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Websockets.ino
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Websockets.ino
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#include <ESP8266WiFi.h>
#include <ArduinoJson.h> // https://arduinojson.org/
#include <WebSocketsClient.h> // download and install from https://github.com/Links2004/arduinoWebSockets
#include <SocketIOclient.h>
#define SSID "<ssid username>"
#define PASSWORD "<your password>"
#define SERVER "localhost:4001" // Server URL (without https://www)
SocketIOclient socketIO;
void messageHandler(uint8_t* payload) {
StaticJsonDocument<64> doc;
DeserializationError error = deserializeJson(doc, payload);
if (error) {
Serial.println(error.f_str());
return;
}
String messageKey = doc[0];
bool value = doc[1];
if (messageKey == "buttonState") {
digitalWrite(LED_BUILTIN, value);
}
}
void socketIOEvent(socketIOmessageType_t type, uint8_t* payload, size_t length) {
switch (type) {
case sIOtype_DISCONNECT:
Serial.println("Disconnected!");
break;
case sIOtype_CONNECT:
Serial.printf("Connected to url: %s%s\n", SERVER, payload);
// join default namespace (no auto join in Socket.IO V3)
socketIO.send(sIOtype_CONNECT, "/");
break;
case sIOtype_EVENT:
messageHandler(payload);
break;
}
}
void setupWiFi() {
Serial.println("\nConnecting...");
WiFi.begin(SSID, PASSWORD);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
Serial.println("\nConnected : ");
Serial.println(WiFi.localIP());
}
void setup() {
pinMode(LED_BUILTIN, OUTPUT);
Serial.begin(9600);
setupWiFi();
// server address, port and URL
socketIO.begin(SERVER, 80, "/socket.io/?EIO=4");
socketIO.onEvent(socketIOEvent);
}
void loop() {
socketIO.loop();
}