Technical Specifications

Hardware

• Product: UltimateSensor v2
• ESP platform: ESP32-S3
• Dimensions: 107 x 56 x 41 mm
• Housing: Modular, screwless, 3D-printed enclosure
• Indoor rating: IP20, indoor use only

Connectivity

• Wi-Fi 2.4 GHz
• Bluetooth for WiFi setup (Improv)
• Ethernet
• PoE
• USB-C power

Sensors

• CO2 / temperature / humidity: Sensirion SCD41
• VOC / NOx: Sensirion SGP41
• Light intensity: BH1750
• Presence: HLK-LD2412 + standard HLK-LD2450 dual mmWave; optional LD2460 replaces LD2450
• Fast motion trigger: Panasonic EKMC1603111 PIR
• Particulate matter: optional Sensirion SPS30 module

Voice and Audio

• Built-in microphone
• Built-in speaker
• Media player entity in Home Assistant
• Standard local wake word Okay Nabu, running on the device

Detection

• LD2412: sensitive presence and micro-movement detection
• LD2450: target tracking, position and zones
• PIR: fast first motion trigger
• Optional upgrade: LD2460 replaces LD2450 and uses target 1-5 X/Y/Distance/Angle entities instead of LD2450 zones
• Range: LD2412 up to 9 m, LD2450 up to about 6 m, PIR up to 12 m
• Up to 3 tracked people; with the Room Designer 4 zones, 2 exclusion zones and 2 entry lines

Power

• USB-C
• PoE with compatible switch or injector

Software

• ESPHome firmware
• Native Home Assistant integration
• OTA firmware updates
• Configuration public on GitHub