Fully functioning screen code

arduino/Screen code/Screen-code-final/.theia/launch.json

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+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  "version": "0.2.0",
+  "configurations": [
+  ]
+}

arduino/Screen code/Screen-code-final/Screen-code-final.ino

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+#include "headerFile.h"
+
+int i = 0;
+int questionID = 1;
+char* Question[] = {
+ "How clean are the toilets?",
+ "How clean is the study area?",
+ "What do you think of the temperature in the study area?",
+ "How crowded would you say the study area is?",
+ "Is there enough help available?"
+};
+
+char* Answer[] = {
+  "clean, normal, disgusting",
+  "clean, normal, disgusting",
+  "hot, perfect, cold",
+  "not at all, its fine, really crowded",
+  "no, decently, yes"
+};
+
+  Adafruit_ST7796S_kbv tft = Adafruit_ST7796S_kbv(TFT_CS, TFT_DC, MOSI, SCK, TFT_RST, MISO);
+  DisplayText displayText(tft); 
+
+void setup() {
+  //buttonpins
+  pinMode(16, INPUT_PULLDOWN);
+  pinMode(17, INPUT_PULLDOWN);
+  pinMode(18, INPUT_PULLDOWN);
+  Serial.begin(9600);
+
+  tft.begin(); // Initialize the display
+  tft.setRotation(3); // Set the rotation to horizontal
+  tft.fillScreen(ST7796S_BLACK);
+  displayText.writeText("Loading...", 3, 0, 200, 0, true, true);
+  websocketSetup();
+}
+
+
+void loop() {
+  webSocket.loop();
+  screenButtonHandler();
+}
+
+void websocketSetup(){
+	WiFiMulti.addAP("iotroam", "vbK9gbDBIB");
+  WiFiMulti.addAP("ObsidianAmstelveen", "drijversstraatmaastricht");
+
+	while(WiFiMulti.run() != WL_CONNECTED) {
+		delay(100);
+	}
+
+	// server address, port and URL
+	webSocket.begin("145.92.8.114", 80, "/ws");
+	// try ever 500 again if connection has failed
+	webSocket.setReconnectInterval(500);
+}
+
+void screenButtonHandler(){
+  
+  int redButton = digitalRead(16);
+  int whiteButton = digitalRead(17);
+  int greenButton = digitalRead(18);
+  
+  if (initialized) {
+    initialized = false;
+    tft.fillScreen(ST7796S_BLACK);
+    displayText.writeText(Question[i], 3, 0, 0, 0, true, false);
+    displayText.writeText(Answer[i], 3, 0, 200, 0, true, true);
+  }
+
+  if (redButton == HIGH){
+    sendData(questionID, "0");
+  }
+  if (whiteButton == HIGH){
+    sendData(questionID, "1");
+  }
+  if (greenButton == HIGH){
+    sendData(questionID, "2");
+  }
+
+
+
+  if (redButton || whiteButton || greenButton) {
+  i++;
+  questionID++;
+  if (questionID == 6){
+    questionID = 1;
+  } 
+  if (i == 5) {
+    i = 0;
+  }
+  tft.fillScreen(ST7796S_BLACK);
+  displayText.writeText(Question[i], 3, 0, 0, 0, true, false);
+  displayText.writeText(Answer[i], 3, 0, 200, 0, true, true);
+  }
+
+}
+
+void sendData(int question, String answer){
+  webSocket.sendTXT("{\"node\": \"" + String(WiFi.macAddress()) + "\", \"Response\":\"" + String(answer) + "\",\"QuestionID\":\"" + String(question) + "\"}");
+}
+
+void 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");
+}
+

arduino/Screen code/Screen-code-final/displayText.cpp

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+#include "displayText.h"
+#include "Arduino.h"
+
+//constructor
+DisplayText::DisplayText(Adafruit_ST7796S_kbv& tftDisplay) : tft(tftDisplay) {
+  tft.setCursor(0,0);
+  tft.fillScreen(ST7796S_BLACK);
+}
+//display text public function
+void DisplayText::writeText(char* text, int size, int posX, int posY, int screenTime, bool center, bool bottom) {
+  if (center) {
+    posX = centerText(text);
+  }
+  // if (bottom) {
+  //   posY = bottomText(text);
+  // }
+  tft.setCursor(posX, posY);
+  tft.setTextSize(size);
+  printWordsFull(text, bottom);
+  delay(screenTime);
+}
+
+//to center the text when enabled in the public function
+int DisplayText::centerText(char* text) {
+  int16_t x1, y1; 
+  uint16_t w, h;
+  tft.getTextBounds(text, 0, 0, &x1, &y1, &w, &h);
+  int x = (tft.width() - w) / 2;
+  return x;
+}
+
+// //to display the text at the bottom when enabled in the public function
+// int DisplayText::bottomText(char* text) {
+//   int16_t x1, y1;
+//   uint16_t w, h;
+//   tft.getTextBounds(text, 0, 0, &x1, &y1, &w, &h);
+//   int y = (tft.height() - h);
+//   return y;
+// }
+
+//attempt to write the text out in full (wip)
+void DisplayText::printWordsFull(char* text, bool bottom) {
+    const int screenWidth = 480; // replace with your TFT display width
+    const int lineHeight = 30; // replace with your text line height
+    //the double copy is needed so it doesnt alter the original text
+    char* newtext1 = strdup(text); // Create a copy of the string for the first strtok_r
+    char* newtext2 = strdup(text); // Create a second copy for the second strtok_r
+    char* saveptr1, *saveptr2;
+    char* word = strtok_r(newtext1, " ", &saveptr1);
+    char line[100] = "";
+    int lineCount = 0;
+    int lineWidth = 0;
+
+    // Calculate total number of lines
+    int totalLines = 0;
+    char* tempWord = strtok_r(newtext2, " ", &saveptr2);
+    while (tempWord != NULL) {
+        int16_t x1, y1;
+        uint16_t w, h;
+        tft.getTextBounds(tempWord, 0, 0, &x1, &y1, &w, &h);
+        if (lineWidth + w > screenWidth && strlen(line) > 0) {
+          //if the line width is greater than the screen width, then we need to add a new line
+            totalLines++;
+            lineWidth = w;
+            //otherwise we just add the width of the word to the line width
+        } else {
+            lineWidth += w;
+        }
+        tempWord = strtok_r(NULL, " ", &saveptr2);
+    }
+    totalLines++; // Add one for the last line
+
+    // Reset variables for actual printing
+    strcpy(line, "");
+    lineWidth = 0;
+
+    while (word != NULL) {
+        int16_t x1, y1;
+        uint16_t w, h;
+        tft.getTextBounds(word, 0, 0, &x1, &y1, &w, &h);
+
+        if (lineWidth + w > screenWidth && strlen(line) > 0) {
+            int y = bottom ? tft.height() - lineHeight * (totalLines - lineCount) : lineHeight * lineCount;
+            tft.setCursor(0, y);
+            tft.println(line);
+            lineCount++;
+            strcpy(line, word);
+            strcat(line, " ");
+            lineWidth = w;
+        } else {
+            strcat(line, word);
+            strcat(line, " ");
+            lineWidth += w;
+        }
+
+        word = strtok_r(NULL, " ", &saveptr1);
+    }
+
+    // print the last line
+    int y = bottom ? tft.height() - lineHeight * (totalLines - lineCount) : lineHeight * lineCount;
+    tft.setCursor(0, y);
+    tft.println(line);
+
+    free(newtext1); // Free the memory allocated by strdup
+    free(newtext2); // Free the memory allocated by strdup
+}

arduino/Screen code/Screen-code-final/displayText.h

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+#ifndef DISPLAYTEXT_H
+#define DISPLAYTEXT_H
+
+#include "Adafruit_GFX.h"
+#include "Adafruit_ST7796S_kbv.h"
+
+class DisplayText {
+  private:
+    Adafruit_ST7796S_kbv& tft;
+    int centerText(char* text);
+    // int bottomText(char* text);
+    void printWordsFull(char* text, bool bottom);
+
+  public:
+    DisplayText(Adafruit_ST7796S_kbv& tftDisplay);
+    void writeText(char* text, int size, int posX, int posY, int screenTime, bool center, bool bottom);
+};
+
+#endif

arduino/Screen code/Screen-code-final/headerFile.h

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+//screen stuff
+#include <SPI.h>
+#include "Adafruit_GFX.h"
+#include "Adafruit_ST7796S_kbv.h"
+#include "displayText.h"
+
+#define TFT_CS 14
+#define TFT_DC 13
+#define TFT_RST 12 
+#define MOSI 11
+#define SCK 10
+#define MISO 9
+
+//websocket stuff
+#include <WiFiMulti.h>
+#include <WiFi.h>
+#include <WebSocketsClient.h>
+#define USE_SERIAL Serial
+
+WiFiMulti WiFiMulti;
+WebSocketsClient webSocket;
+bool initialized = true;