How to connect Barcode Scanner module Automatic

Hi guys this is video How to connect devices, teach how to use Arduino, barcode reader module, QR code MH-ET LIVE Scanner V3
1. Connect the device as below.
Arduino UNO R3 - Barcode QR Code Reader Module MH-ET LIVE Scanner V3
• Pin 2 - S-TX
• Pin 3 - S-RX
- connect wire Auto in button
If any user who connects the module to the board can't press the scan button. Try a new connection method**
** Please connect the USB and Micro USB cables to the board and module first. and then connect the circuit wires to both devices **
Barcode Scanner 1D 2D QR Code Module TTL Support Arduino IDE
โมดูลสแกนอ่านบาร์โค้ด Barcode Scanner 1D 2D QR Code Module TTL รองรับ Arduino IDE
Download Code s2ins.com/prod....