123 lines
3.6 KiB
C++
123 lines
3.6 KiB
C++
/*
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Rui Santos
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Complete project details at Complete project details at https://RandomNerdTutorials.com/esp32-http-get-post-arduino/
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files.
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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*/
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#include <WiFi.h>
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#include <HTTPClient.h>
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#include <Arduino_JSON.h>
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const char* ssid = "Livebox-37cc";
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const char* password = "8A6060920A8A86896F770F2C47";
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//Your Domain name with URL path or IP address with path
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const char* serverName = "http://192.168.1.3:81/json.htm?type=command¶m=getuservariables";
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//const char* serverName = "http://api.openweathermap.org/data/2.5/weather?q=La%20gacilly,fr&APPID=feba3f4d926db3b358a25ec782bd1c8b&lang=FR&units=metric";
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// the following variables are unsigned longs because the time, measured in
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// milliseconds, will quickly become a bigger number than can be stored in an int.
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unsigned long lastTime = 0;
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// Timer set to 10 minutes (600000)
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//unsigned long timerDelay = 600000;
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// Set timer to 5 seconds (5000)
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unsigned long timerDelay = 5000;
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String sensorReadings;
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float sensorReadingsArr[3];
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void setup() {
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Serial.begin(115200);
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WiFi.begin(ssid, password);
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Serial.println("Connecting");
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while(WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println("");
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Serial.print("Connected to WiFi network with IP Address: ");
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Serial.println(WiFi.localIP());
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Serial.println("Timer set to 5 seconds (timerDelay variable), it will take 5 seconds before publishing the first reading.");
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}
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void loop() {
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//Send an HTTP POST request every 10 minutes
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if ((millis() - lastTime) > timerDelay) {
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//Check WiFi connection status
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if(WiFi.status()== WL_CONNECTED){
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sensorReadings = httpGETRequest(serverName);
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Serial.println(sensorReadings);
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JSONVar myObject = JSON.parse(sensorReadings);
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// JSON.typeof(jsonVar) can be used to get the type of the var
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if (JSON.typeof(myObject) == "undefined") {
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Serial.println("Parsing input failed!");
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return;
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}
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Serial.print("JSON object = ");
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Serial.println(myObject);
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// myObject.keys() can be used to get an array of all the keys in the object
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JSONVar keys = myObject.keys();
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for (int i = 0; i < keys.length(); i++) {
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JSONVar value = myObject[keys[i]];
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Serial.print(keys[i]);
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Serial.print(" = ");
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Serial.println(value);
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sensorReadingsArr[i] = double(value);
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}
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Serial.print("1 = ");
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Serial.println(sensorReadingsArr[0]);
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Serial.print("2 = ");
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Serial.println(sensorReadingsArr[1]);
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Serial.print("3 = ");
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Serial.println(sensorReadingsArr[2]);
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}
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else {
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Serial.println("WiFi Disconnected");
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}
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lastTime = millis();
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}
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}
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String httpGETRequest(const char* serverName) {
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WiFiClient client;
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HTTPClient http;
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// Your Domain name with URL path or IP address with path
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http.begin(client, serverName);
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// If you need Node-RED/server authentication, insert user and password below
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//http.setAuthorization("REPLACE_WITH_SERVER_USERNAME", "REPLACE_WITH_SERVER_PASSWORD");
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// Send HTTP POST request
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int httpResponseCode = http.GET();
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String payload = "{}";
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if (httpResponseCode>0) {
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Serial.print("HTTP Response code: ");
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Serial.println(httpResponseCode);
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payload = http.getString();
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}
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else {
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Serial.print("Error code: ");
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Serial.println(httpResponseCode);
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}
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// Free resources
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http.end();
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return payload;
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}
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