Feature #591
Updated by Hammel almost 5 years ago
Door sensor devices need to be self contained with no more than 2 AAA's or, better, one CR-type battery. A CR123A or CR2 would be ideal. See this "discussion on battery selection":http://www.sensorsmag.com/components/a-practical-guide-to-battery-technologies-for-wireless-sensor-networking, and this "discussion on battery cell types":http://batteryuniversity.com/learn/article/types_of_battery_cells. See this "Build WiFi Gadgets using ESP8266":https://www.youtube.com/watch?v=fXs99u6AcWc for a demonstration of how much power an ESP8266 really draws and how long it might last given proper use of sleep modes.