# Read byte array from file

**URL:** https://discourse.processing.org/t/read-byte-array-from-file/31474
**Category:** Coding Questions
**Created:** [July 28, 2021, 11:34am UTC](https://discourse.processing.org/t/read-byte-array-from-file/31474 "2021-07-28T11:34:23Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![Vadimkuzmin](https://avatars.discourse-cdn.com/v4/letter/v/6de8d8/32.png) [@Vadimkuzmin](https://discourse.processing.org/u/Vadimkuzmin)
#### Post date: [July 28, 2021, 11:34am UTC](https://discourse.processing.org/t/read-byte-array-from-file/31474/1 "2021-07-28T11:34:23Z")

</div>

```auto
void Impuls(File selection) {
  if (selection == null) {
    println("Window was closed or the user hit cancel.");
  } else {
    println("User selected " + selection.getAbsolutePath());
    String[] lines = loadStrings(selection.getAbsolutePath());
    inputPULI.setValue(lines.length); // ПРОЧИТАЛИ СТРОКИ
    
        String[] items = lines[0].split(" ");
        String[] items1 = lines[1].split(" ");
        String[] items2 = lines[2].split(" ");
        String[] items3 = lines[3].split(" ");
        String[] items4 = lines[4].split(" ");
            println(items[0]);
            serialPort.write(items[0]);
            println(items[1]);
            serialPort.write(items[1]);
            println(items1[0]);
            serialPort.write(items1[0]);
            println(items1[1]);
            serialPort.write(items1[1]);
            println(items2[0]);
            serialPort.write(items2[0]);
            println(items2[1]);
            serialPort.write(items2[1]);
            println(items3[0]);
            serialPort.write(items3[0]);
            println(items3[1]);
            serialPort.write(items3[1]);
            println(items4[0]);
            serialPort.write(items4[0]);
            println(items4[1]);
            serialPort.write(items4[1]);
           {
           writeuploadimpuls();
           }      
          }
}

```

Run File dodo.pde  
See the screen “123.png” The screenshot shows an arrow where to open the file!

 ![123](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/2X/4/4c654d238bfed4c14a5076e228e3567d7c036246.png)

When reading the file “Impuls.txt” through the download button, the lines are read (number of pulses of bullets)  
Through a space in the console, for your own understanding, the first 5 pulses with numbering are displayed in a column.  
Then these impulses 5 pieces (so far) are written to the port in the form of characters in the “hex” display mode.  
Code section GUI tab - lines 356-396.  
Line 393 The button handler is associated with the Protokol tab lines 41-54.  
Now the characters of the string are sent to the port, they will be hidden:  
1  
8500  
2  
8470  
3  
8450  
4  
8440  
5  
8435  
How to send numbers without numbering 85008470845084408435???  
8500 is 4 bytes  
But the whole task is reduced to one, you need to work with bytes, not strings, that is:

1. Read byte array from file (reading bytes from a file) and send it, then to the W25Q memory.
2. There is loadstrings, it gives a string array, but there is a type of such readbytes, I don’t know the name, it gives a byte array. It is necessary to look in the processing documentation.

Full project in the archive:  
[https://drive.google.com/file/d/1KzsV4J\_czBPj80Jm0PQnzeRVq3h7BObB/view?usp=drivesdk](https://drive.google.com/file/d/1KzsV4J_czBPj80Jm0PQnzeRVq3h7BObB/view?usp=drivesdk)