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
https://www.hal9k.dk/postkasse-overvaagning/
#wifi #esp8266 #mail #battery #monitoring
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Categories: Notices [c6], Projects & Resources [c5]