Jorge Eduardo Porras B
Published © GPL3+

Mushroom cultivation

Control the parameters of temperature, humidity, lighting and check the access to the crop to automate the process.

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Mushroom  cultivation

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C/C++
/* ========================================
 *
 * Copyright YOUR COMPANY, THE YEAR
 * All Rights Reserved
 * UNPUBLISHED, LICENSED SOFTWARE.
 *
 * CONFIDENTIAL AND PROPRIETARY INFORMATION
 * WHICH IS THE PROPERTY OF your company.
 * Credits: Ing. Jorge Eduardo Porras B.
 * ========================================
*/
#include "project.h"
#include <stdio.h>
#include "LiquidCrystal_I2C.h"

/* LCD Address */
uint32_t Addr=0x3F;


int16 temp, hume;
char mensaje[12];

//****TEMPERATURE SENSOR VARIABLES

// /* Variables to hold the the ADC readings */
int16 adcResultVREF, adcResultVTH;
    
///* Filter input and output variables for Vref and Vth measurements */
int16 filterOutputVref=0;
int16 filterOutputVth=0;
//    
///* Variables to hold calculated resistance and temperature */
int16 thermistorResistance, temperature;
    
#define ADC_CHANNEL_VREF			(0u)
#define ADC_CHANNEL_VTH				(1u)
#define FILTER_COEFFICIENT_TEMPERATURE	(32u)

//****MOISTURE SENSOR VARIABLES

uint16 humidityRawCounts;	/* Raw count from CapSense Component for the humidity sensor */
uint16 capacitance;			/* Capacitance of the humidity sensor */
uint16 humidity;			/* Measured humidity */
uint16 rawCountsRefCap;     /* Raw count from CapSense Component for the Reference capacitor */

#define CAPACITANCE_AT_55_RH        (1800)
/* Sensitivity numerator and denominator indicate sensitivity of the sensor */
#define SENSITIVITY_NUMERATOR       (31)
#define SENSITIVITY_DENOMINATOR     (100)
/* Value of reference capacitor.  Note that this value includes the pin capacitance
    and the physical 180pF reference capacitor */
#define CREF                        (1930)
/* Offset Capacitance */
#define COFFSET                     (150)
/* This is raw count equivalent to trace capacitance */
#define OFFSETCOUNT                 (1536)
#define BUFFERSIZE                  (8)
#define READ_WRITE_BOUNDARY         (0)
/* Nominal humidity 55% */
#define NOMINAL_HUMIDITY            (550)
#define HUMIDITY_0_PERCENT          (0)
#define HUMIDITY_100_PERCENT        (1000)
#define HUMIDITY_50                 (500)   

//****LIGHTING SENSOR VARIABLES

/* This variable is used to store the ADC result */
int16 adcResult;
	
/* These are used for firmware low pass filter input and output */
int16 filterInput;
int32 filterOutput = 0;
	
/* Variable to store sensor current and light illuminance */
int16 alsCurrent;
uint16 illuminance;
int16 alsCurrent;			/* Ambient light sensor current output */
uint16 illuminance; 		/* Ambient light illuminance */	

#define FILTER_COEFFICIENT_ALS			        (10)

/* Constants for photodiode current calculation */
/* Scale Factor = (VREF / (2048 * 220K)) * 10^9 nA = 2.6633 
   As the TIA produces a negative voltage, the scale factor is made 
   negative */
#define ALS_CURRENT_SCALE_FACTOR_NUMERATOR		(-26633)
#define ALS_CURRENT_SCALE_FACTOR_DENOMINATOR	(10000)

/* Constants for ambient light calculation */
/* Scale Factor = 10000Lx / 3000nA = 3.333 */
#define ALS_LIGHT_SCALE_FACTOR_NUMERATOR		(3333)
#define ALS_LIGHT_SCALE_FACTOR_DENOMINATOR		(1000)

#define PWM_DUTY_SCALE	         (1u)	
#define PWM_DUTY_OFFSET	         (0)
#define ADC_CHANNEL_ALS          (2u)	

__inline uint16 CalculateCapacitance(uint16 rawCounts, uint16 refSensorCounts);
__inline uint16 CalculateHumidity(uint16 capacitance);

int main(void)
{
    CyGlobalIntEnable; /* Enable global interrupts. */

    /* Place your initialization/startup code here (e.g. MyInst_Start()) */
    ADC_1_Start();  
    I2C_Start();
    CSD_Start();
    /* Start Reference buffer */
    VrefBuffer_Start();
    /* Start Programmable Voltage Reference */
    PVref_Start();
    /* Enable Programmable Voltage Reference */
    PVref_Enable();
    /* Start the trans-impedance amplifier (TIA) */
	Opamp_TIA_Start();
    /* Start Reference buffer */
	RefBuffer_Start();
    /* Start Programmable Voltage Reference */
	PVref_1_Start();
    /* Enable Programmable Voltage Reference */
    PVref_1_Enable();
    
    LiquidCrystal_I2C_init(Addr,20,4,0);
    begin();
        
    for(;;)
    {
        /* Place your application code here. */
        ADC_1_StartConvert(); 
        ADC_1_IsEndConversion(ADC_1_WAIT_FOR_RESULT); 
        adcResultVREF = ADC_1_GetResult16(ADC_CHANNEL_VREF);
        adcResultVTH = ADC_1_GetResult16(ADC_CHANNEL_VTH);
        adcResult= ADC_1_GetResult16(ADC_CHANNEL_ALS); 
        
        //TEMPERATURE CALCULATIONS
        
        /* Low pass filter the measured ADC counts of Vref */            
        filterOutputVref = (adcResultVREF + (FILTER_COEFFICIENT_TEMPERATURE - 1) * filterOutputVref) / FILTER_COEFFICIENT_TEMPERATURE;
        /* Low pass filter the measured ADC counts of Vth */         
        filterOutputVth = (adcResultVTH + (FILTER_COEFFICIENT_TEMPERATURE - 1) * filterOutputVth) / FILTER_COEFFICIENT_TEMPERATURE;
        /* Calculate thermistor resistance */
        thermistorResistance = Thermistor_GetResistance(filterOutputVref, filterOutputVth);           
         /* Calculate temperature in degree Celsius using the Component API */
        temperature = Thermistor_GetTemperature(thermistorResistance);
        temp=temperature*0.01;  
              
        //LIGHTING CALCULATIONS
                        
        /* Low pass filter the ADC result */
		filterInput = adcResult;
    	filterOutput = (filterInput + (FILTER_COEFFICIENT_ALS - 1)*filterOutput)/FILTER_COEFFICIENT_ALS;
    	/* Calculate the photodiode current */
		alsCurrent = (filterOutput * ALS_CURRENT_SCALE_FACTOR_NUMERATOR)/ALS_CURRENT_SCALE_FACTOR_DENOMINATOR; 
		/* If the calculated current is negative, limit it to zero */
		if(alsCurrent < 0)
		{
			alsCurrent = 0;
		}
		/* Calculate the light illuminance */
		illuminance = (alsCurrent * ALS_LIGHT_SCALE_FACTOR_NUMERATOR)/ALS_LIGHT_SCALE_FACTOR_DENOMINATOR;	
              
        //MOISTURE CALCULATIONS
        
         if(!(CSD_IsBusy()))
        {       
           humidityRawCounts = CSD_BUTTON0_SNS0_RAW0_VALUE;
           rawCountsRefCap = CSD_BUTTON0_SNS1_RAW0_VALUE;
           /* Convert raw counts to capacitance */
           capacitance = CalculateCapacitance(humidityRawCounts, rawCountsRefCap);
           /*Calculate humidity */
           humidity = CalculateHumidity(capacitance);  
           hume=humidity*0.1;
           CSD_ScanAllWidgets();
        }
        
        sprintf(mensaje,"Te=%.2i   ",temp);
        setCursor(0,0);
        LCD_print(mensaje);
        setCursor(5,0);
        LCD_print("C");
                
        sprintf(mensaje,"Lx=%.2i   ",illuminance);
        setCursor(0,1);
        LCD_print(mensaje);
        
        sprintf(mensaje,"Hu=%.2i   ",hume);
        setCursor(8,0);
        LCD_print(mensaje);
        setCursor(14,0);
        LCD_print("%");
        
        //GREENHOUSE CONTROL
        
        if (temp <24) {
           Control_Calefactor_Write(1u);       
           Control_Ventilador_Write(0u); 
        }    
        if ((temp >=24) & (temp<=26) ) {
           Control_Calefactor_Write(0u);       
           Control_Ventilador_Write(0u); 
        } 
         if (temp >26) {
           Control_Calefactor_Write(0u);       
           Control_Ventilador_Write(1u); 
        }    
        if (hume <80) {
           Control_Nebulizador_Write(1u);       
        }    
        if (hume >=82) {
           Control_Nebulizador_Write(0u);       
        }    
         if (illuminance <100) {
           Control_Iluminacion_Write(1u);       
        }    
        if (illuminance >=102) {
           Control_Iluminacion_Write(0u);       
        }    
        
        
        
        CyDelay(250u);//milisegundos
        
    }
}

__inline uint16 CalculateCapacitance(uint16 rawCounts, uint16 refsensorCounts)
{
    return (uint16)((float)(rawCounts - OFFSETCOUNT) * (CREF - COFFSET) / (float)(refsensorCounts - OFFSETCOUNT));
}

__inline uint16 CalculateHumidity(uint16 capacitance)
{
    int16 humidity;
    int16 delta;
    /* Find capacitance difference from nominal capacitance at 55% RH */
    delta = capacitance - CAPACITANCE_AT_55_RH;
    /* Calculate humidity from capacitance difference and sensor sensitivity */
    humidity = ((delta * SENSITIVITY_DENOMINATOR) / SENSITIVITY_NUMERATOR) + NOMINAL_HUMIDITY;
    /* If humidity is less than zero, limit it to 0; If humidity is greater than 1000 (100%), limit to 1000 */
    humidity = (humidity < HUMIDITY_0_PERCENT) ? HUMIDITY_0_PERCENT : (humidity > HUMIDITY_100_PERCENT) ? HUMIDITY_100_PERCENT : humidity;
    /* Return Humidity value */
    return humidity;
}


/* [] END OF FILE */

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Jorge Eduardo Porras B

Jorge Eduardo Porras B

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