I use POS Terminal Verifone Vx670 in my business, and I download ".vfd" file from POS Terminal using Cable Data Transmission.
I need a way for download automatically that .vfd remotly using GSM connection with SIM Card.
20 freelancer đang chào giá trung bình $1257 cho công việc này
Hi, I am an electronic engineer with major in embedded systems. I have already setup a gprs cmmunication in a POS terminal(chinese brand) 4 years ago. We can retry it together.