Precision module with I2C interface with an excellent relative humidity of ± 2% (0-100%RH) and an accuracy of ± 0.2 °C, valid for most uses.
Pin configuration
Vin: This is the power PIN. The Chip can use 2.5-5VDC for power. To power the board, give it the same power as the logic level of your microcontroller, for example, for a 5V micro like Arduino, use 5V. For a 3.3V controller like a Raspbery Pi, connect it to 3.3V
GND-Common
I2C Logic Pins: SCL-I2C Clock Pin, connect it to the I2C clock line of your microcontrollers. This PiN has a 10K pullup resistor to Vin
SDA-I2C data pin, connect to your microcontrollers, I2C data line. This PiN has a 10K pullup resistor to Vin
Other pins:
ADR This is the I2C address selection PIN. This PiN has a 10K pull-down resistor so that the default I2C address is 0x44. You can associate this PIN with Vin to make address 0x45
RST Hard Reset. It has a 10K pullup so the chip is active by default. Ground to do a hard reset!
ALR Alert/Interrupt output. You can set the sensor to alert you when an event has occurred. See data sheet to learn how to set up alerts