Mikroelektronika d.o.o.
Umgebung 3 Click Board
Umgebung 3 Click Board
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Der Environment 3 Click Board™ ist eine kompakte Zusatzplatine, die eine Vier-in-Eins-Umweltmesslösung enthält. Diese Platine verfügt über BME688, einen ersten Gassensor mit künstlicher Intelligenz (KI), und integrierte hochlineare/hochpräzise Druck-, Feuchtigkeits- und Temperatursensoren von Bosch Sensortech. Der BME688 kann flüchtige organische Verbindungen (VOCs), flüchtige Schwefelverbindungen (VSCs) und andere Gase wie Kohlenmonoxid und Wasserstoff im Bereich von Teilen pro Milliarde (ppb) erkennen. Er bietet eine absolute Temperaturgenauigkeit, typischerweise ±1 °C, und die beste Leistung beim Betrieb im Druck-, Temperatur- und Feuchtigkeitsbereich von 300–110 hPa, 0–65 °C und 10–90 % relativer Luftfeuchtigkeit. Außerdem verfügt er über eine konfigurierbare Hostschnittstelle, die sowohl SPI- als auch I2C-Seriellkommunikation unterstützt.
Das Environment 3 Click Board™ eignet sich zur Messung der Luftqualität im Innen- und Außenbereich, zur Erkennung ungewöhnlicher Gase und Gerüche sowie für verschiedene temperatur- und feuchtigkeitsbezogene Anwendungen.
How Does The Environment 3 Click Board™ Work?
The Environment 3 Click Board™ as its foundation uses the BME688, air quality MEMS sensor that combines gas, humidity, temperature, and barometric pressure sensing from Bosch Sensortech. The BME688 combines reliable high-precision sensors with wide-ranging gas detection and innovative AI capabilities, enabling users to rapidly develop various applications to improve well-being, lifestyle, and sustainability. It offers reduced power consumption, improved accuracy specifications, and a configurable host interface for the fastest data transfer. It covers extended operating pressure, humidity, and temperature ranges from 300-1100hPa, 0-100%RH and from -40°C to +85°C with the accuracy of ±3%RH and ±0.5°C.
The BME688 supports a full suite of operational modes, which provides vast flexibility in optimizing the device for power consumption, resolution, and filter performance. Additionally, it also has a gas scanner function; it can detect Volatile Organic Compounds (VOCs), Volatile Sulfur Compounds (VSCs), and other gases such as carbon monoxide and hydrogen in part per billion (ppb) range. In standard configuration, the presence of VSCs is being detected as an indicator for, e.g., bacteria growth, where the gas scanner can be customized for sensitivity, selectivity, data rate, and power consumption.
Based on its main features listed above, this Click board is the best choice for indoor and outdoor air quality measurement applications, detection of unusual gases that might indicate leakage or fire, early detection of odors and bad smells, and other various temperature and humidity-related applications.
The Environment 3 Click Board™ allows using both I2C and SPI interfaces. The selection can be made by positioning SMD jumpers labeled as COMM SEL to an appropriate position. Note that all the jumpers' positions must be on the same side, or the Click board™ may become unresponsive. While the I2C interface is selected, the BME688 allows choosing the least significant bit (LSB) of its I2C slave address using the SMD jumper labeled as ADDR SEL to an appropriate position marked as 0 or 1.
The Environment 3 Click Board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.
BME AI-STUDIO TOOL
Bosch Sensortec's tool for the BME688 sensor, such as the BME AI-Studio Software, allows users to develop, verify, and deploy custom gas classification use-cases. It enables sensor configuration, data analysis, training, and optimization of application-specific solutions. The BME688 detects gases by measuring their unique electronic fingerprint and therefore distinguish different gas compositions, enabling a broad spectrum of new applications. Thus, the BME AI-Studio tool allows customers to train the BME688 gas scanner feature on their specific applications, like home appliances, IoT, or Smart Home solutions.
For all additional information, the users can visit the official Bosch Sensortec BME688 Software page.
SPECIFICATIONS
| Type | Environmental |
| Applications | Can be used for indoor and outdoor air quality measurement, detection of unusual gases and smells, and various temperature and humidity-related applications |
| On-board modules | BME688 - air quality MEMS sensor that combines gas, humidity, temperature, and barometric pressure sensing from Bosch Sensortech |
| Key Features | Four-in-one environmental measurement solution, wide-ranging gas detection, high-linearity, high-accuracy and precision, low power consumption, configurable host interface, and more |
| Interface | I2C,SPI |
| Compatibility | mikroBUS |
| Click board size | S (28.6 x 25.4 mm) |
| Input Voltage | 3.3V |
PINOUT DIAGRAM
This table shows how the pinout on the Environment 3 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 | ||
| SPI Chip Select | CS | 3 | CS | RX | 14 | NC | |
| SPI Clock | SCK | 4 | SCK | TX | 13 | NC | |
| SPI Data OUT | SDO | 5 | MISO | SCL | 12 | SCL | I2C Clock |
| SPI Data IN | SDI | 6 | MOSI | SDA | 11 | SDA | I2C Data |
| Power Supply | 3.3V | 7 | 3.3V | 5V | 10 | NC | |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| JP1-JP4 | COMM SEL | Right | Communication Interface Selection SPI/I2C: Left position SPI, Right position I2C |
| JP5 | ADDR SEL | Left | I2C Address Selection 0/1: Left position 0, Right position 1 |
ENVIRONMENT 3 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | - | 3.3 | - | V |
| Operating Gas Range | 0 | - | 500 | IAQ Index |
| Operating Pressure Range | 300 | - | 1100 | hPa |
| Pressure Accuracy | - | ±0.6 | - | hPa |
| Humidity Accuracy | 0 | - | 100 | %RH |
| Operating Temperature Range | - | ±3 | - | %RH |
| Temperature Accuracy | -40 | +25 | +85 | °C |
| Receiver inputs voltage range | - | ±0.5 | - | °C |
Software Support
We provide a library for the Environment 3 Click Board™ as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
The package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on MikroE Github account.
Library Description
This library contains API for the Environment 3 Click Board™ driver.
Key functions
-
environment3_get_all_dataThis function reads the temperature, humidity, pressure, and gas resistance data from the sensor. -
environment3_enable_heaterThis function enables or disables the gas sensor heater. -
environment3_soft_resetThis function soft-resets the sensor.
Example Description
This example demonstrates the use of the Environment 3 Click Board™.
void application_task ( void )
{
float temperature, pressure, humidity;
uint32_t gas_resistance;
if ( ENVIRONMENT3_OK == environment3_get_all_data ( &environment3,
&temperature,
&humidity,
&pressure,
&gas_resistance ) )
{
log_printf( &logger, " Temperature : %.2f Crn", temperature );
log_printf( &logger, " Humidity : %.2f %%rn", humidity );
log_printf( &logger, " Pressure : %.3f mBarrn", pressure );
if ( ENVIRONMENT3_ENABLE == environment3.gas_sett.enable )
{
log_printf( &logger, " Gas Resistance : %ld Ohmsrn", gas_resistance );
log_printf( &logger, "--------------------------------rn" );
}
else
{
log_printf( &logger, "--------------------------------rn" );
Delay_ms( 1000 );
}
}
}
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
Other Mikroe Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.Environment3
Additional Notes and Information
Depending on the development board you are using, you may need USB UART click, 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 MikroElektronika compilers.
Note: The BME688 gas sensor can detect Volatile Organic Compounds (VOCs) and provides ready-made data that are processed more accurately compensated. We must emphasize that our library does not allow the calculation of the VOC.
The users can visit the official Bosch Sensortec BME688 Software page for all additional information about the VOC libraries.
MIKROSDK
The Environment 3 Click Board™ is supported with mikroSDK - MikroElektronika 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.
Umgebung 3 Click Board
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