MIKROE-2467

        Environment click PID: MIKROE-2467   Environment click measures temperature, relative humidity, pressure and VOC (Volatile Organic compounds gases). The click carries the BME680 environmental sensor from Bosch. Environment click is designed to run on a 3.3V power supply. It communicates with the target microcontroller over SPI or I2C interface. You can use it to test your indoor air quality, to control HVAC (heating, ventilation, and air conditioning) systems, in a weather station, sports applications and more. BME680 sensor features The BME680 is as combined digital gas, humidity, pressure, and temperature sensor based on proven sensing principles. The humidity sensor provides an extremely fast response time for fast context awareness applications and high overall accuracy over a wide temperature range. The pressure sensor is an absolute barometric pressure sensor with extremely high accuracy and resolution. The integrated temperature sensor has been optimized for lowest noise and highest resolution. Its output is used for temperature compensation of the pressure and humidity sensors and can also be used for estimation of the ambient temperature. The gas sensor within the BME680 can detect a broad range of gases to measure indoor air quality for personal well being. Gases that can be detected by the BME680 include Volatile Organic Compounds (VOC) from paints (such as formaldehyde), lacquers, paint strippers, cleaning supplies, furnishings, office equipment, glues, adhesives, and alcohol. Specifications Type  Enviromental combo  Applications  Indoor air quality measurement, personalized weather station, home automation  control, measuring ambient temperature, etc.  On‐board  modules  BME680 integrated environmental sensor  Key Features  A digital 4‐in‐1 sensor with gas, humidity, pressure and temperature measurement  Interface  I2C,SPI  Input Voltage  3.3V  Click board size  S (28.6 x 25.4 mm)  Pinout diagram This table shows how the pinout on Environment click 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  CS  3  CS  TX  14  NC       Chip select    SPI clock  SCK  4  SCK  RX  13  NC    Master in slave out  MISO  5  MISO  SCL  12  SCL  I2C clock  Master out slave in  MOSI  6  MOSI  SDA  11  SDA  I2C data  Power supply  7  3.3V  5V  10  NC  +3.3V    Ground  GND  8  GND  GND  9  GND  Ground  Jumpers and settings Designator  Name  JP1  COMM.  SEL.  JP2  Default  Position  Default  Option  Description  I2C  Selecting communication with MCU between SPI  and I2C  ADDR. SEL.  Right  1  I2C address selection  JP3  COMM.  SEL.  Right  I2C  Selecting communication with MCU between SPI  and I2C  JP4  COMM.  SEL.  Right  I2C  Selecting communication with MCU between SPI  and I2C  JP5  COMM.  SEL.  Right  I2C  Selecting communication with MCU between SPI  and I2C  Right  Programming Code examples for Environment click, written for MikroElektronika hardware and compilers are available on Libstock. VOC library The Libstock page for the Environment click offers a library for temperature, humidity, and pressure readings. To get the library for air quality (VOC) measurements, visit the Bosch website and download the VOC library file for mikroC (libalgobsec.emcl). The run-in phase for VOC measuring is approximately 5 minutes. Note: Once you go to the Bosch website, you will need to read and agree with the terms of the software license agreement, before you can download the VOC library. For more information about the Environment click library, see our Libstock page. Code snippet The following code reads the procedure on the I2C bus (PIC32MX). 01 int8_t bus_read(uint8_t dev_addr, uint8_t reg_addr, uint8_t *reg_data_ptr, uint8_t data_len) 02 { 03 uint8_t *ptr = reg_data_ptr; 04 05 I2C2_Start(); 06 I2C2_Write( 0x77