"Cricket" from Things on Edge
A chance encounter on a Facebook group brought me - literally - to the Edge. I read a post in which someone mentioned the ThingsonEdge "Cricket" »
ESP 8266 Mailbox Notifier using DeepSleep and Blynk
Update July 2020 - if you're interested in creating a mailbox notifier that'll work on regular AA batteries literally for years, take a look at my »