How to use sensors with Arduino

Curio Res
16 Aug 202005:41

Summary

TLDRThis tutorial guides viewers on connecting and plotting data from four sensors using an Arduino. It covers the DHT-11 for temperature and humidity, HC-SR04 for range, HC-SR501 for motion detection, and the GY521 for orientation assessment. The script details the process of wiring, using third-party libraries for sensor data interpretation, and visualizing data with a serial plotter. It also touches on adding additional sensors and emphasizes the ease of setup for most Arduino sensor breakouts.

Takeaways

  • 🔌 Connect and plot data from four sensors: DHT-11, HC-SR04, HC-SR501, and GY-521.
  • 🔧 Start by powering the breadboard with the Arduino's 5V supply before connecting the DHT-11 sensor.
  • 📚 Use a third-party DHT sensor library to simplify reading temperature and humidity data.
  • 💻 Open a serial port and set the baud rate to 9600 bits per second to send sensor data from the Arduino to your desktop.
  • 📊 Use the Arduino Serial Plotter to graph the data from the sensors.
  • 📏 Connect the HC-SR04 ultrasonic range sensor using the same method as the DHT-11 and install its library for range measurements.
  • 👁️‍🗨️ Wire the HC-SR501 motion detector similarly and use digitalRead to detect motion without needing a library.
  • 🔄 Connect the GY-521 sensor using I2C communication, and install the MPU6050 library to read orientation data.
  • 🔄 Use the getAngle commands to compute the GY-521's orientation, and test by rotating the sensor.
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Q & A

  • What are the four sensors mentioned in the tutorial?

    -The four sensors mentioned are DHT-11 for measuring temperature and humidity, HC-SR04 for measuring range, HC-SR501 for detecting motion, and GY-521 for assessing orientation.

  • How should the DHT-11 sensor be connected to the breadboard?

    -The DHT-11 sensor should be connected with the positive terminal to the 5-volt rail, the negative to ground, and the OUT or S pin to any of the Arduino digital pins.

  • Why is it not necessary to write code to interpret sensor readings from scratch?

    -It is not necessary because third-party libraries are available that can be used to interpret sensor readings, simplifying the coding process.

  • What is the purpose of a third-party library in this context?

    -A third-party library provides pre-written code that can be used to interact with specific sensors, making it easier to read and interpret data from those sensors.

  • How can one find and install a library for the DHT sensor?

    -One can search for a DHT sensor library in the Arduino Library Manager, click 'More Info' to visit the repository, and then install the library from there.

  • What is the baud rate set for serial communication in the tutorial?

    -The baud rate is set to 9600 bits per second for serial communication.

  • What command is used to start the DHT sensor in the code?

    -The command used to start the DHT sensor is 'dht.begin()'.

  • Why is it important to wait for a tenth of a second in the loop function?

    -Waiting for a tenth of a second ensures that sensor readings are taken and communicated at regular intervals.

  • How can one view the output of the HC-SR04 ultrasonic sensor?

    -One can view the output of the HC-SR04 sensor using the Serial Plotter in the Arduino IDE.

  • What is the default unit of measurement for the HC-SR04 sensor's range?

    -The default unit of measurement for the HC-SR04 sensor's range is in centimeters.

  • How does the HC-SR501 motion detector work?

    -The HC-SR501 motion detector sends a 1 to the pin when motion is detected and a 0 when no motion is detected. It has a built-in delay that can be adjusted with screws on the sensor.

  • What communication protocol does the GY-521 sensor use?

    -The GY-521 sensor uses I2C (Inter-Integrated Circuit) communication protocol.

  • What library is recommended for reading from the MPU-6050 sensor?

    -The Talkin' MPU 6050 library is recommended for reading from the MPU-6050 sensor.

  • How can the sensor's orientation be estimated using the MPU-6050?

    -The sensor's orientation can be estimated using the accelerometer and gyroscope readings from the MPU-6050, specifically by using the 'get angle' commands.

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Etiquetas Relacionadas
ArduinoSensorsDHT-11HC-SR04HC-SR501GY521Data PlottingI2C CommunicationMotion DetectionOrientation AssessmentDIY Electronics
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