How to Use GLYPHSENSE-SHT35: Examples, Pinouts, and Specs

The GLYPHSENSE-SHT35 (Manufacturer Part ID: GS-001) is a high-precision digital temperature and humidity sensor developed by PCBCUPID. This sensor is designed to deliver accurate and reliable measurements with a fast response time, making it ideal for a wide range of applications. Its compact design and digital I2C interface make it easy to integrate into various systems.

• Environmental monitoring systems
• HVAC (Heating, Ventilation, and Air Conditioning) systems
• Smart home devices and IoT applications
• Industrial process control
• Weather stations and agricultural monitoring

The GLYPHSENSE-SHT35 is built to provide robust performance in demanding environments. Below are its key technical details:

The GLYPHSENSE-SHT35 has a total of 4 pins, as described in the table below:

The GLYPHSENSE-SHT35 is straightforward to use in a circuit, thanks to its I2C interface. Below are the steps to integrate and use the sensor:

1. Connect the VDD pin to a 3.3V or 5V power supply.
2. Connect the GND pin to the ground of your circuit.
3. Connect the SDA pin to the I2C data line of your microcontroller.
4. Connect the SCL pin to the I2C clock line of your microcontroller.
5. Use pull-up resistors (typically 4.7 kΩ) on the SDA and SCL lines if not already present.

• Ensure the supply voltage is within the specified range (2.4V to 5.5V).
• Avoid exposing the sensor to extreme conditions (e.g., condensation or high humidity for prolonged periods) to maintain accuracy.
• Use proper decoupling capacitors (e.g., 0.1 µF) near the VDD pin to reduce noise.

Below is an example of how to use the GLYPHSENSE-SHT35 with an Arduino UNO. This code reads temperature and humidity data from the sensor and displays it on the serial monitor.

#include <Wire.h>

// I2C address of the GLYPHSENSE-SHT35 sensor
#define SHT35_ADDRESS 0x44

void setup() {
  Wire.begin(); // Initialize I2C communication
  Serial.begin(9600); // Start serial communication
  Serial.println("GLYPHSENSE-SHT35 Sensor Initialization...");
}

void loop() {
  // Send measurement command to the sensor
  Wire.beginTransmission(SHT35_ADDRESS);
  Wire.write(0x2C); // High repeatability measurement command
  Wire.write(0x06);
  Wire.endTransmission();
  
  delay(15); // Wait for measurement to complete
  
  // Request 6 bytes of data from the sensor
  Wire.requestFrom(SHT35_ADDRESS, 6);
  if (Wire.available() == 6) {
    uint16_t tempRaw = (Wire.read() << 8) | Wire.read(); // Read temperature
    Wire.read(); // Skip CRC byte
    uint16_t humRaw = (Wire.read() << 8) | Wire.read(); // Read humidity
    Wire.read(); // Skip CRC byte

    // Convert raw data to temperature and humidity
    float temperature = -45.0 + 175.0 * ((float)tempRaw / 65535.0);
    float humidity = 100.0 * ((float)humRaw / 65535.0);

    // Print results to the serial monitor
    Serial.print("Temperature: ");
    Serial.print(temperature);
    Serial.println(" °C");
    Serial.print("Humidity: ");
    Serial.print(humidity);
    Serial.println(" %RH");
  } else {
    Serial.println("Error: Unable to read data from sensor.");
  }

  delay(2000); // Wait 2 seconds before the next reading
}

1. Issue: The sensor is not responding on the I2C bus.

   • Solution: Check the wiring and ensure the SDA and SCL lines are connected correctly. Verify that pull-up resistors are present on the I2C lines.

2. Issue: Incorrect temperature or humidity readings.

   • Solution: Ensure the sensor is not exposed to condensation or extreme environmental conditions. Verify the power supply voltage is stable and within the specified range.

3. Issue: CRC errors when reading data.

   • Solution: Ensure the I2C communication speed is set to 100 kHz or 400 kHz. Check for noise on the I2C lines and use proper shielding if necessary.

• Q: Can the GLYPHSENSE-SHT35 operate at 5V logic levels?

  • A: Yes, the sensor supports a supply voltage range of 2.4V to 5.5V, making it compatible with both 3.3V and 5V systems.

• Q: How do I change the I2C address of the sensor?

  • A: The GLYPHSENSE-SHT35 supports two I2C addresses: 0x44 (default) and 0x45. The address can be changed by configuring the ADDR pin (if available) or using specific commands (refer to the manufacturer's datasheet).

• Q: What is the typical lifespan of the sensor?

  • A: The sensor is designed for long-term use in normal operating conditions. However, exposure to harsh environments may reduce its lifespan.

By following this documentation, you can effectively integrate and use the GLYPHSENSE-SHT35 in your projects. For further details, refer to the official datasheet provided by PCBCUPID.