"Hardware" is a side quest available in Dying Light.
Tolga and Fatin have contacted you once again and they will be located at the Fisherman settlement. They want you to collect 10 power cables and 10 duct tape roles. After you give them the items they will ask you to go to the Infamy Bridge and zip line to the military setup to obtain a portable sonar system. The sonar is at the back tent and it is very close to when you enter the tent. Grab the sonar and Tolga and Fatin will tell you they do not need it any more and it completes the mission.
The military tents and police vans are full of loot, especially medkits and gauzes from inside the tents, but there are lots of biters.