Weathergotchi Logger Skips Smartphone App With On-Device E-Paper Display
Hardware and software engineer Michael Manning built a portable data logger called Weathergotchi that records temperature and humidity and displays the data on a 1.54-inch e-paper screen. No smartphone app is needed; the device shows a graph of past temperature changes. Manning released the circuit diagrams, firmware, and 3D-printable case files as open source on GitHub.