NodeMCU based door sensor with power sleep mode.
ESP8266 Window Sensor with OTA and Deep Sleep | PlastiBots
ESP8266 NodeMCU Door Status Monitor with Email Notifications (IFTTT) | Random Nerd Tutorials
Amazon.com: HiLetgo 1PC ESP8266 NodeMCU CP2102 ESP-12E Development Board Open Source Serial Module Works Great for Arduino IDE/Micropython (Small) : Electronics
Esp01 Battery drain deepsleep - Everything ESP8266
Building the Hardware | DIY ESP8266 Home Security with Lua and MQTT | Adafruit Learning System
ESP 8266 Mailbox Notifier using DeepSleep and Blynk
Battery-Powered ESP8266 Sensor? Never Been Simpler | Hackaday
ESP32 Low Power Device Design - Part 1 - Squix - TechBlog
Window/Door Sensor - battery powered with relay or FET for backup - Project Guidance - Arduino Forum
Register state changes of Reed switch - Jobs and Paid Consultancy - Arduino Forum
Battery Powered ESP-01 Temperature Sensor - Technology Spy
ESP8266 WIFI Relay Module 4 Channel Wireless Development Board AC-DC Switching Power Supply Board 5V ESP-12F for Arduino - AliExpress
Nodemcu external power - won't start? - Everything ESP8266
My Door Sensor (Revised Design) Breakdown and Upgrades - YouTube
One ESP8266, One Battery, One Year… And Counting. | Hackaday
ESP8266 Deep Sleep with Arduino IDE (NodeMCU) | Random Nerd Tutorials
ESP8266 Voltage Regulator For LiPo and Li-ion Batteries | Random Nerd Tutorials
arduino - Latching circuit for ESP8266 with coin cell and Reed Switch - Electrical Engineering Stack Exchange
ESP8266 NodeMCU Door Status Monitor with Email Notifications (IFTTT) | Random Nerd Tutorials
Making a simple door sensor from ESP8266 - John's Tech Blog
LEIDS - Low Energy IOT Door Sensor : 8 Steps (with Pictures) - Instructables
DIY low powered esp8266 door/window/mailbox sensor - Share your Projects! - Home Assistant Community
IoT Door Sensor Reed Switch based Security System using Nodemcu
