WiFi Internet of Things Learning Kit for Learn Coding with Arduino IDE 11: Channel Relay

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

In this lesson, we’ll learn how to use a cell phone app to control a relay switch and turn on/off an LED. A relay is a switch that can turn on/off a high voltage circuit with a low voltage signal. We often use relays to control 110V or 220V devices in homes and offices.

• OSOYOO Basic board x 1
• OSOYOO ESP8266 WIFI Shield x 1
• Relay module x 1
• LED x 1
• 1K resistor x 1
• Breadboard x 1
• USB cable x 1
• Jumper wires several

First, please insert the ESP8266 wifi shield into your OSOYOO Basic board.

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

Step B) Connect the OSOYOO Basic board to your 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/lesson11/esp8266-lesson11B.zip Unzip the file and double click the esp8266-lesson11B.ino file. Load the sketch into IDE and 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 IDE.

Step F) Open your serial monitor and you can see your router will assign an IP address to your IDE as follows.

Please set your UDP app target IP to: 192.168.50.47, target port 8888.

In the above example, 192.168.50.47 is the IP address of my mainboard, and 8888 is the UDP port number that will be set into our cell phone app in the next step.

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