#149 ESP32 Deep Sleep, RTC Memory, Secret LoLin Pins

In this video, we look into the deep-sleep functionality if the ESP32, and we are interested if and how the deep sleep works, especially because the ESP32 has a so-called ultra-low power coprocessor. This fact promises new possibilities. - We will deep-sleep the ESP32 to save lots of power for our battery-operated devices - We will use three out of four sources for wake-up: o The timer o Two possibilities of external wake-ups o Touch pads - We have a look at the available (and sometimes strangely named) ESP-32 pins of the WROOM-32 module - We use RTC memory which survives deep-sleep - And we calculate, how long the ESP32 can deep-sleep compared to the ESP8266 Links: Sketches: Excel sheet: Instructables: ESP32 Deep-Sleep Details: Other ESP32 boards (from video #143): TTGO ESP32 Module ESP32 (NodeMCU type) Board ESP32 Development Board (Yellow Pins) ESP32 X-Shield ESP32 Lolin Board with LiPo ESP32 OLED Board ESP32 Board with 18650 D1 mini ESP32 board WeMos Arduino like ESP32 Board Cheapest ESP32 board (source not tested by me): WEMOS Official Store: Supporting Material and Blog Page: Github: If you want to support the channel and buy from Banggood use this link to start your shopping: (no additional charges for you) Official Wemos Store: Spiess/