---
title: indoor-air-sensor
studio: hwdev
stages: [inception, requirements, design, firmware, validation, manufacturing]
status: complete
---

# Indoor Air Quality Sensor

Battery-powered indoor air-quality sensor. Measures temperature, humidity, and CO₂. 12-month battery life on 2×AA. BLE for host connectivity.

## Goals

- 12-month battery life at 15-minute reporting cadence
- NDIR CO₂ sensor for measurement accuracy
- BLE 5 for low-power host connectivity
- FCC / CE compliance from day one
- OTA firmware updates over BLE
