====== ESP8266 : Serveur Web ======
===== Serveur Web #1 =====
Éteindre ou allumer une LED avec le navigateur Web. L'ESP8266 crée un réseau Wi-Fi, sur lequel va se connecter un ordinateur ou un téléphone mobile. Il suffit ensuite d'ouvrir le navigateur Web et d'entrer dans la barre d'adresse, l'adresse suivante : http://192.168.4.1/OFF pour éteindre la LED ou bien http://192.168.4.1/ON pour l'allumer.
{{:materiel:esp8266:esp-webserver.png?1000|}}
/*
* ESP8266 - Web Server
*
* Connect your computer to the Wi-Fi Network "Bonjour_IOT" with "12345678" password
* Open your favorite Web browser and enter "192.168.4.1/OFF" to switch off the Builtin LED or
* 192.168.4.1/ON" to switch it on
*
*/
#include
WiFiServer server(80); // Initialize the server on Port 80
int LED_PIN = 2;
void setup() {
pinMode(LED_PIN, OUTPUT);
WiFi.mode(WIFI_AP); // Our ESP8266-12E is an AccessPoint
WiFi.softAP("Hello_IOT", "12345678"); // Provide the SSID and password
server.begin(); // Start the HTTP Server
Serial.begin(115200); // Start communication between the ESP8266-12E and the monitor window
IPAddress HTTPS_ServerIP= WiFi.softAPIP(); // Obtain the IP of the Server
Serial.println();
Serial.print("Server IP is: "); // Print the IP to the monitor window
Serial.println(HTTPS_ServerIP);
}
void loop() {
WiFiClient client = server.available();
if (!client) {
return;
}
Serial.println("Somebody has connected :)");
//Read what the browser has sent into a String class and print the request to the monitor
//String request = client.readString();
String request = client.readStringUntil('\r');
//Looking under the hood
Serial.println(request);
// Handle the Request
if (request.indexOf("/OFF") != -1) digitalWrite(LED_PIN, HIGH);
else if (request.indexOf("/ON") != -1) digitalWrite(LED_PIN, LOW);
client.flush(); //clear previous info in the stream
client.print("ok"); // Send the response to the client
delay(10);
Serial.println("Client disconnected"); // Looking under the hood
}
===== Serveur Web #2 =====
Même chose avec un peu plus de contrôle.
{{:materiel:esp8266:esp-webserver-url.png?1000|}}
/*
* Access Point (AP) Web Server
*
* This example demonstrates how to turn the ESP8266 into an access point (AP), and serve up web pages to any connected client.
*
* From https://learn.sparkfun.com/tutorials/esp8266-thing-development-board-hookup-guide/example-sketch-web-server
*/
#include
// Pin Definitions
const int LED_PIN = 2; // LED
const int ANALOG_PIN = A0; // The only analog pin on the Thing
const int DIGITAL_PIN = 12; // Digital pin to be read
WiFiServer server(80);
void setup()
{
// Pins
Serial.begin(115200);
pinMode(DIGITAL_PIN, INPUT_PULLUP);
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, LOW);
// WiFi
WiFi.mode(WIFI_AP);
WiFi.softAP("Hello_IoT", "12345678"); // Provide the (SSID, password); .
server.begin();
}
void loop()
{
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Read the first line of the request
String req = client.readStringUntil('\r');
Serial.println(req);
client.flush();
// Match the request
int val = -1; // We'll use 'val' to keep track of both the
// request type (read/set) and value if set.
if (req.indexOf("/led/0") != -1)
val = 1; // Will write LED low
else if (req.indexOf("/led/1") != -1)
val = 0; // Will write LED high
else if (req.indexOf("/read") != -1)
val = -2; // Will print pin reads
// Otherwise request will be invalid. We'll say as much in HTML
// Set GPIO5 according to the request
if (val >= 0)
digitalWrite(LED_PIN, val);
client.flush();
// Prepare the response. Start with the common header:
String s = "HTTP/1.1 200 OK\r\n";
s += "Content-Type: text/html\r\n\r\n";
s += "\r\n\r\n";
// If we're setting the LED, print out a message saying we did
if (val >= 0)
{
s += "LED is now ";
s += (val)?"on":"off";
}
else if (val == -2)
{ // If we're reading pins, print out those values:
s += "Analog Pin = ";
s += String(analogRead(ANALOG_PIN));
s += "
"; // Go to the next line.
s += "Digital Pin 12 = ";
s += String(digitalRead(DIGITAL_PIN));
}
else
{
s += "Invalid Request.
Try /led/1, /led/0, or /read.";
}
s += "\n";
// Send the response to the client
client.print(s);
delay(1);
Serial.println("Client disconnected");
// The client will actually be disconnected
// when the function returns and 'client' object is detroyed
}