In episode #58 we built a sensor which uses deep sleep mode. In this video I show you how to use RTC memory which survives deep sleep mode to reduce power consumption even further.

Code: https://github.com/SensorsIot/ESP8266...
SDK Documentation: https://espressif.com/en/support/down...

Calculator to calculate running time: http://battery-life.of-things.de/batt...

Supporting Material and Blog Page: http://www.sensorsiot.org
Github: https://www.github.com/sensorsiot
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Official Wemos Store: http://s.click.aliexpress.com/e/jUzBiIq
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