SugarClock is free, open-source software that turns an inexpensive Ulanzi TC001 pixel clock (~$40) into a dedicated glucose monitor display. It connects to your Dexcom CGM (or Nightscout) over WiFi and shows your current glucose reading in big, colorful numbers 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 is a convenience display only.

SugarClock works with Dexcom CGMs (G6, G7, ONE, etc.) through the Dexcom Share feature. It also works with any CGM that sends data to a Nightscout server or similar JSON API.

Not at all! Everything is done through your web browser. You click one button to install the software, enter your Wi-Fi name and password when prompted, and you're done. After that, all settings are managed through a simple web page on the clock itself.

Don't worry! You can always start over. If something goes wrong during installation, just click the Install button again. The worst that can happen is the clock shows a blank screen — in which case you simply re-install.

Yes! If you backed up the factory firmware before flashing SugarClock, you can restore it using the same web flasher or the ESPTool utility. The Ulanzi community also shares factory firmware images that you can re-flash at any time.

The Ulanzi TC001 has a small internal battery, but it's not designed for extended battery operation with WiFi active and the LEDs lit. Keep it plugged into USB power at all times. Think of it as a plug-in desk clock.

Your glucose data flows directly from your data source to the clock over HTTPS (encrypted). The clock does not send your data to any third-party servers. Your Dexcom credentials and WiFi password are stored locally on the clock's internal memory and never leave your network.

The easiest way: the clock scrolls its IP address on the LED display when it first connects (e.g. "Visit 192.168.1.42 to setup"). You can also check your Wi-Fi router's connected devices page, or use a free network scanner app like "Fing" on your phone.