFF + 0X07 + 0XA1)&0x00FF

=0XA7；

Distance value = DATA_ H * 256+DATA_L = 0x07A1;

Decimal conversion is equal to 1953;

Tutorial

Requirements

• Hardware
  • DFRduino UNO R3 (or similar) x 1
  • Ultrasonic Ranging Sensor(3m) x1

• Software
  • Arduino IDE

Connection Diagram

Note: the sensor needs to be put into water to get data, otherwise the output distance value is 0

Sample Code

#include <SoftwareSerial.h>
unsigned char buffer_RTT[4] = {0};
uint8_t CS;
#define COM 0x55
SoftwareSerial mySerial(7, 8);
void setup() {
Serial.begin(115200);
mySerial.begin(115200);
}
void loop() {
mySerial.write(COM);
delay(100);
if(mySerial.available() > 0){
delay(4);
if(mySerial.read() == 0xff){
buffer_RTT[0] = 0xff;
for (int i=1; i<4; i++){
buffer_RTT[i] = mySerial.read();
}
CS = buffer_RTT[0] + buffer_RTT[1]+ buffer_RTT[2];
if(buffer_RTT[3] == CS) {
Distance = (buffer_RTT[1] << 8) + buffer_RTT[2];
Serial.print("Distance:");
Serial.print(Distance);
Serial.println("mm");
}
}
}
}

Results: Put the sensor into the water, and if there is an obstacle in front, the distance between the sensor and the obstacle will be printed by serial port.