M5Stack and M5StickC displays
The hardware name does not identify its software. A direct Nightscout monitor and an xDrip4iOS Bluetooth display use different firmware and setup.
Documented iPhone display route
- Configure xDrip4iOS to follow Nightscout, then confirm a new reading on its Home screen.
- Use the xDrip4iOS documentation’s firmware link for the exact M5Stack or M5StickC model. Follow that firmware’s installation instructions; do not flash a build for another model.
- Turn on the prepared display. In xDrip4iOS Devices, add the appropriate M5Stack or M5StickC and select Connect.
- Open Settings → Sharing and Services → M5Stack for supported display/Bluetooth settings.
- Compare the displayed value with xDrip4iOS and the Nightscout timestamp.
Direct Nightscout firmware
If your firmware fetches Nightscout over Wi-Fi, use that project’s own HTTPS URL/token configuration. It is not compatible with the Bluetooth instructions merely because the hardware looks the same. Confirm secure authenticated access before relying on it; do not weaken Pro site privacy to support obsolete firmware.
If it fails
Record the exact device and firmware. If xDrip4iOS is current but its Bluetooth display is not, check the firmware type, Bluetooth permission and connection status. If the phone is stale too, fix the Nightscout follower connection first.