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July 8, 2023 19:09
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Connect to a WiFi networks using a QR code
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| import re | |
| import cv2 | |
| import subprocess | |
| pat = re.compile(r'^WIFI:S:([^;]+);T:WPA;P:([^;]+);;') | |
| detect = cv2.QRCodeDetector() | |
| cv2.namedWindow("preview") | |
| vc = cv2.VideoCapture(0) | |
| rval, frame = vc.read() | |
| while rval: | |
| cv2.imshow("preview", frame) | |
| rval, frame = vc.read() | |
| value, points, straight_qrcode = detect.detectAndDecode(frame) | |
| if value: | |
| print(value) | |
| if mat := pat.match(value): | |
| ap, pwd = mat.groups() | |
| print(f'Connecting to {ap} (password: {pwd})') | |
| subprocess.check_call( | |
| ['nmcli', 'd', 'wifi', | |
| 'connect', ap, | |
| 'password', pwd]) | |
| break | |
| key = cv2.waitKey(20) | |
| if key == 27: # exit on ESC | |
| break |
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