Today I finally upgraded the snail mail notifier we've been using since 2012. The original setup (on the left) involved an Arduino Uno, ethernet shield, and a TPLink-701 router modified to run OpenWrt. There were wifi alternatives, but they were expensive at the time and this was a cheaper solution.

This newer version (on the right) involves just an Adafruit Feather HUZZAH with ESP8266 which is a board with built in wifi. Adafruit's Feather boards are arduino-compatible, so the changes in code were minor to account for the different wifi chipset.  
Chris wanted to keep the original box even though the device footprint is much smaller. Quinn helped by typing on his computer and playing with some switches I set up for him to toggle. He had a lot of fun, and now we have a smaller and less power hungry device for mail notifications.


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