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In lesson 1 , we have learned how to use Arduino to make simple web server and display “Hello World” in your remote browser. In this lesson we will make a little more complicated project. We ’ll learn how to use remote browser to to send signal to Arduino through Internet and turn on/off an LED .
|Ethernet Shield W5100||1|
|200 ohm resistor||1|
First, please insert the W5100 Ethernet Shield into your UNO board, then use an RJ45 ethernet cable to connect your W5100 shield to your Router.
Then connect the LED long pin to D4 in W5100 shield through a 200 ohm resistor, LED short pin to GND , circuit is as below:
Download the sketch file from : https://osoyoo.com/driver/ethernet_iot/lesson2/w5100-lesson2.zip
Unzip the download file and enter the folder W5100-lesson2, double click the w5100-lesson2.ino file, upload the sketch to your Arduino. Open your Serial Monitor, you can see your router will assign an IP address to your Arduino as following:
In above example, 10.0.0.45 is the IP address of my Arduino.
Now use another computer or your cell phone’s browser to visit url : http://10.0.0.45
Your browser will show following result:
Click Turn On LED link, your LED will be turn on , then click Turn Off LED link, your LED will be turn off.
DownLoad Url osoyoo.com