# ESP8266 Mailbox Monitoring System

A DIY project monitors a mailbox using WiFi and battery power. It sends email alerts when the lid is opened. Uses ESP8266 with ADC to measure voltage and deep sleep mode to save power.

https://www.hal9k.dk/postkasse-overvaagning/

#wifi #esp8266 #mail #battery #monitoring

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Canonical URL: https://qwibbit.com/q18389

Created: 2026-10-23T16:43:00.184455+00:00

Last edited: 2026-10-23T16:43:00.184455+00:00

Board: 3

Origin: Syndicated

Original source: https://www.hal9k.dk/postkasse-overvaagning/