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Hardware

SHT4x

High-accuracy temperature and humidity sensor

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High-accuracy, low-power I2C humidity and temperature sensor.

The SHT4x is the successor to the popular SHT3x: better accuracy, lower power and an integrated heater for condensing environments. It speaks standard I2C and is plug-and-play with Arduino, ESP32 and Raspberry Pi.

It's the pick when humidity really matters (HVAC, greenhouses, indoor comfort). Versus the BME280, it drops pressure sensing but gains humidity accuracy and stability.

Pros

  • High humidity and temperature accuracy
  • Ultra-low power
  • Integrated anti-condensation heater

Cons

  • No pressure sensing (unlike the BME280)
  • Pricier than basic sensors

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