ICYMI (In case you missed it) – the IoT Monthly Newsletter from AdafruitDaily.com went out this morning!
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Here’s a peek at the March 2025 issue…
IoT Projects
Wearables for Diabetes Monitoring
Andrew Childs designed and built a wearable for his 9 y.o. son. His son has Type 1 diabetes and an off-the-shelf monitoring system like the Apple Watch provides too many distractions for a kid – it’s just too complex. So, he built his own! The blog post details the entire build process, from requirements to prototypes to custom glass fabrication. – andrewchilds.com
Espresso Machine Water Tank Monitor
John Park’s espresso machine has a “water reservoir that’s inconvenient to check on”. To solve this, he built a “contactless remote water level meter that harnesses the power of “The INTERNET” to keep us informed without having to move all the cups, lift the lid, and peer into it like some kind of luddite!” – Adafruit Learning System
Low Power Rain Gauge
A pair of AA batteries power this low-power rain gauge. The circuitry is relatively simple, using an nRF52832 module and the Bluetooth Low Energy protocol to send rainfall data to an Android application. –HackADay
Train Tracker, Tide Tracker, and Much More!
Brian Benchoff wanted “a device that will ping the city’s API for all the bus stops near my house, and condense that into a list I can put on a small display somewhere”. The result is a small e-ink display that not only shows the next bus arrival times but also the current tide schedule, and the current weather. Like the smartwatch above, this is another really great build guide. It goes into depth, detailing the difficulties of scraping a city’s bus schedule API and digesting it with a microcontroller. – bbenchoff
IoT News and More!
Humane’s AI Pin
The main story in February was the demise of Humane’s AI pin. This has been a poor rollout for one of the first consumer-focused AIoT hardware. After a large number of bad reviews spelled danger for the AI Pin – reports of units being returned more than they are sold and battery fire concerns made headlines. This all culminated in HP acquiring Humane in February for $116 million. As part of the acquisition, AI Pins stopped functioning at February 28, 2025. If you own one of these $699 devices, there is still hope! A recent WIRED article details a group working to keep the devices online.