How to Use SH-U09C5: Examples, Pinouts, and Specs

The SH-U09C5 is a compact, high-performance ultrasonic sensor module manufactured by DSD TECH. It is designed for accurate distance measurement and object detection. The module operates by emitting ultrasonic waves and calculating the time taken for the echo to return, allowing it to determine the distance to an object. Its reliability and precision make it ideal for a wide range of applications, including robotics, automation, obstacle detection, and smart systems.

• Obstacle detection in robotics
• Distance measurement in automation systems
• Smart parking systems
• Liquid level sensing
• Security and surveillance systems

The SH-U09C5 ultrasonic sensor module is designed for ease of use and high performance. Below are its key technical details:

The SH-U09C5 module has a 4-pin interface for easy integration into circuits. Below is the pinout description:

The SH-U09C5 ultrasonic sensor is straightforward to use in a circuit. Follow the steps below to integrate and operate the module:

1. Connect the VCC pin to a 5V DC power supply.
2. Connect the GND pin to the ground of your circuit.
3. Connect the TRIG pin to a digital output pin of your microcontroller (e.g., Arduino).
4. Connect the ECHO pin to a digital input pin of your microcontroller.

• Ensure the sensor is mounted securely and is not obstructed by nearby objects.
• Avoid placing the sensor in environments with excessive noise or vibrations, as this may affect accuracy.
• The sensor should be used in a temperature range of -15°C to 70°C for optimal performance.

Below is an example Arduino sketch to use the SH-U09C5 for distance measurement:

// Define pins for the SH-U09C5 ultrasonic sensor
const int trigPin = 9; // TRIG pin connected to digital pin 9
const int echoPin = 10; // ECHO pin connected to digital pin 10

void setup() {
  // Initialize serial communication for debugging
  Serial.begin(9600);
  
  // Set TRIG pin as output and ECHO pin as input
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  // Send a 10 µs pulse to the TRIG pin to initiate measurement
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Measure the duration of the ECHO pulse
  long duration = pulseIn(echoPin, HIGH);

  // Calculate the distance in centimeters
  // Speed of sound = 343 m/s or 0.0343 cm/µs
  // Distance = (duration / 2) * 0.0343
  float distance = (duration / 2.0) * 0.0343;

  // Print the distance to the Serial Monitor
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  // Wait for a short period before the next measurement
  delay(100);
}

• The pulseIn() function measures the time for which the ECHO pin remains HIGH.
• The distance is calculated by dividing the duration by 2 (to account for the round trip of the ultrasonic wave) and multiplying by the speed of sound in air (0.0343 cm/µs).

1. No Output or Incorrect Distance Readings

   • Cause: Improper wiring or loose connections.
   • Solution: Double-check all connections, ensuring the VCC and GND pins are correctly connected.

2. Unstable or Fluctuating Readings

   • Cause: Electrical noise or interference.
   • Solution: Use decoupling capacitors near the power supply pins to reduce noise.

3. Sensor Not Responding

   • Cause: Incorrect trigger signal.
   • Solution: Ensure the TRIG pin receives a 10 µs TTL pulse.

4. Limited Range or Accuracy

   • Cause: Obstructions or environmental factors.
   • Solution: Ensure the sensor has a clear line of sight and is not used in noisy environments.

1. Can the SH-U09C5 measure distances below 2 cm?

   • No, the minimum measurable distance is 2 cm. Objects closer than this may not be detected accurately.

2. What is the maximum range of the SH-U09C5?

   • The sensor can measure distances up to 400 cm (4 meters).

3. Can I use the SH-U09C5 with a 3.3V microcontroller?

   • The SH-U09C5 requires a 5V power supply. If your microcontroller operates at 3.3V, use a level shifter for the TRIG and ECHO pins.

4. Is the SH-U09C5 waterproof?

   • No, the SH-U09C5 is not waterproof. Avoid using it in wet or humid environments.

By following this documentation, you can effectively integrate and use the SH-U09C5 ultrasonic sensor in your projects.