In this lesson, we will show you how to make simple Internet of Things (IoT) project – to turn on/off an LED from a remote browser .
We will use Osoyoo Mega-IoT Shield to connect LED and MEGA2560 MCU board. Arduino MEGA2560 board can work as a web server. Remote browser can access this web server and control the LED connected to D13 pin of MEGA2560.
First, please plug OSOYOO MEGA-IoT Extension Board into MEGA2560 board:
Then connect the LED module to the D13 port of the OSOYOO MEGA-IoT Extension Board with a 3-pin PnP cable as below (Jumper Cap should connect ESP8266 RX with A8, TX with A9):
Step 1 Install latest Arduino IDE (If you have Arduino IDE version after 1.1.16, please skip this step)
Download Arduino IDE from https://www.arduino.cc/en/Main/Software?setlang=en , then install the software.
Step 2 WifiEsp Library Installation (if you have installed WifiESP library, please skip this step)
OSOYOO MEGA-IoT extension TX/RX pin to Arduino A9/A8 pin by default. So in Arduino sketch code, we need use Software Serial Port to communicate with ESP8266 (set A9 as TX and A8 as RX in softwareserial object).
To use this wifi shield in Arduino IDE, we need download WiFiEsp-master library from following link:
https://osoyoo.com/driver/WiFiEsp-master.zip
Open Arduino IDE, click Sketch – Include Library- Add .Zip library to load above zip files into Arduino IDE.
Step 3 After installing above library, please download the main code from following link, unzip it, you will see a folder called “smarthome-lesson4”:
https://osoyoo.com/driver/smarthome/smarthome-lesson4.zip
Step 4 After above operations are completed, connect OSOYOO MEGA2560 Board to PC with USB cable.
Step 5 Arduino IDE: Choose corresponding board type and port type for you project .
Step 6 Arduino IDE: Click file – Open, then choose code “smarthome-lesson4.ino” in the folder, load up the sketch onto your Arduino.
Note: In the sketch, find line 24,25 as following:
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.
After loading the sketch to Arduino , open the serial monitor in the upper-right corner of Arduino IDE, you will see following result:
From the serial monitor, you can see the IP address of your MEGA2560 board in the read circle (in above picture, 192.168.50.102).
Then use your browser to visit the website http://mega2560-ip-address (in above case, http://192.168.50.102), you will see following result:
Click the two links as showed in above picture, you will turn on/off the LED module which is connected to your MEGA2560 through the IoT Shield.
DownLoad Url osoyoo.com
You must be logged in to post a comment.
I have attempted using this kit through Lesson 9 and have not been able to get any LEDs working. Lesson 3 works as expected. Lesson 4 shows the expected results on the Serial Monitor and on the generated website (including the /H and /L in the URL bar), but the LED does not light. Substituting the red LED with yellow and green also shows no light. Lesson 5 works exactly as described. Lesson 6 shows the expected results on the Serial Monitor and on the generated website, but the buzzer does not activate. Lesson 7, as far as I can tell, works as expected. I have not yet studied the code, but the values on the Serial Monitor refresh constantly, while I was expecting a refresh every 20 seconds following what was said on the generated webpage, but this might be normal. Lesson 8 shows the expected results on the Serial Monitor and on the generated website; however, while the servo operates, the LED does not. Lesson 9 may be working, but the sensor only detected fire and never showed a safe condition. Based on these results, I would suspect that the extension board is faulty. Although the instructions said that if the MEGA2650 and the extension board came as a unit, they should be left that way, I removed the extension board and a visual inspection did not show any obvious defects. I reseated the extension board on the MEGA2650 and still have the same results. The only other comment I have is that there is some personal information, i.e., SSID and password, not replaced by “*******” for, I think, Lesson 8 and Lesson 17. Well, perhaps it is not the extension board. With Lesson 4 running and measuring voltages at the LED, I get 5 VDC between VCC and ground, and when I touch the multimeter at GND and SIG, then the LED goes on. What can I do to complete these lessons? The Amazon return deadline is 11 July. Should I return this item or attempt to get an exchange?