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/* | |
* This sketch demonstrates how to set up a simple HTTP-like server. | |
* The server will set a GPIO pin depending on the request | |
* http://server_ip/gpio/0 will set the GPIO2 low, | |
* http://server_ip/gpio/1 will set the GPIO2 high | |
* server_ip is the IP address of the ESP8266 Arduino module, will be | |
* printed to Serial when the module is connected. | |
*/ | |
// Include the ESP8266 library | |
#include <ESP8266WiFi.h> | |
// Specify your WiFi ssid and password | |
const char* ssid = "write your wifi ssid here"; | |
const char* password = "write your wifi password here"; | |
// Create an instance of the server | |
// specify the port to listen on as an argument | |
WiFiServer server(80); | |
// Define relay PIN | |
int ledPin = D2; | |
void setup() { | |
Serial.begin(115200); | |
delay(10); | |
// Setup relay PIN | |
pinMode(ledPin, OUTPUT); | |
digitalWrite(ledPin, LOW); | |
// Connect to WiFi network | |
Serial.println(); | |
Serial.println(); | |
Serial.print("Connecting to "); | |
Serial.println(ssid); | |
WiFi.begin(ssid, password); | |
while (WiFi.status() != WL_CONNECTED) { | |
delay(500); | |
Serial.print("."); | |
} | |
Serial.println(""); | |
Serial.println("WiFi connected"); | |
// Start the server | |
server.begin(); | |
Serial.println("Server started"); | |
// Print the IP address | |
Serial.println(WiFi.localIP()); | |
} | |
void loop() { | |
// Check if a client has connected | |
WiFiClient client = server.available(); | |
if (!client) { | |
return; | |
} | |
// Wait until the client sends some data | |
Serial.println("new client"); | |
while(!client.available()){ | |
delay(1); | |
} | |
// Read the first line of the request | |
String req = client.readStringUntil('\r'); | |
Serial.println(req); | |
client.flush(); | |
// Match the request | |
bool val; | |
if (req.indexOf("/gpio/0") != -1) | |
val = LOW; | |
else if (req.indexOf("/gpio/1") != -1) | |
val = HIGH; | |
else { | |
Serial.println("invalid request"); | |
client.stop(); | |
return; | |
} | |
// Set GPIO2 according to the request | |
digitalWrite(ledPin, val); | |
client.flush(); | |
// Prepare the response | |
String s = "HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n<!DOCTYPE HTML>\r\n<html>\r\nGPIO is now "; | |
s += (val)?"high":"low"; | |
s += "</html>\n"; | |
// Send the response to the client | |
client.print(s); | |
delay(1); | |
Serial.println("Client disonnected"); | |
// The client will actually be disconnected | |
// when the function returns and 'client' object is detroyed | |
} |
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