Ameba HTTP - Set up Server to Control LED

Getting started with Ameba HTTP - Set up Server to Control LED

We connect Ameba to WiFi and use Ameba as server, the user can control the LED on/off through a webpage.

First, connect Ameba with the LED.

In a LED, the longer pin is the positive pole, and the shorter pin is the negative pole. So, we connect the shorter pin to GND and connect the longer pin to D13. Additionally, to avoid the electric current exceeds the tolerance of the LED and causes damage, we connect a resistance on the positive pole.

Note:For RTL8720DN(BW16) board, you may consider to re-define “LED_PIN” macro to 10 for built-in green LED, or 11 for blue built-in LED, or 12 for red built-in LED to avoid using extra components.

Then open “File” -> “Examples” -> “AmebaWiFi” -> “SimpleWebServerWiFi”

In the sample code, modify the highlighted snippet to corresponding information.

Upload the code and press the reset button on Ameba. When the connection is established, you will see the message “To see this page in action, open a browser to http://xxx.xxx.xxx.xxx” in the Arduino IDE, as shown in the figure:

Next, open the browser of a computer or a cell phone under the same WiFi domain, enter the address in the message.

In the webpage, you can turn on/off the LED.

More resources:

For more information on the example: https://www.amebaiot.com/en/amebad-arduino-ameba-web-server/

If you are interested to know more about Ameba, do visit the Ameba official website or join the Facebook page or Forum for more discussion!

• Ameba Official Website: https://www.amebaiot.com/en/
• Ameba Facebook Group: https://www.facebook.com/groups/amebaioten
• Ameba Forum: https://forum.amebaiot.com/
• Instagram: https://www.instagram.com/amebaiotcrab/

Code Reference:

Use WiFi.begin() to establish WiFi connection.https://www.arduino.cc/en/Reference/WiFiBeginTo get the information of a WiFi connection:Use WiFi.SSID() to get SSID of the current connected network.https://www.arduino.cc/en/Reference/WiFiSSIDUse WiFi.RSSI() to get the signal strength of the connection.https://www.arduino.cc/en/Reference/WiFiRSSIUse WiFi.localIP() to get the IP address of Ameba.https://www.arduino.cc/en/Reference/WiFiLocalIPUse WiFiServer server() to create a server that listens on the specified port.https://www.arduino.cc/en/Reference/WiFiServerUse server.begin() to tell the server to begin listening for incoming connections.https://www.arduino.cc/en/Reference/WiFiServerBeginUse server.available() to get a client that is connected to the server and has data available for reading.https://www.arduino.cc/en/Reference/WiFiServerAvailableUse client.connected to get whether or not the client is connected.https://www.arduino.cc/en/Reference/WiFiClientConnectedUse client.println() to print data followed by a carriage return and newline.https://www.arduino.cc/en/Reference/WiFiClientPrintlnUse client.print() to print data to the server that a client is connected to.https://www.arduino.cc/en/Reference/WiFiClientPrintUse client.available() to return the number of bytes available for reading.https://www.arduino.cc/en/Reference/WiFiClientAvailableUse client.read() to read the next byte received from the server the client is connected to.https://www.arduino.cc/en/Reference/WiFiClientReadUse client.stop() to disconnect from the server the client is connected to.https://www.arduino.cc/en/Reference/WiFIClientStop