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TEACHING-MATERIALS/sample_code.md
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# Code Samples | |
To help you develop your sensor project you can make use of these code samples adapted from the samples provided by the Arduino IDE. | |
## Connecting to the Internet | |
One of the first tasks you will need to do is connect your ESP8266 to the internet by connecting to an access point. | |
### Connecting in the Lab | |
Unfortunately IoT devices such as NodeMCU (and Lego!) can't connect to the Main University WiFi and so we have set up a network for you to use. | |
The `ECL-LEGO-ROBOTS` network is setup to allow internet on ports 1883 and 8883 and so you should connect to this and make sure you only use these ports to communicate. | |
The code below will connect you to the | |
```cpp | |
#include <ESP8266WiFi.h> | |
#include <ESP8266WiFiMulti.h> | |
ESP8266WiFiMulti WiFiMulti; | |
void setup() { | |
Serial.begin(115200); | |
delay(10); | |
// We start by connecting to a WiFi network | |
WiFiMulti.addAP("ssid", "password"); | |
Serial.println(); | |
Serial.println(); | |
Serial.print("Wait for WiFi... "); | |
while(WiFiMulti.run() != WL_CONNECTED) { | |
Serial.print("."); | |
delay(500); | |
} | |
Serial.println(""); | |
Serial.println("WiFi connected"); | |
Serial.println("IP address: "); | |
Serial.println(WiFi.localIP()); | |
delay(500); | |
} | |
void loop() { | |
} | |
``` | |
### Connecting at Home | |
You should be able to connect to your home Wifi network without any issues by changing the ssid and password. If you are having problems check the _security settings_ and, if available, choose `WPA/WPA2-PSK (mixed mode)`. If you discover any more information that might be useful to others, edit this document and file a _merge request_. | |
You should see the NodeMCU listed under _connected devices_ on your router admin page, with the name `ESP_XXXXXX` where XXXXXX is part of the Mac Address. |