code_scanner

备注

This module is only applicable to the CoreS3 Controller

code_scanner module for qrcode scanning recognition

Micropython Example

qrcode detect

# SPDX-FileCopyrightText: 2024 M5Stack Technology CO LTD
#
# SPDX-License-Identifier: MIT
import os, sys, io
import M5
from M5 import *
import camera
import code_scanner
import image


img = None
qrcode = None

def setup():
    global img, qrcode
    M5.begin()
    Widgets.fillScreen(0x222222)
    camera.init(pixformat=camera.RGB565, framesize=camera.QVGA)
    camera.set_hmirror(False)

def loop():
    global img, qrcode
    M5.update()
    img = camera.snapshot()
    qrcode = code_scanner.find_qrcodes(img)
    if qrcode:
        print(qrcode.payload())
        print(qrcode.type_name())
        img.draw_string(10, 10, str(qrcode.payload()), color=0x3333ff, scale=2)
    M5.Lcd.show(img, 0, 0, 320, 240)

if __name__ == '__main__':
    try:
        setup()
        while True:
            loop()
    except (Exception, KeyboardInterrupt) as e:
        try:
            from utility import print_error_msg
            print_error_msg(e)
        except ImportError:
            print("please update to latest firmware")

UIFlow2.0 Example

qrcode detect

qrcode_detect_example.m5f2

Methods

code_scanner.find_qrcodes(img: image.Image) → image.qrcode

QR code recognition

• img Image to be recognized

Returns image.qrcode instance

UIFlow2.0

class image.QRCode

QRCode The QRCode object is returned by code_scanner.find_qrcodes(img: image.Image).

code_scanner.payload() → str

Return the payload string of the QR code

UIFlow2.0

code_scanner.type_name() → str

Return the type of the QR code

UIFlow2.0