hi guys
i want to ask about my project. I use uno for controling and monitoring HVAC system, i use lcd keypad shield for setting the setpoint temperature and differential, and I use PLX-daq to send data from 4 ds18b20 temp sensor.
I want to send temperature data in every 30sec to the excel, but when i set delay(30000)in the program, the keypad (LCD-keypad) doesnt work, and i cant regulate the setpoint from the keypad (LCD-keypad shield). anyone can help me about the program please?? im beginner user.
thanks,,
best regards,
this is the code;
#include <stdio.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#define ONE_WIRE_BUS_PIN 3
OneWire oneWire(ONE_WIRE_BUS_PIN);
DallasTemperature sensors(&oneWire);
#include <LiquidCrystal.h>
#define btnRIGHT 0
#define btnUP 1
#define btnDOWN 2
#define btnLEFT 3
#define btnSELECT 4
#define NUM_KEYS 5
const int relay = 13;
float temp,temp0,temp1,temp2;
int settemp = 29;
int diff = 4;
int cutin;
int cutout;
int keyEvent = -1;
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
void setup() {
pinMode(relay, OUTPUT);
Serial.begin(9600);
lcd.begin(16, 2);
lcd.setCursor(8,0);
lcd.print("Diff:");
lcd.print(diff);
lcd.setCursor(0,0);
sensors.requestTemperatures();
temp = sensors.getTempCByIndex(0);
lcd.print("Set:");
lcd.print(settemp);
Serial.println("CLEARDATA");
Serial.println("LABEL,Time,Temperature1,Temperature2,Temperature3,Temperature4");
}
void plx()
{
sensors.requestTemperatures();
temp0 = sensors.getTempCByIndex(1);
temp1 = sensors.getTempCByIndex(2);
temp2 = sensors.getTempCByIndex(3);
temp = sensors.getTempCByIndex(0);
Serial.print("DATA,");
Serial.print("TIME,");
Serial.print(temp);Serial.print(",");
Serial.print(temp0);Serial.print(",");
Serial.print(temp1);Serial.print(",");
Serial.print(temp2);Serial.print(",");
Serial.println(temp);
temp++;
Serial.println(temp0);
temp0++;
Serial.println(temp1);
temp1++;
Serial.println(temp2);
temp2++;
delay(30000);
}
void loop()
{
plx();
cutout=(settemp-(diff/2));
cutin=(settemp+(diff/2));
lcd.setCursor(0,0);
lcd.print("Set:");
lcd.print(settemp);
lcd.setCursor(8,0);
lcd.print("Diff:");
lcd.print(diff);
lcd.setCursor(0,1);
lcd.print("Cabin:");
lcd.print(temp);
if (temp > cutin)
{
digitalWrite(relay, HIGH);
}
if (temp <= cutout)
{
digitalWrite(relay, LOW);
}
int keyEvent = detectKey();
if (keyEvent>=0)
switch (keyEvent)
{
case btnRIGHT:
{
diff = (diff + 1);
lcd.clear();
break;
}
case btnLEFT:
{
diff = (diff - 1);
lcd.clear();
break;
}
case btnUP:
{
settemp = (settemp + 1);
lcd.clear();
break;
}
case btnDOWN:
{
settemp = (settemp - 1);
lcd.clear();
break;
}}}
int adc_key_val[NUM_KEYS] ={ 50, 195, 380, 555, 760};
int get_key(unsigned int input)
{
int k;
for (k = 0; k < NUM_KEYS; k++)
{
if (input < adc_key_val[k])
return k;
}
if (k >= NUM_KEYS)
k = -1; // No valid key pressed
return k;
}
// ===================================================================
// new key detection routine, without delays!
int lastKeyEvent = 0;
int curKeyEvent = 0;
int keyToReturn = 0;
boolean keyToProcess = false;
int adc_key_in = 0;
int detectKey()
{
keyToReturn = -1;
adc_key_in = analogRead(0); // read the value from the sensor
curKeyEvent = get_key(adc_key_in); // convert into key press
if (curKeyEvent != lastKeyEvent)
{
if (!keyToProcess)
{
lastKeyEvent = curKeyEvent;
keyToProcess = true;
}
else
{
keyToReturn = lastKeyEvent;
lastKeyEvent = -1;
keyToProcess = false;
}
}
return keyToReturn;
}
// ===================================================================
