For our fourth and final design, we added a lot of new features like GPS tracking, and an SOS button. We also found a solar panel that could generate enough power, so just stuck one big solar panel instead of 2 smaller ones. We built an enclosure for the PCB and left a hole for the SOS button. 

Once the SOS is turned on, it will send an SMS message to your phone or any contact that you put in the code, with a link to the Datacake website. 

The Datacake website will show a map with the location of the visor and if the SOS is still activated or not.