I started this post as a Wifi Analyzer... but the more I got into it the more it became a complete handheld network analyzer for wireless as well as wired for performing basic network functions such as speed tests and pings, on up to measuring signal strength and identifying noise.
Here are the requirements:
Sounds like a Pi 3 (how to handle 5Ghz? usb wifi dongle? need external antenna? gig Ethernet NIC dongle? maybe someone knows of a better solution than the Pi?) and a 5 in touch screen, a touch interface GUI as launcher for multiple software packages, LiPo or Li-Ion and charging circuit, 3d printed ergo palm enclosure (see into my brain below).
What you think? Suggestions, ways to expand?