Ino + .h comms - Reading img from SD card (+ to print on thermal printer)

[mgualash]

how do I get my .ino to get this variable from the .h ?

(+ any tips for the project in general? I want to eventually use an API to fetch a random number, which will select 1 of 100 img files from the sd card, and print it using a thermal printer)

"Compilation error: 'chosenFileData' was not declared in this scope"

ino:

#include "Adafruit_Thermal.h"
#include "adalogo.h"
#include "adaqrcode.h"
#include "printerHFile.h"

// Here's the new syntax when using SoftwareSerial (e.g. Arduino Uno) ----
// If using hardware serial instead, comment out or remove these lines:

#include "SoftwareSerial.h"
#define TX_PIN 6 // Arduino transmit  YELLOW WIRE  labeled RX on printer
#define RX_PIN 5 // Arduino receive   GREEN WIRE   labeled TX on printer

SoftwareSerial mySerial(RX_PIN, TX_PIN); // Declare SoftwareSerial obj first
Adafruit_Thermal printer(&mySerial);     // Pass addr to printer constructor
// Then see setup() function regarding serial & printer begin() calls.

// Here's the syntax for hardware serial (e.g. Arduino Due) --------------
// Un-comment the following line if using hardware serial:

//Adafruit_Thermal printer(&Serial1);      // Or Serial2, Serial3, etc.

// -----------------------------------------------------------------------
////////////// SD CARD READING INITIALISATION ////////////////////////
#include <SD.h>

const int chipSelect = 10;
File myFile;
///////////m e:
char chosenFileData;
//////////////////////////////////////////////////////////////////////
void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  // wait for Serial Monitor to connect. Needed for native USB port boards only:
  while (!Serial);

  Serial.print("Initializing SD card...");

  if (!SD.begin(chipSelect)) {
    Serial.println("initialization failed. Things to check:");
    Serial.println("1. is a card inserted?");
    Serial.println("2. is your wiring correct?");
    Serial.println("3. did you change the chipSelect pin to match your shield or module?");
    Serial.println("Note: press reset button on the board and reopen this Serial Monitor after fixing your issue!");
    while (true);
  }

  Serial.println("initialization done.");

  ///
 //open the file for reading:
  myFile = SD.open("'j1', 384x533px.txt");
  if (myFile) {
    Serial.println("'j1', 384x533px.txt:");

    // read from the file until there's nothing else in it:
    while (myFile.available()) {
      // Serial.write(myFile.read());
    char chosenFileData = myFile.read ;
    }
    // close the file:
    myFile.close();
  } else {
    // if the file didn't open, print an error:
    Serial.println("error opening 'j1', 384x533px.txt");
  }

//////////  PRINTER SETUP //////////////////////////////////

  // This line is for compatibility with the Adafruit IotP project pack,
  // which uses pin 7 as a spare grounding point.  You only need this if
  // wired up the same way (w/3-pin header into pins 5/6/7):
  pinMode(7, OUTPUT); digitalWrite(7, LOW);

  // NOTE: SOME PRINTERS NEED 9600 BAUD instead of 19200, check test page.
  mySerial.begin(19200);  // Initialize SoftwareSerial
  //Serial1.begin(19200); // Use this instead if using hardware serial
  printer.begin();        // Init printer (same regardless of serial type)

////// <<< deleted some examples on text printing >.> /////////////

  // Print the 75x75 pixel logo in adalogo.h:
  printer.printBitmap(adalogo_width, adalogo_height, adalogo_data);

  printer.printBitmap(printerHFile_width,printerHFile_height,printerHFile_data);

  // // Print the 135x135 pixel QR code in adaqrcode.h:
  // printer.printBitmap(adaqrcode_width, adaqrcode_height, adaqrcode_data);
  // printer.println(F("Adafruit!"));
  printer.feed(2);

  printer.sleep();      // Tell printer to sleep
  delay(3000L);         // Sleep for 3 seconds
  printer.wake();       // MUST wake() before printing again, even if reset
  printer.setDefault(); // Restore printer to defaults
}

void loop() {
}

printerHFile.h

#define j1scaled_width 384
#define j1scaled_height 533

static const uint8_t PROGMEM jprinterHFile_data [] = {
chosenFileData ;
};

arduino uno r4 wifi