The S1 Pro Multi Sense and E1 Pro Multi Sense are advanced smart presence sensors designed for Home Assistant. They use mmWave radar technology to detect whether people are present in a room, even when they are sitting or standing still. Because they do not use cameras and do not rely on cloud services, all processing is done locally, ensuring strong privacy protection.
What both sensors do
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Detect real presence, not just movement
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Fully local integration with Home Assistant via ESPHome
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Measure ambient light (lux) and UV
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Support detection zones and exclusion zones
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Provide visual (LED) and audible (buzzer) feedback
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Keep all data inside your home network
Key differences
S1 Pro – simple and all-in-one
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Tracks up to 3 people simultaneously
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Connects via Wi-Fi and is powered by USB-C
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Built-in temperature, humidity, and air quality sensing (VOC and estimated CO₂)
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Compact design with flexible mounting options
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Ideal for bedrooms, home offices, and standard living spaces
E1 Pro – more powerful and flexible
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Tracks up to 5 people at the same time
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Supports Ethernet and Power over Ethernet (PoE), with optional Wi-Fi
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Can be wall-mounted or ceiling-mounted with full 360° coverage
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Focuses on presence detection, with highly accurate CO₂ available via an optional add-on
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Can function as a Bluetooth proxy for Home Assistant
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Better suited for larger rooms or more permanent installations
Which one to choose
Choose the S1 Pro if you want a compact, easy-to-install sensor with built-in air quality monitoring for everyday rooms. Choose the E1 Pro if you need wider coverage, support for more people, wired reliability, or a setup that can grow with more advanced smart home needs.
Both sensors offer a major upgrade over traditional motion sensors and enable smarter, more reliable automations while keeping everything local and private.