First step was to communicate with the GM65 barcode reader. A Wemos can not read from USB, so i had to use UART. I used the Arduino library softSerial to read data from the UART bus.
https://www.arduino.cc/en/Reference/softwareSerial
When a barcode is scanned it will send the value to a remote server over a SSL connection. I used a Linux based webserver with Apache2 , MySQL and PHP.
Great project! Is this code working? If so I will work on that