printQrcodeByESC
时间: 2023-08-15 09:05:39 浏览: 62
您可以使用以下代码来通过ESC指令打印二维码:
```python
import qrcode
import serial
def print_qrcode_by_esc(data, printer_port):
# Generate QR code image
qr = qrcode.QRCode(version=1, error_correction=qrcode.constants.ERROR_CORRECT_L, box_size=6, border=2)
qr.add_data(data)
qr.make(fit=True)
qr_img = qr.make_image()
# Convert image to ESC/POS commands
esc_pos_data = bytearray()
esc_pos_data += b'\x1d\x28\x6b\x03\x00\x31\x43\x08' # Set QR code size
esc_pos_data += b'\x1b\x58\x31\x00' # Select QR code model 1
esc_pos_data += b'\x1b\x4d\x31' # Set QR code error correction level L
esc_pos_data += b'\x1b\x6b\x61\x02' # Print QR code
qr_bytes = qr_img.tobytes()
esc_pos_data += qr_bytes
# Send ESC/POS commands to the printer
with serial.Serial(printer_port, 9600, timeout=1) as ser:
ser.write(esc_pos_data)
# Example usage
data = "https://www.example.com"
printer_port = "/dev/ttyUSB0" # Replace with the actual printer port
print_qrcode_by_esc(data, printer_port)
```
请确保您已经安装了 `qrcode` 库来生成二维码,并且已经连接了支持ESC/POS指令的打印机,并将正确的打印机端口传递给 `printer_port` 变量。
相关推荐
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![docx](https://img-home.csdnimg.cn/images/20210720083331.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)