Alcohol Click has a high sensitivity to alcohol and it can be used to detect alcohol in concentrations from 0.04 to 4mg/l.
Alcohol Click carries an MQ-3 Semiconductor sensor for alcohol. The Click is designed to run on a 5V power supply only. It communicates with the target microcontroller through the AN pin on the mikroBUS™ line.
- Author : Jelena Milosavljevic
- Date : Jun 2021.
- Type : ADC type
We provide a library for the Alcohol Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
This library contains API for Alcohol Click driver.
alcohol_cfg_setup
Config Object Initialization function.
void alcohol_cfg_setup ( alcohol_cfg_t *cfg );
alcohol_init
Initialization function.
ALCOHOL_RETVAL alcohol_init ( alcohol_t *ctx, alcohol_cfg_t *cfg );
alcohol_read_an_pin_value
This function reads results of AD conversion of the AN pin.
err_t alcohol_read_an_pin_value ( alcohol_t *ctx, uint16_t *data_out );
alcohol_read_an_pin_voltage
This function reads results of AD conversion of the AN pin and converts them to proportional voltage level.
err_t alcohol_read_an_pin_voltage ( alcohol_t *ctx, float *data_out );
The demo application shows the reading of the adc values given by the sensors.
The demo application is composed of two sections :
Configuring Clicks and log objects.
void application_init ( void ) {
log_cfg_t log_cfg; /**< Logger config object. */
alcohol_cfg_t alcohol_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.
alcohol_cfg_setup( &alcohol_cfg );
ALCOHOL_MAP_MIKROBUS( alcohol_cfg, MIKROBUS_1 );
if ( alcohol_init( &alcohol, &alcohol_cfg ) == ADC_ERROR ) {
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
Reads the adc value and prints in two forms (DEC and HEX).
void application_task ( void ) {
uint16_t alcohol_an_value = 0;
if ( alcohol_read_an_pin_value ( &alcohol, &alcohol_an_value ) != ADC_ERROR ) {
log_printf( &logger, " ADC Value : %u\r\n", alcohol_an_value );
}
float alcohol_an_voltage = 0;
if ( alcohol_read_an_pin_voltage ( &alcohol, &alcohol_an_voltage ) != ADC_ERROR ) {
log_printf( &logger, " AN Voltage : %.3f[V]\r\n\n", alcohol_an_voltage );
}
Delay_ms ( 1000 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
Other Mikroe Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.Alcohol
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. UART terminal is available in all MikroElektronika compilers.