Finally got all the buttons wired in and working with the built in menu system, actually I did it last year. Been working a bit on a Bluetooth smart lab air filter too. Though I'm very happy with it so far. It was may intention to try to make it as rugged and useful as possible without over loading the user. I have seen a few Tricorders in the past, but they are a rare breed. I like how this came out and hope to keep on developing it. 

Some current modifications for the newest revision is:

• A much nicer industrial style power LED
• Lots of Internal code revisions
• A newer power switch that is low profile, so you can't bump it on/off as easy
• All switches wired and working
• Cutouts on the back for better grip of the device
• Lots of field testing on the auto environment detection feature (indoor, outdoor, and vehicle) 

When I have some additional funds I plan on at least getting a nicer professional 3D printed case for it so the symbols and names show up and no layer lines. The program is up to about 6k lines of C++ at this point.

I'm finding out however I'm pushing the 12C bus a bit hare with traffic, so I'm looking into solutions. One is some type of I2C MUX chip or possibly moving to dual processors. A MUX chip may be the easiest as I can put some of the lower traffic sensors like light, temp and humidity on it. With GPS and the IMU on its own bus. Some PCB's for the main controller and sensor board will need to wait till I have some time to design them but they are high on the list so I can both reduce the thickness and overall size a bit.