123.hp.com/setup 7855 wireless setup is easy and simple. Firstly, gather all the information like the name of the network, password for your network, and you must have a computer that is connected to your wireless network. After that, check whether the wireless router and computer are powered on, most importantly the computer must get access from the same wireless network. Secondly, power on the HP Envy Photo 7855 Setup and reach the Control panel and touch the Wireless icon over there. Now, you can see the wireless summary screen that appears.