Mikroelektronika d.o.o.
SKU: MIKROE-5526Environment 4 Click Board
Environment 4 Click Board
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Key Features
- Low power consumption, high accuracy, covers extended operating humidity and temperature ranges, long-term stability and lifetime, I2C interface, and more
- Based on the SHT41A-AD1B - 4th-generation high-accuracy SHT relative humidity, and a temperature sensor from Sensirion SGP41 - MOx based gas sensor from Sensirion
- Can be used for measuring relative humidity and temperature in air purifiers or demand-controlled ventilation systems
- mikroBUS: I2C Interface
Introducing the Environment 4 Click Board™ - the ultimate compact solution for measuring relative humidity and temperature, as well as indoor air quality. Our state-of-the-art board features the SHT41A-AD1B and SGP41, powerful 4th-generation sensors from Sensirion that deliver high-accuracy and I2C-configurability.
The SHT41A-AD1B offers linearized digital output and temperature/humidity accuracy up to ±0.3°C/±2%RH, and performs best within the operating range of 5-60°C and 20-80%RH. The SGP41, which features a temperature-controlled micro hotplate, provides a humidity-compensated VOC and NOx-based indoor air quality signal.
Whether you're looking to measure relative humidity and temperature in air purifiers or demand-controlled ventilation systems, the Environment 4 Click is the perfect solution. And with our mikroSDK-compliant library and fully tested product, software development has never been easier. Simply plug the Environment 4 Click into your system equipped with the mikroBUS™ socket, and you're ready to go!
How Does The Environment 4 Click Board™ Work?
The Environment 4 Click Board™ is based on the SHT41A-AD1B and SGP41, a 4th-generation high-accuracy SHT relative humidity, and a temperature sensor combined with MOx-based gas sensor from Sensirion. Based on Sensirion's proven CMOSens® Technology and longstanding experience in humidity sensing, the SHT41A-AD1B guarantees the highest precision. It covers extended operating humidity, and temperature ranges from 0 to 100%RH and from -40°C to 125°C with accuracies of ±2%RH and ±0.3°C. The SHT41A-AD1B also specialises in automotive applications, fulfilling reliability requirements such as 85°C/85%RH accelerated life tests and AEC Q100 qualification.
The SHT41A-AD1B shows the best performance when operated within the recommended average temperature and humidity range of 5-60°C and 20-80%RH. Long-term exposure to conditions outside recommended normal range, especially at high relative humidity, may temporarily offset the RH signal. After returning to the recommended average temperature and humidity range, the sensor will recover to within specifications. An additional part of this combo solution represents the SGP41, Sensirion's new MOx-based gas sensor, providing one VOC and one NOx-based indoor air quality signal.
As mentioned, the SGP41 provides two raw digital signals sensitive to most VOCs, typically present in indoor environments and oxidizing gases such as NOx or O3. This feature also makes this board well-suited for constantly monitoring the VOC and NOx situation, including potentially harmful events which humans do not perceive. The raw signals are proportional to the logarithm of the resistance of the sensing material and are processed by Sensirion's mighty Gas Index Algorithm. It can be directly used to automatically trigger the removal of indoor air gas pollutants by air treatment devices without requiring a user–device interaction.
The Environment 4 Click Board™ communicates with MCU using the standard I2C 2-Wire interface. Since both sensors for operation require only a 3.3V logic voltage level, this Click board™ also features the PCA9306 voltage-level translator from Texas Instruments. The I2C interface bus lines are routed to the dual bidirectional voltage-level translator, allowing this Click board™ to work appropriately with both 3.3V and 5V MCUs.
The Environment 4 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
SPECIFICATIONS
| Type | Environmental |
| Applications | Can be used for measuring relative humidity and temperature in air purifiers or demand-controlled ventilation systems |
| On-board modules | SHT41A-AD1B - 4th-generation high-accuracy SHT relative humidity, and a temperature sensor from Sensirion SGP41 - MOx based gas sensor from Sensirion |
| Key Features | Low power consumption, high accuracy, covers extended operating humidity and temperature ranges, long-term stability and lifetime, I2C interface, and more |
| Interface | I2C |
| Compatibility | mikroBUS |
| Click board size | M (42.9 x 25.4 mm) |
| Input Voltage | 3.3V or 5V |
PINOUT DIAGRAM
This table shows how the pinout of the Environment 4 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| NC | 1 | AN | PWM | 16 | NC | ||
| NC | 2 | RST | INT | 15 | NC | ||
| NC | 3 | CS | RX | 14 | NC | ||
| NC | 4 | SCK | TX | 13 | NC | ||
| NC | 5 | MISO | SCL | 12 | SCL | I2C Clock | |
| NC | 6 | MOSI | SDA | 11 | SDA | I2C Data | |
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | 5V | Power Supply |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1 | VCC SEL | Left | Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V |
ENVIRONMENT 4 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 3.3 | - | 5 | V |
| SHT41A Temperature Accuracy | - | ±0.3 | - | °C |
| SHT41A Relative Humidity Accuracy | - | ±2 | - | %RH |
| SGP41 Measurement Range (TVOC) | 0 | - | 1000 | ppm |
Software Support
We provide a library for the Environment 4 Click Board™ and a demo application (example), developed using MikroE compilers. The demo can run on all the main MikroE development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager(recommended), downloaded from our LibStock™ or found on MikroE Github account.
Library Description
This library contains API for the Environment 4 Click Board™ driver.
Key functions
-
environment4_sht_read_meas_hpThis function reads the temperature and humidity measurements with high precision from SHT41A device. -
environment4_sgp_exe_conditioningThis function executes conditioning command for SGP41 device by using I2C serial interface. -
environment4_sgp_meas_raw_signalsThis function measures raw signals for SGP41 device by using I2C serial interface.
Example Description
This example demonstrates using the Environment 4 Click Board™ by reading the temperature and humidity data and calculating VOC and NOx indexes.
void application_task ( void )
{
float temperature, humidity;
uint16_t comp_rh, comp_t, sraw_voc, sraw_nox;
int32_t voc_index, nox_index;
static uint8_t conditioning_num = 10;
Delay_ms ( 1000 );
if ( ENVIRONMENT4_OK == environment4_sht_read_meas_hp ( &environment4, &temperature, &humidity ) )
{
log_printf ( &logger, "rn Temperature: %.2f degCrn", temperature );
log_printf ( &logger, " Humidity: %.2f %%RHrn", humidity );
comp_rh = ( uint16_t ) ( humidity * ENVIRONMENT4_SHT_DATA_RESOLUTION /
( ENVIRONMENT4_SHT_ABS_MAX_HUM - ENVIRONMENT4_SHT_ABS_MIN_HUM ) );
comp_t = ( uint16_t ) ( ( temperature - ENVIRONMENT4_SHT_ABS_MIN_TEMP ) * ENVIRONMENT4_SHT_DATA_RESOLUTION /
( ENVIRONMENT4_SHT_ABS_MAX_TEMP - ENVIRONMENT4_SHT_ABS_MIN_TEMP ) );
if ( conditioning_num )
{
if ( ENVIRONMENT4_OK == environment4_sgp_exe_conditioning ( &environment4, comp_rh, comp_t, &sraw_voc ) )
{
conditioning_num--;
}
}
else
{
if ( ENVIRONMENT4_OK == environment4_sgp_meas_raw_signals ( &environment4, comp_rh, comp_t, &sraw_voc, &sraw_nox ) )
{
GasIndexAlgorithm_process( &voc_params, ( int32_t ) sraw_voc, &voc_index );
GasIndexAlgorithm_process( &nox_params, ( int32_t ) sraw_nox, &nox_index );
log_printf ( &logger, " VOC Index: %ldrn", voc_index );
log_printf ( &logger, " NOx Index: %ldrn", nox_index );
}
}
}
}
The full application code, and ready to use projects can be installed directly from NECTO Studio The package Manager(recommended), downloaded from our LibStock™ or found on MikroE Github account.
Other MikroE Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.Environment4
Additional Notes and Information
Depending on the development board you are using, you may need USB UART Click Board™, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroE compilers.
MIKROSDK
The Environment 4 Click Board™ is supported with mikroSDK - MikroE Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.
Environment 4 Click Board
Frequently Asked Questions
Ask a Question-
Is it easy to integrate the Environment 4 Click Board into my system?
Yes, the Environment 4 Click Board™ is supported by a mikroSDK compliant library, which includes functions that simplify software development. It also comes as a fully tested product, ready to be used on a system equipped with the mikroBUS™ socket.
-
How accurate is the Environment 4 Click Board™
The SHT41A-AD1B offers linearized digital output alongside temperature/humidity accuracy up to ±0.3°C/±2%RH. The SGP41 provides humidity-compensated VOC and NOx-based indoor air quality signal.
-
What is the main purpose of the Environment 4 Click Board?
The main purpose of the Environment 4 Click Board™ is to measure relative humidity, temperature, and indoor air quality. It can be used in applications such as air purifiers, demand-controlled ventilation systems, and many more.
-
What is the Environment 4 Click Board™?
The Environment 4 Click Board™ is a compact add-on board that combines 4th-generation SHT humidity and SGP air-quality sensing solutions from Sensirion. It features the SHT41A-AD1B and SGP41, an I2C-configurable high-accuracy relative humidity/temperature sensor combined with a MOx-based gas sensor.