SHT31 Temperature & Humidity (I2C)
by Sensirion / clone
SKU: PSA-CMP-SHT31
No reviews yetTypical India street price
₹180–₹400
Accurate digital climate sensor — upgrade path from DHT11/22.
Interface: I2C
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Concept
Factory-calibrated Sensirion sensor reporting °C and %RH over I2C with better stability than DHT.
A little theory
Bandgap temp + capacitive RH. CRC on readings. Address 0x44/0x45. Much faster and more reliable than one-wire DHT timing. In the classroom, treat SHT31 Temperature & Humidity (I2C) as a beginner part using I2C. Typical India street price is about ₹180–₹400. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
Adafruit_SHT31 begin(0x44); readTemperature(); readHumidity();
Classroom & project use
- Weather station pro
- Greenhouse
- Compare vs DHT22
Buying in India
Precautions
- Do not wet the sensing window
- Allow settling after soldering heat
Specifications
| Accuracy | ±0.3 °C / ±2 %RH typical |
| Bus | I2C |
| Address | 0x44 |
| Category | Sensors |
| Difficulty | Beginner |
| Voltage | 3.3–5V module |
| Interface | I2C |
Pinout
VIN | GND | SCL | SDA | ADR | ALERT
