Seeed Studio Grove AHT20 I2C Temperature and Humidity Sensor is based on the AHT20 sensor. The AHT20 is a new generation of a temperature and humidity sensor embedded with a dual-row flat and no-lead SMD package. The sensor is ideal for reflow soldering. AHT20 is equipped with a newly designed ASIC chip, an improved MEMS semiconductor capacitive humidity sensor, and a standard on-chip temperature sensor. The sensor features an I2C protocol with the Grove interface.