Hi,
I have written this code with help from other program examples that i have sourced and want to know if I am on the right track.
The program is for automatic control of an alcohol still I have.
The servos and relays etc are yet to be wired up, but I have a question about what I have written.
I have several sequences that are to be run in order and I am worried that when each sequence finishes it will move through the earlier sequences as well as the sequence it is up to.
Let me give you an example: (look at the code below…)
The equal sequence runs (equal int = 1) and times out, and the heads integer is then set to = 1.
When the loop comes around again, because equal int still = 1, will it start counting again?
Any help would be greatly appreciated. I thought I would ask the forum as I have a few weeks until I wire the sensors and relays etc.
Matt
int Tmid = 0; //initialize variables, T is the input from the middle thermistor
int Ttop = 0; //initialize variables, T is the input from the top thermistor
int waterTmid = 50; // waterT is the initial temp to turn on water
int safetyTmid = 85; // the safety middle temp when the heater should turn off
int safetyTtop = 85; // the safety top temp when the heater should turn off
int boil = 0; // If boil is 0, then the boil has not started. If it is 1, then the boil has started.
int equal = 0; // If equal is 0, then the boil is not to temp. If it is 1, then the boil is at temp and equalising.
int heads = 0; // If heads is 0, then the equalisation has not finished. If it is 1, then the heads has started.
int hearts = 0; // If hearts is 0, then the heads have not finished. If it is 1, then the hearts have started.
int shutdown = 0; // If shut is 0, then the hearts has not finished. If it is 1, then the shutdown will commence.
int overtemp = 0; // If overtemp is 0, then all is well. If it is 1, then the process will shutdown.
int start = 7; // choose the input pin (for a pushbutton)
int switch1 = 5; // variable for reading the B1 button pin status
int switch2 = 6; // variable for reading the B1 button pin status
int val1; // Variable for reading start button B1
int val2; // Variable for reading stop button B2
long startone = 0; // placeholder for the starting time for mash 1
long stopone = 0; // placeholder for the stop time for mash 1
long remaining = 0; // difference between startone and stopone
int remainsecs = 0; // convert to something close to a second like integer
void setup(){ // run setup once
pinMode(4, OUTPUT); // initialize pin 4 as output, will be used to trigger heater relay circuit
pinMode(8, OUTPUT); // initialize pin 8 as output, will be used to trigger pump relay circuit
pinMode(switch1, INPUT);
pinMode(switch2, INPUT);
Serial.begin(9600); // sends serial data to pc, allow for reading the temp and status as reported by Serial.print
}
void loop(){ // loop this as long as Arduino has power or until reset button is pressed
delay(1000); // 1 second delay between loops ????????????????????????????????????????????
// Temp display
Ttop = analogRead(2); // get voltage from mid thermistor
Serial.print("Top: "); // print midthermistor value to pc, this is not really temp but a number between 1 and 1024
Serial.print(Ttop);
Serial.print("\n");
Tmid = analogRead(3); // get voltage from top thermistor
Serial.print("Mid: "); // print thermistor value to pc, this is not really temp but a number between 1 and 1024
Serial.print(Tmid);
Serial.print("\n");
// Start
if (boil == 0){ // if process has not started
Serial.print("Press Start button...");
val1 = digitalRead(switch1); // read input value and store it in val
if (val1 == HIGH) { // check if the advance button is pressed
boil = 1; }
// Boil
if (boil == 1){ // Boil process
digitalWrite(4, HIGH); // Heat on
digitalWrite(8, LOW); // Water off
Serial.println("Boiling..."); // this prints out every second
}
// Water on
if (Tmid > waterTmid){ // if mid temp is more than safety temp, do this loop
digitalWrite(4, HIGH); // Heat on
digitalWrite(8, HIGH); // turn on cooling water
Serial.println("Heat down, Water on"); // this prints out when water is on
equal = 1;
// Servo movement needed!!!!!!!!!!!!!!!!!!!!!!
startone = millis(); // start mash clock, reads milliseconds from this moment
stopone = startone + 3600000; // calculate the end of mash, 3.6 million milliseconds or 60 minutes
}
// Equal
if (equal == 1){ // Equal process
digitalWrite(4, HIGH); // Heat on
digitalWrite(8, HIGH); // Water on
long curtime = millis(); // set variable curtime to the elapsed time since program started
remaining = (-1)*(curtime - stopone); // caculate how many milliseconds until mash is complete
remainsecs = (int)(remaining/1000); // convert into human readable second like intervals but not exact
Serial.print(remainsecs); // print it to screen
Serial.print(" - ");
Serial.print("Remaining");
Serial.print("\n");
if (val1 == HIGH) { // check if the advance button is pressed
heads = 1; }
if (curtime > stopone){ // if we reach the end of the mash time
heads = 1; }
}
// Collect heads
if (heads == 1){ // Heads process
digitalWrite(4, HIGH); // Heat on
digitalWrite(8, HIGH); // Water on
Serial.println("Collecting heads..."); // this prints out every second
if (val1 == HIGH) { // check if the advance button is pressed
hearts = 1; }
// Stepping motor needed!!!!!!!!!
}
// Collect hearts
if (hearts == 1){ // Hearts process
digitalWrite(4, HIGH); // Heat on
digitalWrite(8, HIGH); // Water on
Serial.println("Collecting hearts..."); // this prints out every second
// Stepping motor needed!!!!!!!!!
}
// Shutdown
if (shutdown == 1){ // if process is complete, loop this
digitalWrite(4, LOW); // Heat off
digitalWrite(8, LOW); // Water off
Serial.println("Process completed"); // this prints out every second
}
if (Tmid > safetyTmid){ // if mid temp is more than safety temp, do this loop
digitalWrite(4, LOW); // turn off heat and pump
digitalWrite(8, LOW);
Serial.println("Overtemp Mid"); // this prints out every second ****need a timer to shut off water!!!!
shutdown = 1;
}
if (Ttop > safetyTtop){ // if top temp is more than safety temp, do this loop
digitalWrite(4, LOW); // turn off heat and pump
digitalWrite(8, LOW);
Serial.println("Overtemp Mid"); // this prints out every second
overtemp = 1;
}
if (overtemp == 1){ // overtemp shutdown
digitalWrite(4, LOW); // Turn on heat
digitalWrite(8, HIGH); // Turn on water
Serial.println("Overtemp Shutdown!"); // Prints boil on screen ****need a timer to shut off water!!!!
// Stop Button
val2 = digitalRead(switch2); // read input value and store it in val
if (val2 == HIGH) { // check if the button is pressed
overtemp = 1; }
}
}
}
Moderator edit:
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tags added.
