Temp&Hum 6 Click
PID: MIKROE‐3270
Weight: 23 g
Temp&Hum 6 click is a smart temperature and humidity sensing click board™,
packed with features that allow easy and simple integration into any design.
It measures a wide range of temperature and relative humidity values with
great accuracy. The ENS210 sensor IC used on this Click board™ is an ultraaccurate temperature and relative humidity sensor (RH), featuring very low
drift, very low power consumption, small hysteresis, and excellent long-term
stability. Thanks to its advanced logic back-end, the sensor IC can offer
measurement readings in Kelvin and %RH directly, over the I2C interface.
Temp&Hum 6 click is supported by a mikroSDK compliant library, which
includes functions that simplify software development. This Click board™
comes as a fully tested product, ready to be used on a system equipped with
the mikroBUS™ socket.
Featuring a smart and accurate temperature and humidity sensor IC, this
Click board™ represents a perfect solution for a wide range of applications
that rely on an accurate temperature and humidity measurements. By
reducing the workload off the host microcontroller (MCU), it makes software
development much simpler and faster, while reducing the power
consumption at the same time. It is a perfect choice for various consumer
and industry related applications, such as indoor weather stations,
thermostats and humidistats, microenvironment centers, respiratory therapy
applications, and similar.
How does it work?
The main component of Temp&Hum 6 click is the ENS210, a relative humidity
and temperature sensor with I²C Interface, from ams AG. This sensor IC
integrates two very accurate sensing components: temperature sensor, and
relative humidity sensor. Thanks to an integrated logic back-end section, the
IC can output calibrated readings from both sensors in human-readable
format (%RH, and K).
The ENS210 incorporates a high accuracy thermal sensor, which can
measure the temperature in the range between -40°C and 100°C while
retaining accuracy of ±0.5°C. The accuracy is even greater if the range is
narrowed down: when used over the range between 0°C and 70°C, the
typical accuracy is ±0.2°C. Also, the repeatability of the temperature
measurement is very good, in the range of ±0.1°C. The ENS210 is very
reliable. It can be used for prolonged periods of time, as it has a very low
thermal drift of only 0.005°C per year.
After the measurement has been converted by the A/D converter which uses
a relatively new hybrid-mode technology (Zoom ADC), it is fed to a logic
back-end, which applies factory-calibrated correction, and converts the raw
data into Kelvins. Note that the sensor will take some time to accommodate
to the ambient temperature, especially if the temperature changes quickly,
considering the thermal conductivity of the PCB itself. However, the Click
board™ surface is not very large, resulting in lower thermal inertia.
The humidity sensor is a capacitor-based sensor, which consists of a
humidity-sensitive large-area capacitor. The humidity-sensitive layer allows
the capacitance changes proportional to relative humidity. The capacitance
has a linear dependence on temperature, which ensures high accuracy.
However, the accuracy of the relative humidity sensor changes with the
ambient temperature, as well as with the %RH. The datasheet of the
ENS210 offers an absolute accuracy map, covering a range of different %RH
and °C values. The RH sensor accuracy varies in the range between ±2.5%
and ±5.5%, depending on the measuring conditions. This table can be used
to check the exact accuracy for some specific conditions.
After the measurement has been converted by a high-precision 2nd order
sigma-delta ADC, the logic back-end section applies the factory-calibrated
correction and converts the raw data into %RH value. Note that the
capacitor-based humidity sensors commonly suffer from a small hysteresis
that might occur if the sensor is used in very humid conditions for prolonged
periods of time. However, this hysteresis is not irreversible. The ENS210
does not exhibit a significant hysteresis effect. The datasheet specifies it to
be ±0.7 %RH in the range between 20% to 90% RH, and ambient
temperature of 25 °C.
Temp&Hum 6 click uses the I2C communication interface. It has pull-up
resistors connected to the mikroBUS™ 3.3V rail. A proper conversion of logic
voltage levels should be applied before the Click board™ is used with MCUs
operated with 5V.
Specifications
Type
Humidity,Temperature
Applications
It is a perfect choice for various consumer and industry
related applications, such as the indoor weather stations,
thermostats and humidistats, microenvironment centers,
respiratory therapy applications, and similar applications
On-board
modules
ENS210, relative humidity and temperature sensor with
I²C Interface, from ams AG
Key Features
Two high-accuracy sensors integrated on the same die,
ultra-accurate temperature data achieved by using the
zoom ADC, advanced logic back-end offers calibrated
data converted to physical units, low drift over time, high
repeatability, etc.
Interface
I2C
Input
Voltage
3.3V
Pinout diagram
This table shows how the pinout on Temp&Hum 6 Click corresponds to the
pinout on the mikroBUS™ socket (the latter shown in the two middle
columns).
Notes
Pin
Pin
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
Notes
I2C Clock
NC
6
MOSI
SDA
11
SDA
Power Supply
+3V3
7
3.3V
5V
10
NC
Ground
GND
8
GND
GND
9
GND
I2C Data
Ground
Onboard settings and indicators
Label
PWR
Name
Default
PWR
-
Description
Power LED indicator
Software support
We provide a library for the Temp&Hum 6 Click on our LibStock page, as well
as a demo application (example), developed using
MikroElektronika compilers. The demo can run on all the main
MikroElektronika development boards.
Library Description
The library initializes and defines the I2C bus driver and drivers that offer a
choice for writing data in register and reads data form register. The library
includes function for read Temperature and Relative Huminidy data and
function for read device part ID data. The user also has the function for RUN
and STOP procedure and function for reset device.
Key functions:
float temphum6_readTemperature(uint8_t tempIn) - Functions for read Temperature data.
float temphum6_readRelativeHuminidy() - Functions for read Relative Huminidy data.
void temphum6_reset() - Functions for reset device.
Examples description
The application is composed of the three sections :
System Initialization - Initializes I2C module.
Application Initialization - Initialization driver init and reset device and read Part ID.
Application Task - (code snippet) - Reads Temperature and Huminidy data and logs this data to
USBUART every 1sec.
void applicationTask()
{
char demoText[50];
float TEMP;
float HUM;
TEMP = temphum6_readTemperature(_TEMPHUM6_TEMP_IN_CELSIUS);
FloatToStr(TEMP,demoText);
mikrobus_logWrite("Temperature is ", _LOG_TEXT);
mikrobus_logWrite(demoText, _LOG_TEXT);
mikrobus_logWrite(" C", _LOG_LINE);
HUM = temphum6_readRelativeHuminidy();
FloatToStr(HUM,demoText);
mikrobus_logWrite("Huminidy is ", _LOG_TEXT);
mikrobus_logWrite(demoText, _LOG_TEXT);
mikrobus_logWrite(" %RH", _LOG_LINE);
mikrobus_logWrite("‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐", _LOG_LINE);
Delay_ms( 1000 );
}
The full application code, and ready to use projects can be found on
our LibStock page.
Other mikroE Libraries used in the example:
I2C
Additional notes and informations
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. The terminal
available in all MikroElektronika compilers, or any other terminal application
of your choice, can be used to read the message.
https://www.mikroe.com/temphum‐6‐click/2‐13‐19
