Home
A Bluetooth-only glucose monitor for the M5Stack. Your phone connects directly to the device over BLE and pushes each reading — there is no Wi-Fi, no web server and no cloud involved.
Based on M5_NightscoutMon by Martin Lukasek. The on-screen interface (main page, big-glucose page, analog clock, log) is ported from that project. xDripMon replaces its Wi-Fi / Nightscout data path with a direct Bluetooth link, so the Wi-Fi setup from the original wiki does not apply here.
- Main page — big value, trend arrow, mini-graph and a "minutes ago" box.
- Big-glucose page, analog-clock page and a log page.
- High/low alarms with yellow/red thresholds, warning and alarm sounds, and snooze on the middle button.
- Fully configured on the device — hold the middle button (on the log page) for the menu. No web configuration.
- Bluetooth icon shows the link state: blinking red = not connected, blinking blue = connecting/authenticating, steady blue = authenticated.
Chosen on first boot and changeable any time from the menu:
- xDrip (Android) — the device emulates a Mi Band 2; xDrip finds it, authenticates and pushes each reading.
- xDrip4iOS / xdripswift (iOS) — add a Bluetooth device of type M5Stack in the app.
- An M5Stack Core with 16 MB flash — Basic 2.6 / 2.7, Fire, or Core2. One firmware binary covers all three.
- A USB-C data cable (not a charge-only cable).
- To flash it, either:
- an Android phone with the M5Stack Loader app — the easiest route, no computer needed — see Install with an Android phone, or
- a computer with esptool — see Flashing from a computer.
- A phone running xDrip (Android) or xDrip4iOS (iOS).
- Any of the supported cores costs well under $100. The M5Stack Basic is the cheapest.
- The included USB cable is short; a longer data cable is handy for programming and for use as a bedside monitor.
- Core2 keeps the clock across resets (battery-backed RTC); Basic / Fire do not — see Device setup → Time & clock.
- Install with an Android phone
- Flashing from a computer
- Device setup (first boot, pages, menu)
- xDrip (Android) setup
- xDrip4iOS (iOS) setup
GPL v3. UI ported from M5_NightscoutMon (Martin Lukasek, GPL v3); Bluetooth protocol reference from xDrip and xdripswift (GPL v3).