Build an internet-connected pool notifier to alert the neighborhood that the pool party is underway!
In this guide, you'll use Adafruit IO and WipperSnapper firmware to build a pool party notifier that raises a flag and displays a message on an E-Ink screen. This project can be completed without programming or soldering.
When your pool is ready for guests, press a button on the Adafruit IO dashboard to send the flag up. We've also designed a 3D-printed enclosure to house the project.
You can print the enclosure or pick one up from the Adafruit shop!
This project is inspired by Bert's "SplashFlag - IoT Swimming Notification" project. We really liked this project and wanted to make it more approachable. This version of Bert's project was designed for a beginner to complete this project - there is no code, no self-hosted web services and wiring has been simplified as much as possible.
While this project can be built using our free Adafruit IO service plan, purchasing a subscription to Adafruit IO+ supports Adafruit and unlocks more data, more storage, and more feeds than our free service.
Hardware
The following hardware fasteners are required to assemble this project. The servo includes the required screws for mount it and the horn to the printed flag.
Page last edited November 05, 2025
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