My First Homemade PCB (or: Why Next Time I'm Ordering My PCB Online)
About three weeks ago, I helped Mike making a smart mailbox. If you haven't read his post already, it is a very nice one! Go on »
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 »