SHT31 Humidity/Temp

Operating Voltage

2.15 V

Operating Voltage

5.5 V

Interface

I2C

Clock Speed

1 MHz

Humidity Accuracy

1.5 %RH

Temperature Accuracy

0.1 °C

Package

8-Pin DFN

Temperature Range

-40 °C

Temperature Range

125 °C

Supply Current Idle

0.2 µA

Supply Current Measuring

600 µA

Operates from 2.15-5.5 V (per the datasheet specs) over I2C, so it interfaces with both 3.3 V and 5 V microcontrollers.

• Accurate humidity and temperature sensing
• Environmental monitoring and HVAC
• Greenhouse / incubator control

• I2C address is 0x44 or 0x45 via the ADDR pin.
• Add SDA/SCL pull-ups if not on the module.
• Keep the sensor away from self-heating components for accurate readings.

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Community starter examples — minimal, unofficial, and provided to get you wiring fast. Verify against the manufacturer datasheet before relying on them.

// SHT31 temperature + humidity (I2C) — community starter example
#include <Adafruit_SHT31.h>

Adafruit_SHT31 sht;

void setup() {
  Serial.begin(115200);
  if (!sht.begin(0x44)) { Serial.println("SHT31 not found"); while (1) delay(10); }
}

void loop() {
  Serial.print("T="); Serial.print(sht.readTemperature()); Serial.print(" C  RH=");
  Serial.println(sht.readHumidity());
  delay(1000);
}

# SHT31 (ESP32) — community starter example
# lib: kfricke/micropython-sht31 (sht31.py on the board)
from machine import Pin, I2C
import sht31, time

i2c = I2C(0, scl=Pin(22), sda=Pin(21))
sensor = sht31.SHT31(i2c, addr=0x44)

while True:
    t, h = sensor.get_temp_humi()
    print(t, "C", h, "%")
    time.sleep(1)