The site doc.px4.io is not working is there any other site where i can have the documentation on pixhawk for qgroundcontroller please
Are you sure that it is docs.px4.io and not doc.px4.io?
However, I think you can have an offline version of documentation Contributing to Documentation | PX4 Guide (main)
It is ok i have use a vpn and it is working well. I am in cameroon