MAILBOX A connected mailbox using a switch, nodeMCU, and 3.7V battery. (DIR) Repository - Started: May 2024 - Status: Working-ish A switch is afixed to the side panel of a mailbox. When the mailbox cover is closed the switch is depressed. When the cover is lifted the switch is released, completing a circuit between the microcontroller's 3.3V supply and a GPIO pin set to wakeup when high. When this interupt occurs the program connects to a access point, sends a TCP and/or UDP message, and then returns to a sleep state. Development ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ WIP Bugs ---------------------------------------------------------------------- Mailbox close event sometimes does not get received. Should run tcpdump and see if host is receiving packet, but too slow to process. Lessons learned ----------------------------------------------------------------------