IOT NodeMCU - NodeMCU Connection to Internet
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The document provides instructions for connecting the ESP8266 module to a local Wi-Fi network, highlighting its role as either a web server or a Wi-Fi client. It includes coding syntax for initializing Wi-Fi settings and checking connection status, as well as adjustments needed to fit specific network SSID and password. Key functions like 'wifi.begin()' and 'wifi.status()' are explained for effective implementation.
IOT NodeMCU - NodeMCU Connection to Internet
- 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