SparkFun

SparkFun MicroMod Environmental Function Board

Name: SparkFun MicroMod Environmental Function Board
Brand: SparkFun
SKU: SF-SEN-18632
Price: 327.25 AUD
Availability: InStock

All Products Breakouts Gas & Air Quality Sensors Humidity Sensors New Arrivals Sensors SparkFun Brands and Manufacturers Environmental (temperature, humidity, air quality) Sensors & Modules Sensors & Input Prototyping & Wiring Microcontrollers

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The SparkFun MicroMod Environmental Function Board adds additional sensing options to the MicroMod Processor Boards. This Function Board includes three senso...

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The SparkFun MicroMod Environmental Function Board adds additional sensing options to the MicroMod Processor Boards. This Function Board includes three sensors to monitor air quality (SGP40), humidity & temperature (SHTC3), and CO2 concentrations (STC31) in your indoor environment. To make it even easier to use, all communication is over the MicroMod's I2C bus!

The SGP40 measures the quality of the air in your room or house. The SGP40 uses a metal oxide (MOx) sensor with a temperature controlled micro hotplate and provides a humidity-compensated volatile organic compound (VOC) based indoor air quality signal. Both the sensing element and VOC Algorithm feature an unmatched robustness against contaminating gases present in real world applications enabling a unique long term stability as well as low drift and device to device variation.
The SHTC3 is a highly accurate digital humidity and temperature sensor. The SHTC3 uses a capacitive humidity sensor with a relative humidity measurement range of 0 to 100% RH and bandgap temperature sensor with a temperature measurement range of -40°C to 125°C. The SHTC3 builds on the success of their SHTC1 sensor with higher accuracy (±2% RH, ±0.2°C) than its predecessor, enabling greater flexibility.
The STC31 measures CO2 concentrations based on thermal conductivity and has two CO2 measurement ranges: 0 to 25 vol%; and 0 to 100 vol%. The measurement repeatability is 0.2 vol%, with a stability of 0.025 vol% / °C. The measurement accuracy depends on the measurement range: 0.5 vol% + 3% measured value; 1 vol% + 3% measured value. Using measurements from the SHTC3, the STC31 is able to provide humidity-compensated measurements together with improved temperature compensation. The STC31 can compensate for atmospheric pressure too - which is handy if, like us, you’re up in the mountains!

The outstanding performance of these three sensors is based on Sensirion’s patented CMOSens® technology, which combines the sensor element, signal processing, and digital calibration on a small CMOS chip. The well-proven CMOS technology is perfectly suited for high-quality mass production and is the ideal choice for demanding and cost-sensitive OEM applications.

Utilizing our handy M.2 MicroMod connector, no soldering is required to connect it to your system. Simply match up the key on your processor and function board's beveled edge connector to their respective key on the M.2 connector, then secure them to the main board with screws. The MicroMod Environmental Function Board can then be read via the I2C port. The board is equipped with the AP2112 3.3V voltage regulator, I2C pull-up resistors, power LED, jumper to disable the LED, and jumpers for alternative STC31 addresses.

Note: A MicroMod Processor and Main Board are not included with this MicroMod Environmental Function Board. These boards will need to be purchased separately.

MicroMod is a modular interface ecosystem that connects a microcontroller “processor board” to various “carrier board” peripherals. Utilizing the M.2 standard, the MicroMod standard is designed to easily swap out processors and function boards on the fly. Pair a specialized carrier board for the project you need with your choice of compatible processor!

Get Started with the MicroMod Environmental Function Board

Features:

Input voltage range
- 2.5V to 6.0V
  - Typ. 5V via Main Board's USB connector
  - Typ. ~3.7V to 4.2V via Main Board's LiPo battery Connector
I/O voltage
- 3.3V
AP2112 3.3V voltage regulator (rated 600mA)
Power LED
I2C pull-up resistors
Sensirion SGP40 Air Quality Sensor
- Uses I2C interface
  - Address: 0x59 (default)
- Operating voltage range
  - 1.7V to 3.6V (Typ. 3.3V)
- Operating temperature range
  - -20°C to +55°C
- Typical current consumption
  - 2.6mA during continuous operation (at 3.3V)
  - 34µA when idle (heater off)
- Output signal
  - Digital raw value (SRAW): 0 - 65535 ticks
  - Digital processed value (VOC Index): 0 - 500 VOC index points
- Switch-on behavior
  - Time until reliably detecting VOC events: <60s
  - Time until specifications are met: <1h
- Recommended sampling interval
  - VOC Index: 1s
  - SRAW: 0.5s - 10s (Typ. 1s)
Sensirion SHTC3 Humidity and Temperature Sensor
- Uses I2C interface
  - Address: 0x70 (default, non-configurable)
- Operating voltage range
  - 1.62V - 3.6V (Typ. 3.3V)
- Operating temperature range
  - -40°C to +125 °C
- Relative Humidity
  - Measurement range: 0% to 100%
  - Typical accuracy: ±2 %RH
  - Resolution: 0.01 %RH
- Temperature
  - Measurement range: -40°C to +125 °C
  - Typical accuracy: ±0.2 °C
  - Resolution: 0.01 °C
- Typical current consumption (varies based on mode)
  - 4.9µA to 430µA (Normal Mode)
  - 0.5µA to 270µA (Low Power Mode)
- Allows the STC31 to compensate for humidity and temperature
Sensirion STC31 CO2 Sensor
- Uses I2C interface
  - Addresses: 0x29 (default), 0x2A, 0x2B, 0x2C
- Operating voltage range
  - 2.7V to 5.5V (Typ. 3.3V)
- Operating temperature range
  - -20 °C to +85 °C
- Calibrated for CO2 in N2 and CO2 in air
- Measurement ranges
  - 0 to 25 vol% in N2
  - 0 to 100 vol% in air
- Accuracy
  - 0.5 vol% + 3% measured value in N2
  - 1 vol% + 3% measured value in air
- Concentration and temperature resolution: 16-bit
- Repeatability: 0.2 vol%
- Temperature stability: 0.025 vol% / °C
- Start-up time: 14 ms
- Thermal conductivity sensor provides calibrated gas concentration and temperature output
Jumpers
- PWR LED
- I2C pull-up resistors
- STC31 address selection

Note: The I2C addresses that are reserved for each sensor is 0x59 (SGP40), 0x70 (SHTC3), 0x29 (STC31). A multiplexer/Mux is required to communicate to multiple SHTC3 sensors on a single bus. The SHTC3 uses the same address as the Qwiic Mux (0x70). For advanced users that are using multiple SHTC3's with the Qwiic Mux, you will need to adjust the Qwiic Mux's default address.

Documents:

Hardware Documentation:

Schematic
Eagle Files
Board Dimensions
Hookup Guide
SGP40
SHTC3
- SHTC3 Datasheet
STC3X
Arduino Libraries
- SGP40
- SHTC3
- STC3X
GitHub Hardware Repo

MicroMod Documentation:

Videos

Jargon buster

Plain-language definitions for the technical terms used above.

CMOSens: CMOSens is Sensirion’s integrated sensor technology that combines sensing elements and electronics in one package. It matters because it affects how the sensor measures temperature and humidity and how it is supported by the manufacturer’s libraries and datasheets.
I2C: I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
LED: A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
LiPo: A lithium polymer rechargeable battery commonly used in portable electronics projects. It matters because LiPo batteries need correct charging circuitry and care, and this board includes hardware intended for that battery type.
M.2: A compact edge-connector format commonly used to plug small modules into a carrier board without soldering. On this product it is the physical connector used by the MicroMod system, so compatibility with the matching processor board is important.
microcontroller: A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
MicroMod: A modular board system where a small processor board plugs into a separate carrier board that provides connectors, power, and peripherals. It matters because this carrier board needs a compatible MicroMod processor board before it can run your project code.
multiplexer: A multiplexer is a chip or board that lets one controller switch between several devices that would otherwise conflict on the same bus. It matters here because multiple modules with the same I2C address cannot normally share one I2C bus without extra hardware.
Qwiic: Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
Temperature compensation: Temperature compensation means the sensor adjusts its readings to reduce errors caused by changes in water temperature. This matters for field monitoring because ponds, rivers, and tanks can vary in temperature throughout the day and across seasons.
VOC: Volatile organic compounds are gases released from things like paints, cleaners, smoke, and some plastics. A VOC reading helps indicate indoor air quality, but it is usually an index or estimate rather than a direct identification of each chemical.