Mobile Device I built a Wear OS app that sends Dexcom G7 readings to Gluroo without carrying a phone
After our five-year-old was diagnosed with Type 1 Diabetes, we quickly realized how impractical it can be for a young child to keep a phone nearby all day and night just to maintain CGM sharing.
That led me to start building SweetPea, an experimental Wear OS app that connects directly to a Dexcom G7, captures the current glucose reading, and uploads it to Gluroo through a Nightscout-compatible connection.
Tonight we reached a big milestone: the collector now continues running while the watch screen is asleep and can upload over either Wi-Fi or cellular. Wi-Fi is preferred when available to help preserve battery, but cellular allows the watch to keep sharing readings when it is away from home and without a phone nearby.
We also adjusted the Bluetooth timing so the watch wakes and scans close to the next expected five-minute Dexcom cycle instead of scanning continuously. In our latest testing, it has been capturing consecutive readings and successfully delivering them to Gluroo.
The video is a live demonstration of the watch receiving a G7 reading and confirming that it was sent to Gluroo.
This is still an early experimental prototype. It is not an approved medical device, is not being relied upon for dosing or emergency alerts, and still needs much more reliability, battery, security, and long-duration testing. But it is exciting to finally see the full phone-independent path working:
Dexcom G7 → Wear OS watch → Wi-Fi/cellular → Gluroo → caregiver phone