The document describes an Environmental Sensing Instrument (ESI) created by DreQuan Riley using an Ubuntu operating system, Raspberry Pi hardware, C++, a Lepton thermal infrared camera, Arduino microcontroller, and the Robot Operating System. The ESI gathers environmental data using sensors for purposes such as personal weather forecasts, micro-climate sensing, air quality measurement, characterizing micro-climates for Zika virus risk assessment, and augmenting robotics systems with remote sensing capabilities. The ESI hardware layout includes components like a controller, gas sensors, photodiodes, a Geiger counter, GPS, weather sensors, a thermal infrared camera, color camera, touch screen, and a power system.