Working voltage: 1.7V3.6V Working temperature: -40 ℃ ~ + 85 ℃ Communication interface: 12C (up to 3.4 MHz) and SPI (3 and 4 wires, up to 10 MHz) Humidity, pressure and gas sensors can be enabled / disabled individually The current consumption at 1 Hz humidity and temperature is 2.1 LA, the current consumption at 1 Hz pressure and temperature is 3.1 LA, and the current consumption at 1 Hz humidity, pressure and temperature is 3.7 LA Gas sensor parameters: response time (33-63%) <1s (for new sensors) power consumption in ultra-low power mode <0.1 mA output data processing direct indoor air quality (IAQ) index output humidity sensor parameters: response time (0 -83%) ~ 8s Accuracy tolerance ± 396r .. Hysteresis ± 1.5% r.h. Pin definition vCC: Power supply is positive GND: ground SCL: 12C / SP1 clock line SDA: 12C / SP Data cable sDO: SPI data cable CS: SPI1 slave enable