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 use Cell Phone APP  to control a relay switch to turn on/off an LED.
Relay is switch which is turn on/off a high voltage circuit with low voltage signal. We often use relay to control 110V or 220 V devices in home and office.

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

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

Step C) Open the IDE and choose corresponding board type and port type for you 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, find 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 can
 not connect to Internet.

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

STEP F)Open your Serial Monitor, you can see your router will assign an IP address to your IDE as following:

please set your UDP APP target IP to: 192.168.50.47 target port 8888

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

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

Step H)Make sure your Cell phone is in the same Local Network of Arduino. Open the APP, click Settings, enter your Arduino IP address from Step F and Port to 8888 in settings:

Notes:When the phone is operating the APP，Please keep the phone on the same LAN with UNO board .
Now click Save and go back to   your APP Home Screen:
Press F1 , Your Relay will open and LED will on. Press F2, Your relay and LED will turn off

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