SHT40 Temperature & Humidity Sensor Breakout I2C Qwiic

The 7Semi SHT40 Temperature & Humidity Sensor Breakout I²C Qwiic is a compact, digital environmental sensor module designed to measure ambient temperature and relative humidity accurately. It uses the SHT40 sensor IC and provides calibrated, linearized digital outputs over the I²C bus. With a Qwiic-compatible connector for plug-and-play ease, this breakout is ideal for smart-home, IoT, HVAC, environmental monitoring, weather stations, greenhouse control, and other applications requiring reliable temperature and humidity sensing.

Technical Specifications:

• Sensor IC: SHT40
  
• Measurement Parameters: Ambient Temperature and Relative Humidity
  
• Interface: I²C, via Qwiic connector (plug-and-play)
  
• Supply Voltage: Typically 3.3V (logic-level compatible)
  
• Temperature Range: –40 °C to +125 °C
  
• Temperature Accuracy: ±0.1 °C (typical)
  
• Humidity Range: 0% to 100% RH (non-condensing)
  
• Humidity Accuracy: ±1.8% RH (typical, at 25 °C and 10–90% RH)
  
• Output Resolution: 16-bit for both temperature and humidity
  
• Data Output: Fully calibrated and linearized digital values

Features:

• High-precision temperature and humidity measurements (±0.1 °C, ±1.8% RH)
  
• Fully digital output via I²C - no analog signal conditioning required
  
• Qwiic connector for easy, solder-free connection and rapid prototyping
  
• Broad operating range for temperature and humidity - suitable for indoor and outdoor use
  
• Low power requirement - suitable for battery-powered or always-on environmental sensors
  
• Compact breakout board design - easy to integrate into embedded systems, IoT devices, and sensor nodes
  
• Suitable for use with Arduino, ESP32, STM32, Raspberry Pi, and other microcontroller platforms

Applications:

• Indoor/outdoor environmental monitoring - homes, offices, greenhouses, classrooms
  
• IoT sensor nodes for climate monitoring and data logging
  
• HVAC systems and building climate control systems
  
• Weather stations and environmental data collection
  
• Smart-home devices - thermostats, air-quality control, automated fans or ventilation
  
• Agricultural monitoring - greenhouses, plant-growth environment control
  
• Portable or wearable environmental sensors
  
• Research and lab instrumentation where accurate humidity/temperature sensing is required
  
• Embedded systems needing reliable, calibrated environmental data