Need som help with a wifi pager code - Heltec Wifi 8

[sa7bnb]

Hello, I would like some help with a web-based pager i’m trying to build. My problem is that I want to get the maximum text size of “waiting” message and incoming message. As it is now, If i increase the font size of the incoming message, it looks very strange and bad. Wished I could handle more than 20 characters messages and that the text had been maximum. Anyone good at coding who can help me?
Okey i kniw it's not a real arduino but the board type is a Heltec Wifi 8.

Here is my code: GitHub - sa7bnb/web-based-pager: web-based pager system - Heltec Wifi 8

[sa7bnb]

#include <ESP8266WiFi.h>
#include <ESP8266WebServer.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// WiFi settings
const char* ssid = "SID";
const char* password = "PASSWORD";

// Screen settings
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 32
#define OLED_RESET 16
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// Buttons and LED
const int buttonReset = D3;
const int buttonNext = D4;
const int buttonPrev = D5;
const int buzzer = D6;
const int ledPin = D7;

// Webserver
ESP8266WebServer server(80);

// Message variables and password
std::vector messages;
int messageIndex = -1;
const int maxMessages = 5;
const String passwordToSend = "1234";

void setup() {
pinMode(buttonReset, INPUT_PULLUP);
pinMode(buttonNext, INPUT_PULLUP);
pinMode(buttonPrev, INPUT_PULLUP);
pinMode(buzzer, OUTPUT);
pinMode(ledPin, OUTPUT);

Wire.begin(4, 5);
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.clearDisplay();
display.display();
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(5, 10);
display.println("Waiting!");
display.display();
delay(1000);
display.startscrollleft(0x00, 0x0F);

WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
}

server.on("/", HTTP_GET, handleRoot);
server.on("/sendMessage", HTTP_POST, handleMessage);
server.begin();
}

void loop() {
server.handleClient();
if (!digitalRead(buttonReset)) {
resetMessages();
delay(1000);
}
if (!digitalRead(buttonNext)) {
nextMessage();
delay(1000);
}
if (!digitalRead(buttonPrev)) {
prevMessage();
delay(1000);
}
}

void handleRoot() {
String html = "

Please use only English characters

";
html += "";
html += "Message (max 20 characters): ";
html += " Password: ";
html += "";
html += "";

html += "

";
html += "Copyright - Anders Isaksson - SA7BNB 2024";
html += "

";
server.send(200, "text/html", html);
}

void handleMessage() {
if (server.hasArg("password") && server.arg("password") == passwordToSend) {
if (server.hasArg("message")) {
String newMessage = server.arg("message");
if (newMessage.length() > 20) {
server.send(200, "text/html", "

Error: Message too long!.

Back");
return;
}
if (messages.size() >= maxMessages) {
messages.erase(messages.begin());
}
messages.push_back(newMessage);
messageIndex = messages.size() - 1;
displayMessage();
alertNewMessage();
server.send(200, "text/html", "

Message Sent!

Back");
} else {
server.send(200, "text/html", "

Error: No Message Sent!.

Back");
}
} else {
server.send(403, "text/html", "

Wrong Password!.

Back");
}
}

void displayMessage() {
display.clearDisplay();
display.setTextSize(1);
if (messageIndex >= 0 && messageIndex < messages.size()) {
display.setCursor(5, 20);
display.println(messages[messageIndex]);
}
display.display();
delay(1);
display.startscrollleft(0x00, 0x0F);
}

void nextMessage() {
if (messageIndex < messages.size() - 1) {
messageIndex++;
display.setCursor(5, 20);
display.setTextSize(1);
displayMessage();
delay(1);
display.startscrollleft(0x00, 0x0F);
}
}

void prevMessage() {
if (messageIndex > 0) {
messageIndex--;
display.setCursor(5, 20);
display.setTextSize(1);
displayMessage();
delay(1);
display.startscrollleft(0x00, 0x0F);
}
}

void resetMessages() {
messageIndex = -1;
display.clearDisplay();
display.display();
digitalWrite(ledPin, LOW);
}

void alertNewMessage() {
digitalWrite(buzzer, HIGH);
delay(1000);
digitalWrite(buzzer, LOW);
delay(1000);
digitalWrite(ledPin, HIGH);
}