Monitor current consumption in industrial machines and equipment
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Hardware Overview
How does it work?
Current 14 Click is based on the BM14270 (BM14270AMUV-LB), a magnetic current sensor IC from ROHM Semiconductor. Engineered for long-term support in the industrial market, this coreless, non-contact current sensing solution uses a magnetic MI (Magnetic Impedance) sensor, enabling accurate current measurement with minimal power loss. Its non-invasive design allows it to measure current flowing through a conductor without direct contact, making it both efficient and adaptable for various applications. This Click board™ is an ideal solution for scenarios requiring accurate current monitoring without introducing additional load or loss into the circuit, providing robust support in demanding environments. Current 14 Click uses a standard 2-wire I2C communication
protocol to enable the host MCU to control the TSC1641. The I2C interface supports clock frequencies up to 400kHz, with the I2C address selectable via the ADDR SEL jumper. Data output is provided through a 14-bit digital format via the I2C interface, delivering high precision in current detection. The sensor’s magnetic measurable range extends to ±280μT (typical), with a magnetic sensitivity of 0.045μT/LSB, allowing for fine-tuned and reliable measurements across various applications. This capability particularly benefits industrial equipment monitoring, power measurement meters, uninterruptible power supplies (UPS), and power conditioning systems. This Click board™ also includes an alert interrupt pin, ALR, as a data-ready indicator. In addition to
the standard interface pins, the ALR pin signals when new measurement data is available, streamlining the data acquisition process and ensuring timely updates for the host MCU. This feature enhances the board’s responsiveness in real-time monitoring applications, making it particularly effective for dynamic systems where precise and immediate current data is essential. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this 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.
Features overview
Development board
Curiosity PIC32 MZ EF development board is a fully integrated 32-bit development platform featuring the high-performance PIC32MZ EF Series (PIC32MZ2048EFM) that has a 2MB Flash, 512KB RAM, integrated FPU, Crypto accelerator, and excellent connectivity options. It includes an integrated programmer and debugger, requiring no additional hardware. Users can expand
functionality through MIKROE mikroBUS™ Click™ adapter boards, add Ethernet connectivity with the Microchip PHY daughter board, add WiFi connectivity capability using the Microchip expansions boards, and add audio input and output capability with Microchip audio daughter boards. These boards are fully integrated into PIC32’s powerful software framework, MPLAB Harmony,
which provides a flexible and modular interface to application development a rich set of inter-operable software stacks (TCP-IP, USB), and easy-to-use features. The Curiosity PIC32 MZ EF development board offers expansion capabilities making it an excellent choice for a rapid prototyping board in Connectivity, IOT, and general-purpose applications.
Microcontroller Overview
MCU Card / MCU

Architecture
PIC32
MCU Memory (KB)
2048
Silicon Vendor
Microchip
Pin count
100
RAM (Bytes)
524288
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic

Step by step
Project assembly
Track your results in real time
Application Output
1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.

2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.

3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.

Software Support
Library Description
This library contains API for Current 14 Click driver.
Key functions:
current14_calib_offset
- This function calibrates the zero current offset value.current14_calib_resolution
- This function calibrates the data resolution at the known load current.current14_get_current
- This function reads the input current level [A].
Open Source
Code example
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.
/*!
* @file main.c
* @brief Current 14 Click example
*
* # Description
* This example demonstrates the use of Current 11 Click board by reading and
* displaying the input current measurements.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and calibrates the zero current offset and data resolution
* at 3A load current.
*
* ## Application Task
* Reads the input current measurements and displays the results on the USB UART
* approximately once per second.
*
* @author Stefan Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "current14.h"
static current14_t current14;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
current14_cfg_t current14_cfg; /**< Click config object. */
/**
* 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.
current14_cfg_setup( ¤t14_cfg );
CURRENT14_MAP_MIKROBUS( current14_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == current14_init( ¤t14, ¤t14_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( CURRENT14_ERROR == current14_default_cfg ( ¤t14 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_printf( &logger, " Calibrating zero current offset in 5 seconds...\r\n" );
log_printf( &logger, " Make sure no current flows through the sensor during the calibration process.\r\n" );
for ( uint8_t cnt = 5; cnt > 0; cnt-- )
{
log_printf( &logger, " %u\r\n", ( uint16_t ) cnt );
Delay_ms ( 1000 );
}
if ( CURRENT14_ERROR == current14_calib_offset ( ¤t14 ) )
{
log_error( &logger, " Calibrate offset." );
for ( ; ; );
}
log_printf( &logger, " Offset calibration DONE.\r\n\n" );
log_printf( &logger, " Calibrating data resolution in 5 seconds...\r\n" );
log_printf( &logger, " Keep the load current set at 3A during the calibration process.\r\n" );
for ( uint8_t cnt = 5; cnt > 0; cnt-- )
{
log_printf( &logger, " %u\r\n", ( uint16_t ) cnt );
Delay_ms ( 1000 );
}
if ( CURRENT14_ERROR == current14_calib_resolution ( ¤t14, 3.0f ) )
{
log_error( &logger, " Calibrate resolution." );
for ( ; ; );
}
log_printf( &logger, " Data resolution calibration DONE.\r\n" );
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
float current = 0;
if ( CURRENT14_OK == current14_get_current ( ¤t14, ¤t ) )
{
log_printf ( &logger, " Current: %.3f A\r\n\n", current );
}
}
int main ( void )
{
/* Do not remove this line or clock might not be set correctly. */
#ifdef PREINIT_SUPPORTED
preinit();
#endif
application_init( );
for ( ; ; )
{
application_task( );
}
return 0;
}
// ------------------------------------------------------------------------ END