WiFi Internet of Things Learning Kit for Learn Coding with Arduino IDE 9: Obstacle Distance

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• • OBJECTIVE
  • PARTS AND DEVICES
  • HOW TO MAKE
  • HOW TO CODE
  • HOW TO PLAY
  • RESULT

In this lesson, we will learn how to use the HC-SR04 Ultrasonic sensor to measure distances and send data to a remote APP.

OSOYOO Basic  board x 1

OSOYOO ESP8266 WIFI Shield x 1

HC-SR04 Ultrasonic sensor module x 1

USB cable x 1

Jumper wires several

First, please insert the ESP8266 WiFi Shield into your mainboard.

• Make sure the jumper cap is connected from E_TX to D4 and E_RX to D5.
  Connect the HC-SR04 with the mainboard as shown in the following diagram:
  

  OSOYOO Basic  Board	HC-SR04
  5v	VCC
  GND	GND
  D8	Trig
  D7	Echo

  

   

  Software Installation:
  Step A) Install the latest IDE from https://www.arduino.cc/en/Main/Software?setlang=en. If you have IDE version 1.1.16 or later, please skip this step.

  Step B) Connect the OSOYOO Basic board to the computer via a USB cable.

  Step C) Open the IDE and choose the corresponding board type and port type for your project.

  • Board:”Arduino/Genuino UNO”
  • Port: Choose your own Serial Port for your mainboard

  Step D) Download the sketch file from https://osoyoo.com/driver/wifi-iot/lesson9/wifi-lesson9.zip,

• unzip the file and double-click the wifi-lesson9.ino file to load the sketch into the IDE.
• Find the following lines:

  char ssid[] = "******"; // your network SSID (name)
  char pass[] = "******"; // your network password

  Please replace the ****** with your correct wifi SSID and password; otherwise, your
   project cannot connect to the internet.
  

  Step E) After changing the above lines, load the sketch into the IDE. 
  

  Open your Serial Monitor, and you can see that your router will assign an IP address to your IDE, as shown below:
  

  

• In the above example, 192.168.1.81 is the IP address of my IDE. We need to set this IP address in our APP in the next step.

• Step F) Open your OSOYOO IOT UDP Robot APP. If you haven’t installed this APP, please read the APP installation section in Lesson 2.

• Step G) Make sure your cell phone is on the same local network as Arduino. Open the APP, click Settings, enter your Arduino IP address from Step F, and set the port to 8888 in settings.

• 

Now press any key on your APP, and your screen will display something like the following picture.

• Learn More about parts

  No.	Picture	Product Name	Link
  1		OSOYOO basic board	https://osoyoo.store/products/osoyoo-uno-r3-for-arduino?variant=31955265290351
  2		OSOYOO WIFI shield	https://osoyoo.store/products/esp8266-wifi-shiled-osoyoo-wifi-internet-of-things-learning-kit-for-arduino-uno?variant=31955252215919
  3		Photoresistor Sensor Module	https://osoyoo.store/products/photoresistor-sensor-module-light-detection-digital-switch-mete-for-arduino?variant=31955271057519
  4		Water Level Detection Sensor	https://osoyoo.store/products/rain-water-level-sensor-module-detection-liquid-surface-depth-height-for-arduino?variant=31955273810031
  5		Sound Detection Sensor Module	https://osoyoo.store/products/high-sensitivity-sound-microphone-sensor-detection-module-for-arduino-avr-pic?variant=31955278921839
  6		Ultrasonic sensor	https://osoyoo.store/products/hc-sr04-ultrasonic-sensor-module-for-arduino?variant=31957815558255
  7		Servo motor	https://osoyoo.store/products/sg90-micro-servo-for-arduino-raspberry-pi-robot?variant=31957821096047
  8		Active Buzzer Module	https://osoyoo.store/products/buzzer-sensor-module-for-esp8266-iot-kit?variant=31955947225199
  9		Temperature&Humidity Sensor	https://osoyoo.store/products/dht11-temperature-humidity-sensor-module-for-arduino?variant=31955953221743
  10		Relay Module	https://osoyoo.store/products/single-channel-relay-module-for-arduino-raspberry-pi?variant=31955954401391
  11		Gas Sensor Module	https://osoyoo.store/products/mq-2-smoke-sensor-for-arduino?variant=31955955417199
  12		Digital Barometric Pressure Sensor Module	https://osoyoo.store/products/bmp180-high-precision-pressure-sensor-for-arduino?variant=31957739339887
  13		Infrared Sensor Module	https://osoyoo.store/products/hc-sr501-pir-motion-sensor-for-arduino?variant=31957812838511
  14		LED(6 x White, 6 x Red, 6 x Yellow, 6x Green)	https://osoyoo.store/products/led-packs-for-arduino?variant=31957816442991