How A QR Code Scanning Sensor Works - GM77 Barcode and QR Code Scanning Module - 15m/min
This video introduces DFRobot's GM77 QR Code Scanning Sensor, explaining how it works—it reads barcodes and QR codes at 15m/min, features a small size, high-efficiency recognition, a 0.3MP camera with auxiliary lights, and supports TTL-232 and USB.