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    • Renesas ZMOD4410 Indoor Air Quality Hat
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    Avnet's Renesas ZOMD4410 is an indoor air quality development tool for the Raspberry Pi.

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    Overview

    Avnet's Renesas ZMOD4410 Indoor Air Quality HAT for Raspberry Pi is an evaluation, development and quick-prototyping tool intended for professionals developing a wide variety of mains-powered and battery-powered products with indoor air quality monitoring capability. The HAT features an on-board calibrated ZMOD4410 sensor that measures the concentrations of Total Volatile Organic Compounds (TVOC) and can estimate carbon dioxide (eCO2) levels. These are important indicators for monitoring indoor air quality. All sensors are electrically and chemically (gas) tested with calibration data stored in the ZMOD4410’s built-in nonvolatile memory.

    In addition to the ZMOD4410 sensor, the HAT incorporates a Renesas HS3001 Precision Relative Humidity and Temperature Sensor, along with software-controlled status LEDs.

    In certain applications, it may be desirable to shift the ZMOD4410 sensing element’s chemical selectivity and sensitivity, or to model its operation at supply voltages other than 3.3V. The HAT facilitates this with a user-adjustable power supply; a jumper selects the default fixed 3.3V supply or one which can be set from 1.75V to 3.9V. The HAT also provides connection points to measure the ZMOD4410 current consumption. This may be useful when integrating the sensor and its software into an extended-life battery-powered product.

    Please note that algorithm libraries developed by Renesas are required to operate the ZMOD4410 sensor and convert its data into TVOC and eCO2 measurements. These algorithm libraries are not included with the HAT, but are available directly from Renesas subject to the terms and conditions of Renesas’ Software License Agreement. An application for the ZMOD4410 Software License Agreement, along with the procedure to download the algorithms and related confidential data, is available here.

    To validate the HAT’s operation and begin measuring TVOC and eCO2 “out of the box” with a Raspberry Pi solution, Avnet provides a pre-compiled test application built with those algorithm libraries that runs under the Raspberry Pi operating system (formerly Raspbian).

    Benefits:

    • Convenient Raspberry Pi HAT form factor for evaluation, development and quick prototyping of products that monitor indoor air quality
    • Detects a wide range of TVOC, from parts-per-billion to parts-per-million and provides eCO2 levels
    • Sensors are chemically tested and factory calibrated
    • On-board user-adjustable power supply option and current measurement connection points
    • Configurable alarm/interrupt output

    Applications:

    • Smart home appliances
    • Smart thermostats
    • Smart speakers
    • Smart fans
    • Smoke alarms
    • Vacuum cleaners
    • Garage openers
    • Security systems
    • HVAC
    • Air purifiers
    • Building automation

    Features

    • Convenient Raspberry Pi Hat form factor for evaluation, development and quick-prototyping of products that monitor Indoor Air Quality
    • Detects a wide range of TVOC, from parts-per-billion to parts-per-million and provides eCO2 levels
    • Sensors are chemically tested and factory calibrated
    • On-board user-adjustable power supply option and current measurement connection points
    • Configurable alarm/interrupt output
    • Supplied with pre-compiled Raspbian application
    • Renesas offers licensed downloadable compiled code, enabling a product road map of indoor air measurement innovation

    FAQs

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    Where can I get the precompiled firmware and detailed application notes for the ZMOD sensor?

    Visit www.idt.com/zmod4410 and register for a Renesas account. Then proceed to the area in the center of the page with the heading “Documentation & Downloads”. Here you will find programming information, app notes, and precompiled firmware as downloadable zip files. At the beginning of the download process, a Software License Agreement will appear. Sign it and the download process will proceed.

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    Where can I find the register map, the default values of the registers, offset addresses, etc. and details to implement the ZMOD4410 sensor?

    Renesas does not publish the internal register details because the ZMOD performs complex measurements and works best if used with their highly-optimized algorithms. Renesas provides these algorithms as downloadable, precompiled firmware at no cost – see the answer above.

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    Is the ZMOD sensor on the IAQ HAT calibrated?

    Yes, all sensors are lab-calibrated using standard gasses. Each sensor’s calibration data is programmed into its EEPROM at the factory.

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    Are there power saving modes available?

    Yes. The ZMOD4410 has three operating modes with different power levels.

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    What is the initial power-up delay until the IAQ HAT is ready to deliver stable measurements?

    Measurements are stable, and can be continuously read, 5 minutes after it is first powered up. During this time , the ZMOD sensor undergoes an internal normalization and stabilization sequence.

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    What is the operational life of the sensor?

    It is tested for a lifetime of 5 years.

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