Hello
Thank you for your job for our product and for your confident!
Welcome your technical questions!
Daivid is our sales,he must be very busy at his job.
Best Regards
Woody
Hello Morris
ZeroTech use RS232 USB-serial cable,not TTL cable.
Please use 32 bit windows system for PC GCS.
Any questions can be skype to me: support.zerouav
ZeroTech