Hi, I am building a smart system for garden care, and I need to measure the temperature with a thermocouple for my temp control system, the problem is that I also need to connect my system to internet, reason why I am using the ENC28J60 module. When I am using those individually, everything works fine but when I try to use both at the same time, the Ethernet module works fine but the MAX6675 says me that the temperature is 0 (IN OTHER WORDS IT DOESNT WORK). Any idea of how to resolve my problem. The other small problem that I have, is that while my module is waiting for the DHCP to assign it an IP, my LCD is not showing any information.
Thank you,
I leave my code here.
//LCD config (i2c LCD screen, you need to install the LiquidCrystal_I2C if you don't have it )
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,2,1,0,4,5,6,7); //sometimes the adress is not 0x3f. Change to 0x27 if it dosn't work.
//LCD config (i2c LCD screen, you need to install the LiquidCrystal_I2C if you don't have it )
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,2,1,0,4,5,6,7); //sometimes the adress is not 0x3f. Change to 0x27 if it dosn't work.
#include <max6675.h>
#include <SPI.h>
//We define the SPI pìns
#define SO_PIN 50
#define CK_PIN 52
#define CS_PIN_A 25
MAX6675 thermocouple(CK_PIN, CS_PIN_A, SO_PIN); // Creacion del objeto MAX6675 para lectura de termocupla
//BLYNK
#define BLYNK_PRINT Serial
#include <UIPEthernet.h>
#include <BlynkSimpleUIPEthernet.h>
char auth[] = "c9d17da1a5ac40bd962d76366322e149";
BlynkTimer timer; // Create a Timer object called "timer"!
//Pins
int PINRELAY = 3;
int PINBOTONMAS = 4;
int PINBOTONMENOS = 9;
int PINSENHUMEDAD = A0;
int PINRELAYLUZ = 5;
int PININTERRUPTOR = 6;
int PINRELAYBOMBA = 7;
int PINSENSORDENIVEL = 8;
//Variables
float temperature_read = 0.0;
int set_temperature = 20;
float PID_error = 0;
float previous_error = 0;
float elapsedTime, Time, timePrev;
int PID_value = 0;
int Valuetouse = 0;
int BotonMenos;
int BotonMas;
int ValeurSensorHumedad = 0;
int pourcentageHumedad = 0;
int Interruptorluz;
int Nivel;
int Interruptorcalefaccion;
//PID constants
int kp = 9.1; int ki = 0.3; int kd = 1.8;
int PID_p = 0; int PID_i = 0; int PID_d = 0;
//BLYNK
BLYNK_WRITE(V0)//Permite leer el valor del virtual PIN 1 en BLYNK
{
Interruptorluz = param.asInt(); // Asigna los valores que lee del Virtual PIN 1 a una variable
}
BLYNK_WRITE(V1)//Permite leer el valor del virtual PIN 1 en BLYNK
{
Interruptorcalefaccion = param.asInt(); // Asigna los valores que lee del Virtual PIN 1 a una variable
}
BLYNK_WRITE(V2)//Permite leer el valor del virtual PIN 2 en BLYNK
{
set_temperature = param.asInt(); // Asigna los valores que lee del Virtual PIN 2 a una variable
}
BLYNK_READ(V3) // Widget in the app READs Virtal Pin V3 with the certain frequency
{
// This command writes Arduino's uptime in seconds to Virtual Pin V3
Blynk.virtualWrite(3, set_temperature);
}
BLYNK_READ(V4) // Widget in the app READs Virtal Pin V4 with the certain frequency
{
// This command writes Arduino's uptime in seconds to Virtual Pin V4
Blynk.virtualWrite(4, pourcentageHumedad);
}
BLYNK_READ(V9) // Widget in the app READs Virtal Pin V4 with the certain frequency
{
// This command writes Arduino's uptime in seconds to Virtual Pin V4
Blynk.virtualWrite(9, temperature_read);
}
WidgetLED led1(V5); //register to virtual pin 5
WidgetLED led2(V6); //register to virtual pin 6
void lednivelaguablynk(){
if (Nivel==1){
led1.off();
}
else{
led1.on();
}
}
void ledpumpstateblynk(){
if (pourcentageHumedad <= 60 or Nivel !=1) {
led2.on();
}
else {
led2.off();
}
}
void setup() {
pinMode(PINRELAY,OUTPUT);
pinMode(PINBOTONMAS,INPUT);
pinMode(PINBOTONMENOS,INPUT);
pinMode(PININTERRUPTOR,INPUT);
pinMode(PINRELAYLUZ,OUTPUT);
pinMode(PINRELAYBOMBA,OUTPUT);
pinMode(PINSENSORDENIVEL,INPUT);
Time = millis();
lcd.setBacklightPin(3,POSITIVE);
lcd.setBacklight(HIGH);
lcd.begin(16, 2);
//Blynk
Serial.begin(9600);
Blynk.begin(auth);
Blynk.begin(auth, "blynk-cloud.com", 80);
timer.setInterval(1000L, lednivelaguablynk);
timer.setInterval(1000L, ledpumpstateblynk);
}
void loop() {
Blynk.run();
timer.run();
// First we read the real value of temperature
temperature_read = thermocouple.readCelsius();
//Next we calculate the error between the setpoint and the real value
PID_error = set_temperature - temperature_read;
//Calculate the P value
PID_p = kp * PID_error;
//Calculate the I value in a range on +-3
if(-3 < PID_error <3)
{
PID_i = PID_i + (ki * PID_error);
}
//For derivative we need real time to calculate speed change rate
timePrev = Time; // the previous time is stored before the actual time read
Time = millis(); // actual time read
elapsedTime = (Time - timePrev) / 1000;
//Now we can calculate the D calue
PID_d = kd*((PID_error - previous_error)/elapsedTime);
//Final total PID value is the sum of P + I + D
PID_value = PID_p + PID_i + PID_d;
//We define PWM range between 0 and 255
if(PID_value < 0)
{ PID_value = 0; }
if(PID_value > 100)
{ PID_value = 100; }
Valuetouse=(100-PID_value);
if (Interruptorluz==0){
digitalWrite(PINRELAYLUZ,LOW);
}
else{
digitalWrite(PINRELAYLUZ,HIGH);
}
if (Interruptorcalefaccion==0){
//HIGH ES APAGADO - LOW ES PRENDIDO
if (temperature_read > set_temperature*(1-(Valuetouse/100))){
digitalWrite(PINRELAY,HIGH);
}
else{
digitalWrite(PINRELAY,LOW);
}
}
else{
digitalWrite(PINRELAY,HIGH);
}
previous_error = PID_error; //Remember to store the previous error for next loop.
Nivel = digitalRead(PINSENSORDENIVEL);
ValeurSensorHumedad = readhumidity();
pourcentageHumedad = ConvertEnPorcentaje(ValeurSensorHumedad);
if (pourcentageHumedad > 100){
pourcentageHumedad = 100;
}
if (pourcentageHumedad < 0){
pourcentageHumedad = 0;
}
if (pourcentageHumedad <= 60 or Nivel !=1) {
digitalWrite(PINRELAYBOMBA,LOW);
}
else {
digitalWrite(PINRELAYBOMBA,HIGH);
}
BotonMenos = digitalRead(PINBOTONMENOS);
BotonMas= digitalRead(PINBOTONMAS);
if (BotonMenos != 1){
set_temperature--;
}
if (BotonMas != 1){
set_temperature++;
}
delay(500);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("H:");
lcd.setCursor(2,0);
lcd.print(pourcentageHumedad);
lcd.setCursor(5,0);
lcd.print("%");
lcd.setCursor(0,1);
lcd.print("S:");
lcd.setCursor(2,1);
lcd.print(set_temperature,1);
lcd.setCursor(9,1);
lcd.print("R:");
lcd.setCursor(11,1);
lcd.print(temperature_read,1);
}
int ConvertEnPorcentaje(int value){
int ValeurPorcentage = 0;
ValeurPorcentage = map(value, 1023, 350, 0, 100);
return ValeurPorcentage;
}
int readhumidity(){
int valorhumedad = 0;
valorhumedad = analogRead(PINSENHUMEDAD);
return valorhumedad;
}
/* Max6675 Module ==> Arduino
* CS ==> D25
* SO ==> D50
* SCK ==> D52
* Vcc ==> Vcc (5v)
* Gnd ==> Gnd */
/* Temp ==> Arduino
* RelayIN1 ==> D3
/* Botones ==> Arduino
* Boton+Temp ==> D4
* Boton-Temp ==> D9 */
/* i2c LCD Module ==> Arduino
* SCL ==> D21
* SDA ==> D20
* Vcc ==> Vcc (5v)
* Gnd ==> Gnd */
/* YL-69 ==> Arduino
* A0 ==> A0
* D0 ==> --
* Gnd ==> Gnd
* Vcc ==> Vcc (5v)
*/
/* Foco (interruptor+relay) ==> Arduino
* Interruport (iz) ==> D6
* Interruptor (cen) ==> Vcc (5v)
* Interruptor (iz2) ==> GND
* RelayIN2 ==> D5
*/
/* Bomba de agua ==> Arduino
* RelayIN3 ==> D7
*/
/* Sensor de nivel ==> Arduino
* Sensor ==> D8
*/
/* Modulo Ethernet ENC28J60 ==> Arduino
* CS ==> D53
* SI ==> D51
* SCK ==> D52
* SO ==> D50
* INT ==> D19
* Gnd ==> GND
* Vcc ==> Vcc (5v)
*/
