Beginner
10 min

Create the perfect climate for your success with ENS210 and PIC18F27K42

Be in sync with nature's rhythm

Temp&Hum 6 Click with EasyPIC v8

Published Nov 01, 2023

Click board™

Temp&Hum 6 Click

Development board

EasyPIC v8

Compiler

NECTO Studio

MCU

PIC18F27K42

We help you measure, manage, and master your environment, ensuring that your surroundings are in harmony with your needs and goals

A

A

Hardware Overview

How does it work?

Temp&Hum 6 Click is bsaed on the ENS210, a relative humidity and temperature sensor with I²C Interface, from ScioSense. 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.

Temp&Hum 6 Click hardware overview image

Features overview

Development board

EasyPIC v8 is a development board specially designed for the needs of rapid development of embedded applications. It supports many high pin count 8-bit PIC microcontrollers from Microchip, regardless of their number of pins, and a broad set of unique functions, such as the first-ever embedded debugger/programmer. The development board is well organized and designed so that the end-user has all the necessary elements, such as switches, buttons, indicators, connectors, and others, in one place. Thanks to innovative manufacturing technology, EasyPIC v8 provides a fluid and immersive working experience, allowing access anywhere and under any

circumstances at any time. Each part of the EasyPIC v8 development board contains the components necessary for the most efficient operation of the same board. In addition to the advanced integrated CODEGRIP programmer/debugger module, which offers many valuable programming/debugging options and seamless integration with the Mikroe software environment, the board also includes a clean and regulated power supply module for the development board. It can use a wide range of external power sources, including a battery, an external 12V power supply, and a power source via the USB Type-C (USB-C) connector.

Communication options such as USB-UART, USB DEVICE, and CAN are also included, including the well-established mikroBUS™ standard, two display options (graphical and character-based LCD), and several different DIP sockets. These sockets cover a wide range of 8-bit PIC MCUs, from the smallest PIC MCU devices with only eight up to forty pins. EasyPIC v8 is an integral part of the Mikroe ecosystem for rapid development. Natively supported by Mikroe software tools, it covers many aspects of prototyping and development thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.

EasyPIC v8 horizontal image

Microcontroller Overview

MCU Card / MCU

default

Architecture

PIC

MCU Memory (KB)

128

Silicon Vendor

Microchip

Pin count

28

RAM (Bytes)

8192

Used MCU Pins

mikroBUS™ mapper

NC
NC
AN
NC
NC
RST
NC
NC
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
NC
NC
PWM
NC
NC
INT
NC
NC
TX
NC
NC
RX
I2C Clock
RC3
SCL
I2C Data
RC4
SDA
NC
NC
5V
Ground
GND
GND
2

Take a closer look

Schematic

Temp&Hum 6 Click Schematic schematic

Step by step

Project assembly

EasyPIC v8 front image hardware assembly

Start by selecting your development board and Click board™. Begin with the EasyPIC v8 as your development board.

EasyPIC v8 front image hardware assembly
Rotary B 2 Click front image hardware assembly
MCU DIP 28 hardware assembly
EasyPIC v8 28pin-DIP - upright/background hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
NECTO Compiler Selection Step Image hardware assembly
NECTO Output Selection Step Image hardware assembly
Necto image step 6 hardware assembly
Necto DIP image step 7 hardware assembly
Necto image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Necto PreFlash Image hardware assembly

Track your results in real time

Application Output

After pressing the "FLASH" button on the left-side panel, it is necessary to open the UART terminal to display the achieved results. By clicking on the Tools icon in the right-hand panel, multiple different functions are displayed, among which is the UART Terminal. Click on the offered "UART Terminal" icon.

UART Application Output Step 1

Once the UART terminal is opened, the window takes on a new form. At the top of the tab are two buttons, one for adjusting the parameters of the UART terminal and the other for connecting the UART terminal. The tab's lower part is reserved for displaying the achieved results. Before connecting, the terminal has a Disconnected status, indicating that the terminal is not yet active. Before connecting, it is necessary to check the set parameters of the UART terminal. Click on the "OPTIONS" button.

UART Application Output Step 2

In the newly opened UART Terminal Options field, we check if the terminal settings are correct, such as the set port and the Baud rate of UART communication. If the data is not displayed properly, it is possible that the Baud rate value is not set correctly and needs to be adjusted to 115200. If all the parameters are set correctly, click on "CONFIGURE".

UART Application Output Step 3

The next step is to click on the "CONNECT" button, after which the terminal status changes from Disconnected to Connected in green, and the data is displayed in the Received data field.

UART Application Output Step 4

Software Support

Library Description

This library contains API for Temp&Hum 6 Click driver.

Key functions:

  • temphum6_read_temperature - This function returns read Temperature data.

  • temphum6_read_relative_huminidy - This function returns read relative Humidity data.

  • temphum6_get_part_id - This function returns the device part id.

Open Source

Code example

This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.

/*!
 * \file 
 * \brief TempHum6 Click example
 * 
 * # Description
 * This application emasures temperature and humidity.
 *
 * The demo application is composed of two sections :
 * 
 * ## Application Init 
 * Initialization driver init and reset device and read Part ID
 * 
 * ## Application Task  
 * Reads Temperature and Huminidy data and logs this data to USBUART every 1sec.
 * 
 * 
 * \author MikroE Team
 *
 */
// ------------------------------------------------------------------- INCLUDES

#include "board.h"
#include "log.h"
#include "temphum6.h"

// ------------------------------------------------------------------ VARIABLES

static temphum6_t temphum6;
static log_t logger;

// ------------------------------------------------------ APPLICATION FUNCTIONS

void application_init ( void )
{
    log_cfg_t log_cfg;
    temphum6_cfg_t cfg;
    uint16_t part_id;

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, "---- Application Init ----" );

    //  Click initialization.

    temphum6_cfg_setup( &cfg );
    TEMPHUM6_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    temphum6_init( &temphum6, &cfg );

    temphum6_reset( &temphum6 );
    
    part_id = temphum6_get_part_id( &temphum6 );
    if ( part_id == TEMPHUM6_PART_ID )
    {
        log_printf( &logger, "Device OK - read ID is OK  0x%x\r\n", part_id );
    }
    else
    {
        log_printf( &logger, "Device ERROR - read ID is NOT OK 0x%x\r\n", part_id  );
        for ( ; ; );
    }
}

void application_task ( void )
{
    //  Task implementation.

    float temp;
    float hum;

    temp = temphum6_read_temperature( &temphum6, TEMPHUM6_TEMP_IN_CELSIUS );
    log_printf( &logger, "Temperature is %.2f C\r\n", temp );
    
    hum = temphum6_read_relative_huminidy( &temphum6 );
    log_printf( &logger, "Huminidy is %.2f %%RH\r\n", hum );
    
    log_printf( &logger, "------------------\r\n");
    Delay_ms( 1000 );
}

void main ( void )
{
    application_init( );

    for ( ; ; )
    {
        application_task( );
    }
}

// ------------------------------------------------------------------------ END

Additional Support

Resources