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Comparison Table: BME680 vs. BME688
| Feature | BME680 | BME688 |
|---|---|---|
| Primary Focus | General Air Quality (IAQ) | Specific Gas Detection & AI |
| Gas Sensor Type | MOX (Metal Oxide) | |
| AI Integration | None (Software-based IAQ only) | Integrated AI support (BME AI-Studio) |
| Gas Detection | Broad VOCs (Volatile Organic Compounds) | VOCs + VSCs (Volatile Sulfur Compounds) |
| Gas resistance range | Standard | Extended (for better discrimination) |
| Humidity Stability | Moderate cross-sensitivity (~15-25% error) | High stability (<5% error in high humidity) |
| Software Support | Basic BSEC library | BSEC + BME AI-Studio |
| Replacement Type | N/A | Backward compatible “Drop-in” replacement |