Supply voltage range: 2.4 to 5.5V (typically 3.3V) RH working range: 0–99.99% RH I²C interface, communication rate up to 1 MHz, with two user-selectable addresses Operating temperature range: −40 to +125 °C RH response time: 8 seconds (tau63%) Typical accuracy: ±2% RH and ±0.3 °C Sensor model: SHT31-DIS RH response time: 0–100% RH Interface: I²C Power Pins: Vin – power input; accepts 2.5–5 V DC. Use the same voltage as your microcontroller’s logic level (e.g., 5 V for 5 V microcontrollers, 3.3 V for 3.3 V microcontrollers) GND – common ground for power and logic SCL – I²C clock pin; includes a 10 kΩ pull-up resistor to Vin SDA – I²C data pin; includes a 10 kΩ pull-up resistor to Vin ADDR – I²C address selection pin; includes a 10 kΩ pull-down resistor (default address: 0x44); connect to Vin to select address 0x45 RST – hardware reset pin; includes a 10 kΩ pull-up resistor (active by default); connect to GND to perform a hardware reset ALR – alert/interrupt output; configurable via sensor registers (refer to datasheet for setup details) Material: plastic Package Contents: 3 × SHT31-D Temperature and Humidity Sensor boards