FAQ

SugarClock is free, open-source software that turns an inexpensive Ulanzi TC001 pixel clock into a dedicated glucose monitor display. It connects to Dexcom Share or Nightscout over Wi-Fi and shows the current reading on the clock's LED display.

No. SugarClock is not a medical device and should not be used to make treatment decisions. Always rely on your CGM receiver, CGM app, or blood glucose meter for dosing insulin or making medical decisions.

SugarClock works with Dexcom CGMs through Dexcom Share. It also works with CGM data sent to a Nightscout server or a similar compatible JSON API.

No. The browser installer flashes the firmware, and the clock's local settings page handles the rest. You only need the clock, a USB-C data cable, Wi-Fi details, and your CGM source information.

You can run the installer again. If the display is blank or the clock does not connect, reconnect the USB cable, select the device again, and re-flash SugarClock.

Yes, if you backed up the factory firmware before flashing SugarClock. You can restore it with the same flashing tools. The Ulanzi community also shares factory firmware images.

Yes. Install the firmware, take the clock on site, join the open SugarClock-Setup network from your phone, and open http://192.168.4.1 in Safari or Chrome. Enterprise networks are marked in the list and support PEAP or EAP-TTLS with a username and password.

Enter the identity exactly as school IT specifies: it may be user@district.org, DISTRICT\user, or a bare username. An optional CA certificate can be uploaded for server validation.

Ask IT to allow outbound HTTPS to share2.dexcom.com, shareous1.dexcom.com, api.openweathermap.org, and your Nightscout host when used, plus NTP over UDP port 123. Hotel-style browser sign-in portals are not supported; use a travel router or phone hotspot for those.

The Ulanzi TC001 has a small internal battery, but it is not designed for extended Wi-Fi and LED use. Keep it plugged into USB power for normal SugarClock operation.

Your glucose data flows from your configured data source to the clock. SugarClock stores settings locally on the device.

The clock scrolls its IP address on the LED display when it connects. You can also check your router's connected devices page or use a network scanner app on your phone.