Apollo MSR-2: mmWave and CO2 multisensor for Home Assistant
A tiny ESP32-C3 sensor with LD2410 mmWave presence, SCD4x CO2, pressure, light and UV, running open ESPHome firmware.
Photos
Photos: Apollo Automation
Key Facts
- Chip: ESP32-C3
- Presence: LD2410 mmWave
- Air: SCD4x CO2, DPS310 pressure, LTR390 light/UV
- Firmware: ESPHome (optional BLE proxy)
About This Project
The Apollo Automation MSR-2 packs presence detection and air sensing into a very small case for Home Assistant. Its open ESPHome configuration runs on an ESP32-C3 and reads an LD2410 mmWave radar for presence, an SCD4x CO2 sensor, a DPS310 pressure and temperature sensor and an LTR390 light and UV sensor, with an RGB status LED. The repo ships three YAML files: a minimal config, a BLE-proxy example used in their automated builds, and the factory image that allows easy adoption into Home Assistant. 3D files for the case are published on Printables, and support runs through the Apollo wiki and Discord.
Source & Attribution
Available as a complete kit
ESP32-C3 mmWave + CO2 multisensor
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