This is Unwelded GY-SHT45 Digital Temperature and Humidity Sensor. The GY-SHT45 is a digital temperature and humidity sensor, a part of the Sensirion SHT4x series. Capable of providing precise measurements of temperature and humidity. Designed to operate efficiently with minimal power requirements, suitable for battery-powered applications. Typically includes on-chip calibration data for accurate readings without requiring external calibration.

Compact design for easy integration into different devices or projects. Can operate within a broad range of supply voltages. Suitable for a range of applications including environmental monitoring, weather stations, HVAC systems, and industrial automation due to its ability to measure both temperature and humidity accurately.

Power Pins: 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 – e.g. for a 5V micro like for Arduino, use 5V. For a 3.3V controller like a Raspbery Pi, connect to 3.3V GND – common ground for power and logic I2C Logic pins: SCL – I2C clock pin, connect to your microcontrollers I2C clock line. 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 to make the default I2C address 0x44. You can tie this pin to Vin to make the address 0x45 RST – Hardware reset pint. Has a 10K pullup on it to make the chip active by default. Connect to ground to do a hardware reset! ALR – Alert/Interrupt output. You can set up the sensor to alert you when an event has occurred.

Features:

1. High accuracy in temperature and humidity measurements
2. Digital output for easy interfacing
3. Low power consumption
4. I2C or SPI communication interface
5. On-chip calibration data
6. Small form factor for easy integration
7. Wide operating voltage range
8. Often used in various applications including weather stations, environmental monitoring, and industrial automation

Package Includes:

1 x Unwelded GY-SHT45 Digital Temperature and Humidity Sensor