Example Code for Raspberry Pi Pico-I2C Temperature and Humidity Sensing

Hardware Preparation

• SHT40 Humidity and Temperature Sensor × 1 (Download SHT40 Library)
• Terminal Block Board For Pico × 1
• Pico Mainboard × 1

Software Preparation

Download SHT40 Library

Wiring Diagram

The Terminal Block Board: 5V (connect to) SHT40: VCC

The Terminal Block Board: GND (connect to) SHT40: GND

The Terminal Block Board: GP4 (connect to) SHT40: SCL

The Terminal Block Board: GP5 (connect to) SHT40: SDA

Sample Code

#include"DFRobot_SHT40.h"

DFRobot_SHT40 SHT40(SHT40_AD1B_IIC_ADDR); 


uint32_t id = 0;
float temperature, humidity;

void setup() {

  Serial.begin(9600);
  SHT40.begin();

  while((id = SHT40.getDeviceID()) == 0){
    Serial.println("ID retrieval error, please check whether the device is connected correctly!!!");
    delay(1000);
  }

  delay(1000);
  Serial.print("id :0x"); Serial.println(id, HEX);

}

void loop() {
  temperature = SHT40.getTemperature(/*mode = */PRECISION_HIGH);
  humidity = SHT40.getHumidity(/*mode = */PRECISION_HIGH);

  if(temperature == MODE_ERR){
    Serial.println("Incorrect mode configuration to get temperature");
  } else{
    Serial.print("Temperature :"); Serial.print(temperature); Serial.println(" C");
  }
  if(humidity == MODE_ERR){
    Serial.println("The mode for getting humidity was misconfigured");
  } else{
    Serial.print("Humidity :"); Serial.print(humidity); Serial.println(" %RH");
  }
  if(humidity > 80){

    SHT40.enHeater(/*mode = */POWER_CONSUMPTION_H_HEATER_1S);
  }
  delay(1000);

  Serial.println("----------------------------------------");
}

Result

Program description: print the temperature and humidity information read by the sensor on the serial monitor.