ENS160+AHT21 sensing module combines advanced CO2, eCO2, VOC, and TVOC detection with temperature and humidity sensing to deliver precise realtime air assessment for indoor environments. Low power design and microcontroller compatibility enable seamless integration and allow replacing the CCS811 without hardware modifications. Compact form factor for spaceconstrained installations and resistance to humidity and silicone support longterm reliability in diverse environments. Ideal for home automation, HVAC systems, agricultural controls, and projects that require accurate air and climate data. Use scenarios Smart home air quality monitoring and automation: monitor CO2, eCO2, VOC, and TVOC levels along with temperature and humidity to drive ventilation control, air purification, or alerts, enhancing comfort and indoor air quality. Building HVAC optimization: use realtime air metrics to adjust fans, dampers, or filtration in commercial or residential HVAC systems for better comfort and energy efficiency. Greenhouse and controlled agriculture: track CO2, humidity, and temperature to maintain growing conditions, automate vents, fans, and irrigation accordingly. Key attributes Function: detects CO2, eCO2, VOC, TVOC; measures temperature and humidity for comprehensive air and climate data. Compatibility: MCUfriendly; replaces CCS811 without hardware modifications. Size and form: compact design suitable for spaceconstrained installations. Material and reliability: resistance to humidity and silicone environments, supporting longterm reliability. Performance: provides precise, realtime air quality data to support informed control decisions and automation.