save state for my oop in aduino

arduino/node-code/nodeCodeFinal/headerFile.h

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+// include these libraries
+#include <Wire.h>
+#include <Adafruit_SH110X.h>
+#include <Adafruit_SGP30.h>
+#include "DHT.h"
+#include <WiFiMulti.h>
+#include <WiFi.h>
+// #include <WebSocketsClient.h>
+#include <nodeCodeHeader.h>
+#include <websockets.h>
+
+// define pins on esp32
+#define MICPIN 6
+#define DHTPIN 7
+#define SCL 9
+#define SDA 8
+#define DHTTYPE DHT11
+#define SCREEN_WIDTH 128
+#define SCREEN_HEIGHT 64
+#define i2c_adress 0x3c
+#define OLED_RESET -1   //   QT-PY / XIAO
+#define USE_SERIAL Serial
+
+// make new objects
+// Adafruit_SH1106G display = Adafruit_SH1106G(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
+// Adafruit_SH110X display = Adafruit_SH110X(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
+DHT dht(DHTPIN, DHTTYPE);
+WiFiMulti WiFiMulti;
+Adafruit_SGP30 sgp;
+// WebSocketsClient webSocket;
+
+// define variables
+uint16_t TVOC_base, eCO2_base;
+uint16_t counter = 0;
+uint16_t eCO2 = 0;
+uint16_t TVOC = 0;
+uint16_t interval = 5000;
+float temperature = 0;
+float humidity = 0;
+unsigned long currentMillis;
+unsigned long lastMillis;
+bool errorSGP30 = false;
+bool errorDHT11 = false;
+bool noise = false;

arduino/node-code/nodeCodeFinal/nodeCode.cpp

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+#include "arduino.h"
+#include "nodeCodeHeader.h"
+
+nodeReadings::nodeReadings() {
+}
+
+void nodeReadings::resetValues() {
+    counter = 0;
+    eCO2 = 0;
+    TVOC = 0;
+    temperature = 0;
+    humidity = 0;
+    currentMillis = 0;
+    lastMillis = 0;
+    errorSGP30 = false;
+    errorDHT11 = false;
+    noise = false;
+}

arduino/node-code/nodeCodeFinal/nodeCodeFinal.ino

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+#include <nodeCodeHeader.h>
+#include <websockets.h>
+
+nodeReadings esp32Node();
+websockets webSocket();
+
+void setup()
+{
+    // put your setup code here, to run once:
+    esp32Node.setup();
+    webSocket.websocketSetup();
+    esp32Node.resetValues();
+}
+
+void loop()
+{
+    // put your main code here, to run repeatedly:
+    esp32Node.loop();
+}

arduino/node-code/nodeCodeFinal/nodeCodeHeader.cpp

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+#include "arduino.h"
+#include "nodeCodeHeader.h"
+
+nodeReadings::nodeReadings() {
+}
+
+void nodeReadings::setup(){
+    // make serial connection at 115200 baud
+    Serial.begin(115200);
+
+    // tell display what settings to use
+    display.begin(i2c_adress, true);
+    display.clearDisplay();
+
+    // tell sensors to start reading
+    dht.begin();
+    sgp.begin();
+
+    pinMode(MICPIN, INPUT);
+    pinMode(DHTPIN, INPUT);
+
+}
+
+void nodeReadings::loop() {
+    // loop the websocket connection so it stays alive
+    webSocket.loop();
+
+    // update when interval is met
+    if (currentMillis - lastMillis >= interval){
+        lastMillis = millis();
+        update();
+    }
+
+    // update the counter
+    currentMillis = millis();
+}
+
+void nodeReadings::resetValues() {
+    counter = 0;
+    eCO2 = 0;
+    TVOC = 0;
+    temperature = 0;
+    humidity = 0;
+    currentMillis = 0;
+    lastMillis = 0;
+    errorSGP30 = false;
+    errorDHT11 = false;
+    noise = false;
+}
+
+
+
+void nodeReadings::update(){
+  // display sensordata on oled screen
+  displayData();
+  
+  // webSocket.sendTXT("{\"Temp\":\"" + String(temperature) + "\",\"Humi\":\"" + String(humidity) + "\",\"eCO2\":\"" + String(sgp.eCO2) + "\",\"TVOC\":\"" + String(sgp.TVOC) + "\"}");
+  webSocket.sendTXT("{\"node\": \"" + String(WiFi.macAddress()) + "\", \"Temp\":\"" + String(temperature) + "\",\"Humi\":\"" + String(humidity) + "\",\"eCO2\":\"" + String(sgp.eCO2) + "\",\"TVOC\":\"" + String(sgp.TVOC) + "\"}");
+
+  sgp.getIAQBaseline(&eCO2_base, &TVOC_base);
+
+  // read dht11 sensor
+  temperature = float(dht.readTemperature());
+  humidity = float(dht.readHumidity());
+
+  // check if any errors occured when reading sensors
+  checkForError();
+}

arduino/node-code/nodeCodeFinal/nodeCodeHeader.h

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+#ifndef nodeReading_h
+#define nodeReading_h
+
+#include "Arduino.h"
+#include "headerFile.h"
+
+
+class nodeReadings {
+
+    public:
+        nodeReadings();
+        void setup();
+        void loop();
+        void resetValues();
+        void update();
+
+
+    private:
+};
+
+#endif

arduino/node-code/nodeCodeFinal/websockets.cpp

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+#include "arduino.h"
+#include "websockets.h"
+
+// hexdump function for websockets binary handler
+void websockets::hexdump(const void *mem, uint32_t len, uint8_t cols = 16) {
+	const uint8_t* src = (const uint8_t*) mem;
+	USE_SERIAL.printf("\n[HEXDUMP] Address: 0x%08X len: 0x%X (%d)", (ptrdiff_t)src, len, len);
+	for(uint32_t i = 0; i < len; i++) {
+		if(i % cols == 0) {
+			USE_SERIAL.printf("\n[0x%08X] 0x%08X: ", (ptrdiff_t)src, i);
+		}
+		USE_SERIAL.printf("%02X ", *src);
+		src++;
+	}
+	USE_SERIAL.printf("\n");
+}
+
+// special function to setup websocket
+void websockets::websocketSetup(){
+	WiFiMulti.addAP("iotroam", "vbK9gbDBIB");
+  WiFiMulti.addAP("LansanKPN-boven", "19sander71vlieland14");
+
+	while(WiFiMulti.run() != WL_CONNECTED) {
+		delay(100);
+	}
+
+	// server address, port and URL
+	webSocket.begin("145.92.8.114", 80, "/ws");
+
+	// event handler
+	webSocket.onEvent(webSocketEvent);
+
+	// try ever 500 again if connection has failed
+	webSocket.setReconnectInterval(500);
+}

arduino/node-code/nodeCodeFinal/websockets.h

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+#ifndef websockerts_h
+#define websockerts_h
+
+#include "Arduino.h"
+#include "websocketsHeader.h"
+
+class websockets {
+    public:
+        websockets();
+        void hexdump(const void *mem, uint32_t len, uint8_t cols = 16);
+    private:
+};
+
+#endif

arduino/node-code/nodeCodeFinal/websocketsHeader.h

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+#include <Wire.h>
+#include <Adafruit_SH110X.h>
+#include <Adafruit_SGP30.h>
+#include "DHT.h"
+#include <WiFiMulti.h>
+#include <WiFi.h>
+#include <WebSocketsClient.h>
+#include <nodeCodeHeader.h>
+#include <websockets.h>
+
+
+
+
+// WebSocketsClient webSocket;