Hardware Versions
This page explains the current UltimateSensor v2 lineup and how it differs from earlier hardware.
Current lineup: The regular UltimateSensor v2 is the voice-focused model with microphone, speaker, standard local wake word, extra PIR sensor, and ESP32-S3. The UltimateSensor Mini v2 is the compact ESP32-C6 model, but without microphone, speaker, local wake word, or PIR.
Current V2 Lineup
| Feature | UltimateSensor v2 | UltimateSensor Mini v2 |
|---|---|---|
| Best for | Voice assistant, larger rooms, fast PIR motion triggers | Compact spaces where voice/PIR is not needed |
| ESP platform | ESP32-S3 | ESP32-C6 |
| Microphone | Yes | No |
| Speaker / media player | Yes | No |
| Voice assistant | Yes, standard local wake word on the device | No |
| PIR sensor | Yes, Panasonic EKMC1603111 | No |
| mmWave presence | Standard HLK-LD2412 + HLK-LD2450 | Standard HLK-LD2412 + HLK-LD2450 |
| CO2 / temperature / humidity | Sensirion SCD41 | Sensirion SCD41 |
| VOC / NOx | Sensirion SGP41 | Sensirion SGP41 |
| Light sensor | BH1750 | BH1750 |
| Barometric pressure | No | No |
| Optional particulate matter | Sensirion SPS30 | Sensirion SPS30 |
| Optional radar upgrade | Replace LD2450 with LD2460 | Replace LD2450 with LD2460 |
| Connectivity | WiFi, BLE Improv provisioning, Ethernet, PoE | WiFi, BLE Improv provisioning, Ethernet, PoE, Thread (with the Thread firmware) |
| Power | USB-C or PoE | USB-C or PoE |
| Dimensions | 107 x 56 x 41 mm | 87 x 56 x 38 mm |
Important Change From Earlier Models
UltimateSensor Mini v1 includes voice-assistant hardware with local wake word support. In the current Mini v2, this is no longer the case:
- UltimateSensor v2: microphone, speaker, media player, standard local wake word support
- UltimateSensor Mini v1: microphone, speaker, media player, local wake word support
- UltimateSensor Mini v2: no microphone, no speaker, no media player, no local wake word support
If you have UltimateSensor Mini v1 with microphone and speaker, use the Mini v1 guide: UltimateSensor Mini v1 voice assistant guide.
Which One Should I Choose?
Choose UltimateSensor v2 if you want:
- Local voice assistant hardware with standard local wake word
- Speaker output, TTS, alarms, or audio feedback
- Fast PIR motion triggers in addition to mmWave presence
- The most complete feature set
Choose UltimateSensor Mini v2 if you want:
- A smaller, more discreet sensor
- Compact ESP32-C6 hardware with WiFi, Ethernet and Thread firmware builds
- CO2, VOC, lux, temperature, humidity and dual mmWave presence
- No microphone or speaker in the room