HTU21D features: HTU21D, made of high-performance humidity sensor components, the sensor output standard 12C format.

At the same time, it has high temperature accuracy and humidity accuracy.

HTU21 is specially designed for low power consumption and small volume applications, with fast response speed, strong anti-interference ability, and extremely low power consumption.

Product parameters: Power supply voltage: 1.5V~3.6V Power consumption: ≤2.7uW Communication method: I2C Humidity hysteresis: ±1%RH Measuring time: 50ms Annual drift: -0.5%RH/year Humidity response time: 5 s Temperature response time: 10 s Humidity measurement range: 0-100%RH Temperature measurement range: -40C-125°C accuracy ±0.3°C Humidity accuracy range (10%RH to 95%RH): HTU21D ±2%RH BMP180 features: BMP180 is a pressure sensor with high precision, small size and ultra-low energy consumption.

It integrates piezoresistive sensors, ADC, EEPRM controller, and I2C controller.

The absolute accuracy can reach as low as 0.03hPa, and the consumption of electrodes is low.

3uA, can be directly connected to various microprocessors through the I2C bus.

Can measure air pressure and altitude parameters: Supply voltage: 1.8~3.6V Working temp: -40~85°C Communication method: IIC up to 3.4MHz Pressure range: 300~1100hPa