STS35 Temperature Sensor SKU: CQRSTS35A

STS35 Temperature Sensor

Description

The STS35 temperature sensor from Sensirion gives a fully calibrated, linearized, and supply-voltage-compensated digital output and has an outstanding accuracy of up to +/–0.1Degree Celsius.

It provides an operating temperature range of -40 degree selsius to +125 degree celsius and up to 1MHz I2C communication rate. Besides, the sensor can heat up itself to dehumidify the chip, which means it can function properly in a certain level of humidity.

STS35 Chip Specification Download

Media: ST35.pdf

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Size Display

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Specifications

STS35 Temperature Sensor Board Specifications

• Operating Voltage: 2.15V to 5.5V DC;
• Heating Power Consumption: 3.6mW to 33mW;
• Output Signal: I2C;
• Measuring Range: -40 Degree Celsius to +125 Degree Celsius;
• Accuracy: Plus/Minus 0.1 Degree Celsius;
• Resolution: 0.01 Degree Celsius;
• Preheat: Less Than or Equal to 1.5ms (Typical, 0.5ms);
• Response Time: More Than 2s;
• Operating Temperature: -40 Degree Celsius to +125 Degree Celsius;
• Size: 34.5* 26.8 * 2 (mm) / 1.35 * 1.05 * 0.08 (inch);
• Mounting Hole Size: M3 (3mm); Pitch 20mm.

Ocean Interface Cable Specifications

• Cable specifications: 22AWGMaterial: Silicone
• Withstand Voltage: Less Than 50V
• Withstand Current: Less Than 1000MA
• Length: 21cm
• Line Sequence: Black-Negative Power Supply; Red-Positive Power Supply; Green-SDA; Blue-SCL; Yellow-ADDR; Orange-RST.

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Example and Test Code

1. Arduino Connection Method

1.1 Software download link: https://www.arduino.cc/en/software

1.2 Download and Run the Test Examples

Media: code-Arduino.rar

#include "ky_STS3X.h"

/*!
 * Determine the IIC address according to the ADDR pin pulled high or low
 * ADDR pin pulled low： STS3X_IIC_ADDRESS_A   0x4A
 * ADDR pin pulled high： STS3X_IIC_ADDRESS_B   0x4B
 */
ky_STS3X sts(&Wire, STS3X_IIC_ADDRESS_B);


void setup(void)
{
    Serial.begin(9600);
    /*Wait for the chip to be initialized completely, and then exit*/
    while(sts.begin() != true){
        Serial.println("Failed to init chip, please check if the chip connection is fine. ");
        delay(1000);
    }

    /*!
     *@brief Set measurement frequency
     *@param freq: in the enum variable eFreq_t choose from e2S，e1Hz，e2Hz，e4Hz，e10Hz model
     */
    sts.setFreq(sts.e10Hz);

}

void loop() {
    Serial.print(sts.getTemperaturePeriodC());
    Serial.println(" C");
    delay(1000);
}

1.3 Experimental results

Connect the wires as above, upload the program, open the monitoring window of the software and set the baud rate to 9600; you can see the current detected ambient temperature, as shown in the figure below:

1.4 Code Description

• Repeat mode selection: You can adjust the data repeat mode by modifying the parameters in brackets; different modes correspond to different measurement times;
• Measurement time: The time required to repeat sample collection when outputting measurement data once.

• Transmission rate selection: You can adjust the data measurement rate by modifying the parameters in brackets; different modes correspond to different measurement rates. (Note: Self-heating will occur when the rate is 10HZ)

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