Softwares to Download:

1. Install XLoader
2. Download Arduino Hex. Unzip the content of the zip file (serialcoinslot-xxxxx.zip).

Connect your arduino to PC and determine the COM Port.

Open Xloader. Select the hex file you downloaded (serialcoinslot-xxxxx.hex). Set proper Device and COM PORT. Set Baud rate: to 115200. Then click Upload.