Wireless Barcode Scanner

2023-09-06 | By M5Stack

License: General Public License Bluetooth / BLE Wifi Arduino M5Stack M5Stick

* Thanks for the source code and project information provided by @Ahork

Software apps and online services

Sipeed Maixpy

Arduino IDE

Library ESP32-BLE-Keyboard

Story

Create a wireless Barcode scanner for your ISBN books (in the Zotero or other).

You can read the ISBN of book with camera on StickV.

Look the isbn with M5SctickV and the code will be typed on the keyboard.

It uses HID Bleutooth.

Install a ESP32-BLE-Keyboard library in the Arduion IDE:

Download ZIP : https://github.com/T-vK/ESP32-BLE-Keyboard
In IDE:

"Sketch" -> "Include Library" -> "Add.ZIP Library..." and select the file you just downloaded.

M5StickC

add the code in Arduino IDE

M5StickV

create a boot.py in the SD Card or with MaixPy Tools => "Save Open script to Board(boot.py)

Warning:

The first time you add in windows parameter add ESP 32 BLE Keyboard.

Also,

Add code for ATOMIC QR-CODE and AZERTY keyboard, only use the ATOM QR CODE in IDE Arduino:

Works with UnitV:

Grove StickC to StickV

Code

M5StickC Arduino

Code for M5SticK

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#include <M5StickC.h>
#include <BleKeyboard.h>


//reception M5StickV
HardwareSerial serial_ext(2);

//Connect HID Bluetooth
BleKeyboard bleKeyboard;

void setup() {

  M5.begin();
  M5.Lcd.setRotation(3);
  M5.Lcd.fillScreen(BLACK);
  M5.Lcd.setCursor(0, 0);
  M5.Lcd.setTextSize(2);
  M5.Lcd.println("GO");
  bleKeyboard.begin();

// Connect M5StickV
  pinMode(32, OUTPUT);
  pinMode(33, INPUT);
  serial_ext.begin(115200, SERIAL_8N1, 32, 33);
  
}

// for IBSN (Number)
void loop() {
   
    if(bleKeyboard.isConnected()) {
        
    if ( serial_ext.available() > 0 ) {
      bleKeyboard.press(KEY_LEFT_SHIFT );
      String str = serial_ext.readStringUntil('\n');
      bleKeyboard.print(str);
      bleKeyboard.releaseAll();    
      M5.Lcd.fillScreen(BLACK);
      M5.Lcd.setCursor(0, 0);
      M5.Lcd.println(str);
    }
    
}
}

ATOM QR-CODE Arduino

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/*Press button to scan, serial monitor will print information*/

#include  <M5Atom.h>
#include <BleKeyboard.h>

String AltGrazerty="~#{[|`\\^@#]}";
String shiftazerty="QBCDEFGHIJKL?NOPARSTUVZXYW1234567890 Q+QQQQM%Q./Q>";
String azerty="qbcdefghijkl,noparstuvzxyw&q\"'(-q_qq )=q$q*mqq;:!<";
const byte scancode[] = {4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,44,45,46,47,48,49,50,51,52,53,54,55,56,100};

const boolean AZERTY = true;

BleKeyboard bleKeyboard;

#define TRIG 23
#define DLED 33

const int tempo=10;
 
void Keyfr(const String &Texte){
  int j = -1;
 
  for (unsigned int i=0; i< Texte.length(); i++){
    delay(tempo);
    
    char c = Texte.charAt(i);
    
    if (c=='\t'){
      bleKeyboard.write(KEY_TAB);
    }
   
    int index = azerty.indexOf(c);
    if (index>-1){
      j = scancode[index]+136;
      bleKeyboard.write(j);
    } else{
      index = shiftazerty.indexOf(c);
      if (index>-1){
        j = scancode[index]+136;
        bleKeyboard.press(KEY_LEFT_SHIFT);
        bleKeyboard.press(j);
        bleKeyboard.releaseAll();
      }else {
        index = AltGrazerty.indexOf(c);
        if (index>-1){
          j = scancode[index+27]+136;
          bleKeyboard.press(KEY_LEFT_CTRL);
          bleKeyboard.press(KEY_LEFT_ALT);
          bleKeyboard.write(j);
          bleKeyboard.releaseAll(); 
          if (index==0 || index==7){
            // Traitement spécial pour ce caractère ~ et ^ qui sont des deads keys
            // ce qui n'est pas le cas sur les clavier qwerty
            // on le tape une seconde fois puis on fait un Retour Arrière.
            bleKeyboard.press(KEY_LEFT_CTRL);
            bleKeyboard.press(KEY_LEFT_ALT);
            bleKeyboard.write(j);
            bleKeyboard.releaseAll();
            bleKeyboard.write(KEY_BACKSPACE);
          }
        }
      }   
    }
  }
}

void Keyfrln(const String &Texte){
  Keyfr(Texte);
  bleKeyboard.write(KEY_RETURN);
}

void setup() {
  bleKeyboard.begin();
  M5.begin(false, false, true);
  Serial.begin(9600);
  Serial2.begin(9600, SERIAL_8N1, 22, 19);
  M5.dis.drawpix(0, 0x00f000);
  pinMode(TRIG, OUTPUT);
  pinMode(DLED, INPUT);
  digitalWrite(TRIG, HIGH);
}

void loop() {
  M5.update();
  if(digitalRead(39) == LOW){
    digitalWrite(TRIG, LOW);
  }else {
    digitalWrite(TRIG, HIGH);
  }
  if(digitalRead(DLED) == HIGH){
    while(Serial2.available() > 0){
      char ch = Serial2.read();
     
      if(bleKeyboard.isConnected()) 
      {        
        String phrase;
        phrase = String(phrase + ch);
        
        if (AZERTY) {
         Keyfr(phrase);
         Serial.print(phrase);
        }
        else
        {
          bleKeyboard.print(phrase );
          bleKeyboard.releaseAll();
        }    
      }      
    }
  }
}

M5StickV Python

Code for M5stickV

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import sensor
import image
import lcd
import time
from machine import I2C,UART

from fpioa_manager import fm

#uart initial
fm.register(35, fm.fpioa.UART2_TX, force=True)
fm.register(34, fm.fpioa.UART2_RX, force=True)

uart_Port = UART(UART.UART2, 115200,8,0,0, timeout=1000, read_buf_len= 4096)


clock = time.clock()
lcd.init()
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.set_vflip(1)
sensor.set_hmirror(1)
sensor.run(1)
sensor.skip_frames(20)
while True:
    clock.tick()
    img = sensor.snapshot()
    res = img.find_barcodes()
    fps =clock.fps()
    if len(res) > 0:
        data = res[0].payload()
        print(data)
        uart_Port.write(data)
        time.sleep(2)
    lcd.display(img)

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Wireless Barcode Scanner

2023-09-06 | By M5Stack

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