ESP8266 NodeMCU Door Status Monitor with Email Notifications (IFTTT) | Random Nerd Tutorials
NodeMCU based door sensor with power sleep mode.
Making a simple door sensor from ESP8266 - John's Tech Blog
Easy battery powered Mailbox Door IoT sensor using ESP32 ← ABrandão.com
ESP32 Low Power Device Design - Part 1 - Squix - TechBlog
Register state changes of Reed switch - Jobs and Paid Consultancy - Arduino Forum
Window/Door Sensor - battery powered with relay or FET for backup - Project Guidance - Arduino Forum
IoT Door Sensor Reed Switch based Security System using Nodemcu
GitHub - 8n1/ESP8266-Tiny-Door-and-Window-Sensor: Battery powered door and window sensor with ultra low standby power. Arduino, ESP-12, Reed switch, ATtiny, LDO
ESP8266 Deep Sleep with Arduino IDE (NodeMCU) | Random Nerd Tutorials
ESP 8266 Mailbox Notifier using DeepSleep and Blynk
DIY low powered esp8266 door/window/mailbox sensor - Share your Projects! - Home Assistant Community
One ESP8266, One Battery, One Year… And Counting. | Hackaday
ESP8266 Voltage Regulator For LiPo and Li-ion Batteries | Random Nerd Tutorials
Troubleshooters Needed ESP8266 MailBox Notify - Need Help With My Project - Blynk Community
Building the Hardware | DIY ESP8266 Home Security with Lua and MQTT | Adafruit Learning System
Battery Powered ESP-01 Temperature Sensor - Technology Spy
ESP8266 as Window Sensor with years of battery life - YouTube
Battery-Powered ESP8266 Sensor? Never Been Simpler | Hackaday
ESP 8266 Mailbox Notifier using DeepSleep and Blynk
Esp01 Battery drain deepsleep - Everything ESP8266
Battery Powered Shed Door & Lock Sensor, Solar, ESP8266, ESP-Now, MQTT : 4 Steps (with Pictures) - Instructables
