SKU: SENS-3423
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Digilent Pmod HYGRO Digital Humidity and Temperature Sensor Module - I2C Interface

₹1,699.00 (Inclusive of all taxes)
Out of Stock

The Digilent Pmod HYGRO is a digital humidity and temperature sensor module featuring the Texas Instruments HDC1080 sensor, delivering high-accuracy environmental data via a standard 6-pin Pmod I2C interface for seamless integration with FPGA boards, microcontrollers, and development systems like Arduino and Raspberry Pi.

Features

  • High-Accuracy Sensing: ±2% relative humidity accuracy and ±0.2°C temperature accuracy.
  • Digital I2C Interface: Simple 2-wire communication via a standard 6-pin Pmod connector.
  • 14-Bit Resolution: Delivers precise measurement data for both humidity and temperature parameters.
  • Integrated Heating Element: Internal resistive heater for sensor diagnostics and condensation removal.
  • Daisy-Chain Capable: Features a pass-through Pmod host port for modular system expansion.

Out of stock

Description

The Pmod HYGRO utilizes the Texas Instruments HDC1080 integrated sensor chip, which combines a capacitive polymer-based humidity sensor with a band-gap temperature sensor. This digital sensor provides calibrated, linearized data outputs, eliminating the need for external signal conditioning circuits. The module is designed for low-power operation and offers excellent long-term stability, even in high-humidity environments.

Communication is handled exclusively through the I2C serial interface, making it compatible with a vast array of host controllers, including Digilent FPGA boards, Arduino, Raspberry Pi, and other 3.3V or 5V logic microcontrollers. The onboard heating element serves a dual purpose: it can be activated to verify sensor functionality or to evaporate any condensation that may form on the sensing element, ensuring reliable performance after exposure to saturated conditions.

Key Features

  • Precision HDC1080 Sensor: Provides industry-standard accuracy and stability for environmental monitoring.
  • Fully Digital Output: I2C interface delivers calibrated digital readings, simplifying system integration.
  • Condensation Management: Integrated heating element allows for recovery from high-humidity exposure.
  • Modular Pmod Form Factor: Standardized connector and compact size for easy prototyping and system design.
  • Extended Resolution Modes: Supports up to 14-bit conversion for maximum measurement detail.
  • Low Power Consumption: Optimized for battery-powered or energy-sensitive applications.
  • Developer Support: Includes comprehensive library and example code in the Digilent Resource Center.

Applications

  • Embedded System Environmental Monitoring: For climate control in FPGA-based projects, robotics, and IoT devices.
  • HVAC and Building Automation: Precise humidity and temperature data logging for system optimization.
  • Laboratory and Test Equipment: Providing stable environmental feedback in controlled experimental setups.
  • Agricultural and Greenhouse Monitoring: Tracking microclimate conditions for plant health management.
  • Consumer Electronics Prototyping: Integrating environmental sensing into wearable or portable device designs.

Technical Specifications

Sensor ICTexas Instruments HDC1080
Humidity Range0% to 100% RH
Humidity Accuracy±2% RH
Temperature Range-40°C to +125°C
Temperature Accuracy±0.2°C
Resolution14-bit (Programmable)
InterfaceI2C (6-pin Pmod Standard)
Supply Voltage3.3V (Typical via Pmod Bus)
Special FeatureIntegrated Heating Element
Connector6-pin Pmod

Frequently Asked Questions

What is the operating voltage for the Pmod HYGRO module?

The Pmod HYGRO is designed to operate at 3.3V, which is typically supplied directly from the Pmod host port on Digilent FPGA boards. Always verify the logic voltage level of your host controller, as the I2C communication lines are also at 3.3V logic levels.

How do I connect and read data from the Pmod HYGRO?

Connect the module's 6-pin Pmod connector to a compatible host port using the standard Pmod pinout. The module uses the I2C protocol. You must write software to initiate a measurement conversion on the HDC1080 chip and then read the humidity and temperature data registers over the I2C bus. Digilent provides example code in their Resource Center to get started.

What is the purpose of the integrated heating element?

The internal resistive heating element serves two main functions. First, it can be used for a self-test to verify sensor operation. Second, and more critically, it can be activated to gently heat the sensor chip to evaporate condensation that may accumulate in persistently high-humidity environments, thereby restoring measurement accuracy and sensor longevity.

Can I daisy-chain multiple Pmod HYGRO modules?

Yes, the module features a pass-through Pmod host port. This allows you to connect another Pmod module in a chain. However, for I2C devices, you must ensure each Pmod HYGRO (HDC1080) has a unique I2C address. The HDC1080 has one fixed address, so multiple identical sensors on the same bus would require an I2C multiplexer.

Is this sensor suitable for high-humidity or outdoor applications?

While the HDC1080 sensor itself is robust and includes a heating element for condensation recovery, the Pmod HYGRO module is a bare PCB without conformal coating or an IP rating. For outdoor or high-moisture industrial applications, the module should be housed in a protective enclosure that allows for adequate air circulation while shielding the electronics.

Package Includes

  • 1 x Digilent Pmod HYGRO Digital Humidity and Temperature Sensor Module

Additional Information

Weight 0.01 kg
Dimensions 11 × 8 × 1 cm