ESP8266 LCD I2C Code

#include <LiquidCrystal_I2C.h>

#include <ESP8266WiFi.h>          //https://github.com/esp8266/Arduino

//needed for library
#include <DNSServer.h>
#include <WiFiManager.h>         //https://github.com/tzapu/WiFiManager
#include <WiFiClient.h>
#include <ESP8266HTTPClient.h>

char url[]="http://filmsbykris.com/qr/2020/msg.php";


//amount to wait before loop start
int wait=10000;

//amount to wait each loop
int loop_wait=5000;

void scrollText();
void request();
// set the LCD number of columns and rows
int lcdColumns = 16;
int lcdRows = 2;

// set LCD address, number of columns and rows
// if you don't know your display address, run an I2C scanner sketch
LiquidCrystal_I2C lcd(0x3F, lcdColumns, lcdRows);

void setup(){
  // initialize LCD
  lcd.init();
  // turn on LCD backlight
  lcd.backlight();
      WiFi.mode(WIFI_STA); // explicitly set mode, esp defaults to STA+AP

    // put your setup code here, to run once:
    Serial.begin(115200);

    // WiFi.mode(WiFi_STA); // it is a good practice to make sure your code sets wifi mode how you want it.

    //WiFiManager, Local intialization. Once its business is done, there is no need to keep it around
    WiFiManager wm;

    //reset settings - wipe credentials for testing
    //wm.resetSettings();

    // Automatically connect using saved credentials,
    // if connection fails, it starts an access point with the specified name ( "AutoConnectAP"),
    // if empty will auto generate SSID, if password is blank it will be anonymous AP (wm.autoConnect())
    // then goes into a blocking loop awaiting configuration and will return success result

    bool res;
    // res = wm.autoConnect(); // auto generated AP name from chipid
    res = wm.autoConnect("Spy_Pager"); // anonymous ap
    // res = wm.autoConnect("AutoConnectAP","password"); // password protected ap

    if(!res) {
        Serial.println("Failed to connect");
        // ESP.restart();
    }
    else {
        //if you get here you have connected to the WiFi
        Serial.println("connected...yeey :)");
    }
    lcd.clear();
    lcd.setCursor(0, 0);
    // print message
    lcd.print("Secret Spy MSG!");
    lcd.setCursor(1, 0);
    lcd.print("Loading...");
}



void loop(){
  request(url);
  delay(loop_wait);
}

void request(char *url){
    WiFiClient client;

    HTTPClient http;

    Serial.print("[HTTP] begin...\n");
    if (http.begin(client, url)) {  // HTTP


      Serial.print("[HTTP] GET...\n");
      // start connection and send HTTP header
      int httpCode = http.GET();

      // httpCode will be negative on error
      if (httpCode > 0) {
        // HTTP header has been send and Server response header has been handled
        Serial.printf("[HTTP] GET... code: %d\n", httpCode);

        // file found at server
        if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_MOVED_PERMANENTLY) {
          String payload = http.getString();
          Serial.println(payload);
          lcd.clear();
          lcd.setCursor(0, 0);
          // print message
          lcd.print("Secret Spy MSG!");
          scrollText(1, payload, 250, lcdColumns);

        }
      } else {
        Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
        char msg[] = "[HTTP] GET... failed, error:";
        scrollText(1, msg, 250, lcdColumns);
      }

      http.end();
    } else {
      Serial.printf("[HTTP} Unable to connect\n");
      scrollText(1, "[HTTP} Unable to connect", 250, lcdColumns);
    }

}

void scrollText(int row, String message, int delayTime, int lcdColumns) {
  for (int i=0; i < lcdColumns; i++) {
    message = " " + message;
  }
  message = message + " ";
  for (int pos = 0; pos < message.length(); pos++) {
    lcd.setCursor(0, row);
    lcd.print(message.substring(pos, pos + lcdColumns));
    delay(delayTime);
  }
}