IOT NodeMCU - NodeMCU Connection to Internet --------------------------------------------------------------------------- Email: elafe1888@gmail.com linkden: www.linkedin.com/in/elaf-a-saeed-97bbb6150 facebook: https://www.facebook.com/profile.php?id=100004305557442 twitter: https://twitter.com/ElafASaeed1 github: https://github.com/ElafAhmedSaeed youtube: https://youtube.com/channel/UCE_RiXkyqREUdLAiZcbBqSg slideshare: https://www.slideshare.net/ElafASaeed Slideplayer: https://slideplayer.com/search/?q=Elaf+A.Saeed Google Scholar: https://scholar.google.com/citations?user=VIpVZKkAAAAJ&hl=ar&gmla=AJsN-F7PIgAjWJ44Hzb18fwPqJaaUmG0XzbLdzx09

1. Internet ofThings
NodeMCU Connection to Internet
Eng. Elaf A.Saeed

2. The Contents
• Enabling technology for IOT.
• Connect ESP8266 to a local WI-FI Network (cont.)

3. Enabling technology for iot (cont.)
• Light-Fidelity (Li-Fi)

4. Enabling technology for iot
• Ethernet

5. Enabling technology for iot (cont.)
• Wi-Fi

6. Connect ESP8266 to a local WI-FI
Network

7. Connect ESP8266 to a local WI-FI
Network (cont.)
• The ESP8266 module can either be a web server (Access Point) or Wi-Fi
(Station).
• when used as a web server, the ESP8266 hosts a web application on a web
page that connected clients can access.
• As a Wi-Fi client, the ESP8266 connects to local or online servers and logs
data to them or reads from them.

8. Connect ESP8266 to a local WI-FI
Network (cont.)

9. Connect ESP8266 to a local WI-FI
Network (cont.)
• The function the is used in code:
1. WiFi.begin() ➔ Initializes the Wi-Fi library's network settings and provides the current status.
Syntax
✓ WiFi.begin();
✓ WiFi.begin(ssid);
✓ WiFi.begin(ssid, pass);
❑Parameters:
• ssid: the SSID (Service Set Identifier) is the name of the WiFi network you want to connect to.
• pass: WPA encrypted networks use a password in the form of a string for security.

10. Connect ESP8266 to a local WI-FI
Network (cont.)
• WiFi.status() ➔ Return the connection status.
Syntax
• WiFi.status();
Parameters
• none
Returns
• WL_NO_SSID_AVAIL: assigned when no SSID are available;
• WL_CONNECTED: assigned when connected to a Wi-Fi network;
• WL_CONNECT_FAILED: assigned when the connection fails for all the attempts;

11. Connect ESP8266 to a local WI-FI
Network (cont.)
• This program will connect your ESP to a WIFI network and print its IP
address on your Arduino serial monitor.
• You need to modify your ssid and password
• const char* ssid = "YOUR WIFI NETWORK NAME";
• const char* password = "YOUR WIFI PASSWARD";
• make sure that the Baud rate in the program and your serial monitor window
are the same

12. Connect ESP8266 to a local WI-FI
Network (cont.)

13. Connect ESP8266 to a local WI-FI
Network (cont.)

14. Thanks