Companion Mode¶

Companion mode is the default and most common way to use Strimma. It reads glucose values from your CGM app's notifications.

How It Works¶

1. Your CGM app receives a glucose reading from your sensor via Bluetooth
2. The CGM app posts a notification showing the glucose value
3. Strimma reads the notification and extracts the glucose value
4. The value is processed, stored, displayed, and optionally pushed to Nightscout

graph LR
    A[CGM Sensor] -->|Bluetooth| B[CGM App]
    B -->|Notification| C[Strimma]
    C -->|Extract BG| D[Process & Store]

Strimma automatically detects whether the notification shows glucose in mmol/L or mg/dL and converts as needed. Values outside the range 51–500 mg/dL (2.8–27.8 mmol/L) are ignored.

Supported Apps¶

Strimma recognizes notifications from 50+ CGM app variants across all major manufacturers:

• Dexcom — G6, G7, ONE, D1+, Stelo (all regional variants)
• Abbott — Libre 2 / LibreLink
• CamAPS FX — all variants (mmol/L and mg/dL)
• Medtronic — Guardian Connect, MiniMed Mobile, Simplera
• Eversense — all versions including Gen12 and 365
• Third-party — xDrip+, Juggluco, Diabox
• Others — Aidex, Sinocare, Suswel, GlucoTech, OttAI

See Supported CGM Apps for the complete list.

Direction Computation¶

Strimma computes the glucose direction (trend arrow) locally rather than trusting what your CGM app reports. This ensures consistent, clinically-validated trend information regardless of which CGM app you use.

The direction uses EASD/ISPAD standard thresholds, computed from a 3-point average of recent readings. See Direction Arrows for details.

Deduplication¶

Strimma automatically ignores duplicate readings. If your CGM app updates its notification multiple times for the same reading, only the first is processed.

Does It Interfere with My CGM App?¶

No. Strimma only reads notifications — it doesn't modify them, intercept them, or affect your CGM app in any way. Your CGM app continues to work normally, including closed-loop systems like CamAPS FX or AndroidAPS.

Troubleshooting¶