Monitor liquid flow with OPB350L250 and MK64FN1M0VDC12
Crystal-clear view into the dynamics of fluid movement within your transparent tubes
Published Nov 14, 2023
Click board™
Water Detect 2 Click
Dev Board
Clicker 2 for Kinetis
Compiler
NECTO Studio
MCU
MK64FN1M0VDC12
Our solution is designed to provide real-time, visual confirmation of liquid flow within clear tubes, ensuring precision and accuracy in fluid management.
A
A
Hardware Overview
How does it work?
Water Detect 2 Click is based on the OPB350L250, a tube liquid sensor from TT Electronics. It consists of an LED and a phototransistor, where the phototransistor reads the light of an LED that passes through a clear tube. Depending on the liquid that passes through, you can distinguish light from dark liquid, no liquid presence, bubbles in the liquid that passes through the tube, or even no tube presence at all. You will have to identify the typical current values for each situation, where the ratio between the different states allows the acknowledgment of different conditions. In addition, the sensor itself comes in an opaque
plastic housing that enhances ambient light rejection. The housing „clicks“ around the tube, allowing a secure and tight connection. Water Detect 2 Click uses the MCP6022, a rail-to-rail input/output operational amplifier from Microchip, to amplify the output of the liquid sensor. For a visual presentation of the fluid sensor status, this Click board™ has an RGB LED that uses all three colors to indicate water detection, no water detection, and the LED ON. The onboard VREF potentiometer is used for the calibration of the liquid sensor. This way, you can set the threshold for what you want to detect. Water Detect
2 Click uses an interrupt DET pin (liquid detection) to communicate with the host MCU. In addition, you can turn the LED ON/OFF over the ON pin of the mikroBUS™ socket. 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
Clicker 2 for Kinetis is a compact starter development board that brings the flexibility of add-on Click boards™ to your favorite microcontroller, making it a perfect starter kit for implementing your ideas. It comes with an onboard 32-bit ARM Cortex-M4F microcontroller, the MK64FN1M0VDC12 from NXP Semiconductors, two mikroBUS™ sockets for Click board™ connectivity, a USB connector, LED indicators, buttons, a JTAG programmer connector, and two 26-pin headers for interfacing with external electronics. Its compact design with clear and easily recognizable silkscreen markings allows you to build gadgets with unique functionalities and
features quickly. Each part of the Clicker 2 for Kinetis development kit contains the components necessary for the most efficient operation of the same board. In addition to the possibility of choosing the Clicker 2 for Kinetis programming method, using a USB HID mikroBootloader or an external mikroProg connector for Kinetis programmer, the Clicker 2 board also includes a clean and regulated power supply module for the development kit. It provides two ways of board-powering; through the USB Micro-B cable, where onboard voltage regulators provide the appropriate voltage levels to each component on the board, or
using a Li-Polymer battery via an onboard battery connector. All communication methods that mikroBUS™ itself supports are on this board, including the well-established mikroBUS™ socket, reset button, and several user-configurable buttons and LED indicators. Clicker 2 for Kinetis is an integral part of the Mikroe ecosystem, allowing you to create a new application in minutes. Natively supported by Mikroe software tools, it covers many aspects of prototyping thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.
Microcontroller Overview
MCU Card / MCU
Architecture
ARM Cortex-M4
MCU Memory (KB)
1024
Silicon Vendor
NXP
Pin count
121
RAM (Bytes)
262144
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Clicker 2 for Kinetis as your development board.
Track your results in real time
Application Output via Debug Mode
1. Once the code example is loaded, pressing the "DEBUG" button initiates the build process, programs it on the created setup, and enters Debug mode.
2. After the programming is completed, a header with buttons for various actions within the IDE becomes visible. Clicking the green "PLAY" button starts reading the results achieved with the Click board™. The achieved results are displayed in the Application Output tab.
Software Support
Library Description
This library contains API for Water Detect 2 Click driver.
Key functions:
waterdetect2_get_fluid_status- Water Detect 2 get fluid status function.waterdetect2_enable- Water Detect 2 enable function.waterdetect2_disable- Water Detect 2 disable function.
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 main.c
* @brief Water Detect 2 Click Example.
*
* # Description
* This library contains API for Water Detect 2 Click driver.
* Water Detect 2 click is used for detecting water and other electroconductive liquids.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes driver and performs the default configuration.
*
* ## Application Task
* Reads fluid presence status and determines if there is fluid presence or not.
*
* @author Nenad Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "waterdetect2.h"
static waterdetect2_t waterdetect2; /**< Water Detect 2 Click driver object. */
static log_t logger; /**< Logger object. */
static uint8_t fluid_status_old = 2;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
waterdetect2_cfg_t waterdetect2_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.
waterdetect2_cfg_setup( &waterdetect2_cfg );
WATERDETECT2_MAP_MIKROBUS( waterdetect2_cfg, MIKROBUS_1 );
if ( DIGITAL_OUT_UNSUPPORTED_PIN == waterdetect2_init( &waterdetect2, &waterdetect2_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
waterdetect2_default_cfg( &waterdetect2 );
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
uint8_t fluid_status = waterdetect2_get_fluid_status( &waterdetect2 );
if ( fluid_status != fluid_status_old )
{
if ( WATERDETECT2_FLUID_DETECTED == fluid_status )
{
log_printf( &logger, " Fluid present! \r\n" );
}
else
{
log_printf( &logger, " No fluid present. \r\n" );
}
log_printf( &logger, "------------------- \r\n" );
fluid_status_old = fluid_status;
}
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
