Here's a few quick facts about the TJ Gen1 Prototype:

• Communicates through the headphones jack using a custom modulation scheme that I've developed (5 Symbol, double polarity, Pulse Amplitude Modulation); It allows an effective bandwidth of 13714 bps (sufficient for sending the thermal data produced by the D6T-1616L uncompressed) and much more than the Hijack project modulation scheme limitations permitted - See Project Log 3 for details
• While the overall concept was inspired by the Hijack project and the TJ Gen0 prototype still used the Hijack iOS comm. library, the TJ Gen1 Prototype is an all-together different beast that bears no relation in hardware or software architecture to the Hijack project, furthermore boasting significant performance improvements in communication and power harvesting areas
• All electronic components of the TJ Gen1 Prototype (except for the Omron D6T-1616L - which is by far most the most costly component) amount for less than $4 (@1K quantities) with further cost savings possible
• The measurable temperature range that the D6T-1616L offers (or at least the engineering sample I've tested) is from -25°C (or even less) up to just shy of 300°C