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In this lesson, we will show you how to get DHT11 data remotely, this example shows how value can be pushed from Arduino to a remote browser.

We  will  use  Osoyoo Mega-IoT Shield  to connect DHT11 sensor and MEGA2560 MCU board.  Arduino MEGA2560 board can work as a web server. Remote browser can access this web server and get the data of DHT11 connected to D2 pin of MEGA2560.

First please plug OSOYOO MEGA-IoT Extension Board into MEGA2560 board:

Then connect the DH11 Temp & Hum  Sensor to the D2 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.

Step2 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

You need go to Arduino IDE ->Sketch ->Include Library ->Add ,Zip library to load above zip files into Arduino IDE.

To use the DHT11 sensor here, you also need to install the DHT11 library as above operations.

Step 3 After installing above libraries, please download the main code from following link, unzip it, you will see a folder called “smarthome-lesson7”:

https://osoyoo.com/driver/smarthome/7/smarthome_lesson7.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 fileOpen, then choose code “smarthome-lesson7.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, 192.168.50.8).

Then use your browser to visit the website http://mega2560-ip-address (in above case, http://192.168.50.8), you will see following result:

From here, you can see a simple web server that shows the temperature and humidity data of the DHT11 sensor. The web page will be automatically refreshed each 20 seconds. Wait a minute, you may see the following data on the web page: