I started a new home project. I needed a motor with low RPM and high torque, to pull on both sides. I added two buttons to run the motor in either side instantaneously and another two to push till a certain time limit. Then I added a wait time before the trigger. While the project is still under construction, here is the arduino code, a crude circuit diagram and a demo of the motor run only.
It took me about 30 minutes to write this code. While I am certain it can be further optimized and improved, my energy is is better spent on other things. Considering it's going to run on a single chip, I am going to leave it as is for now.
it's a good example of what kind of code goes in embedded systems. lines of code grow exponentially as the conditions increase.
Update April-16-2022 : I ran the test and everything worked fine until the end.
Phase 1- connect ropes to allow one person to pull the cover without bunching up.
Phase 2 - connect a motor to reduce manual winding/unwinding.
Everything went well until the end, the reel wheel crumbled under pressure, literally. Now either I find a better way and use the other good end to connect the motor, or I purchase a heavy duty reel since a 16mil cover is too heavy for any reel to pull.
From left to right, Power supply, relay bank, Arduino, beeper, and an RC circuit to absorb transient surges.
Update: Dec-17-2022-vlog below
Final update - April 22nd-2023
The system is fully installed and functional. Videos below.
Introduction:
Opening the pool:
Closing the pool:
Arduino code below -April 16-2022:
#define relay1 2
#define relay2 3
#define relay3 4
#define beeper 5
#define button1 A1
#define button2 A2
#define button3 A3
#define button4 A4
bool button1state;
bool button2state;
bool button3state;
bool button4state;
bool readystate;
bool poolopenstate = false;
int beepercount = 0;
int button1value;
int button2value;
int button3value;
int button4value;
int runningstate = 0;
unsigned long runningtime = 0;
unsigned long fullruntimeopen = 10000;
unsigned long fullruntimeclose = 10000;
unsigned long waittimeopen = 2000;
unsigned long waittimeclose = 2000;
unsigned long timestamp1 = 0;
void setup() {
Serial.begin (9600);
delay(100);
pinMode(relay1, OUTPUT);
pinMode(relay2, OUTPUT);
pinMode(relay3, OUTPUT);
pinMode(beeper, OUTPUT);
pinMode(button1, INPUT);
pinMode(button2, INPUT);
pinMode(button3, INPUT);
pinMode(button4, INPUT);
button1value = analogRead(button1);
button2value = analogRead(button2);
button3value = analogRead(button3);
button4value = analogRead(button4);
if((button1value<20)||(button1value<20)||(button1value<20)||(button1value<20))
{
readystate = false;
Serial.println("not ready");
}
else
{
readystate = true;
Serial.println("ready");
}
timestamp1 = millis();
}
void loop() {
beepercount++;
switch(beepercount){
case 0:
break;
case 1:
digitalWrite(beeper, LOW);
break;
case 2:
if (!poolopenstate)
{
digitalWrite(beeper, HIGH);
}
break;
case 3:
break;
case 4:
digitalWrite(beeper, HIGH);
break;
case 5:
beepercount = 0;
break;
}
if(!readystate)
{
button1value = analogRead(button1);
button2value = analogRead(button2);
button3value = analogRead(button3);
button4value = analogRead(button4);
if((button1value<20)||(button1value<20)||(button1value<20)||(button1value<20))
{
readystate = false;
}
else
{
readystate = true;
}
}
else
{
timestamp1=millis();
button1value = analogRead(button1);
button2value = analogRead(button2);
button3value = analogRead(button3);
button4value = analogRead(button4);
if(button1value<20){
button1state = true;
}
else{
button1state = false;
}
if(button2value<20){
button2state = true;
}
else{
button2state = false;
}
if(button3value<20){
button3state = true;
}
else{
button3state = false;
}
if(button4value<20){
button4state = true;
}
else{
button4state = false;
}
//Serial.println(String(button1value)+"|"+String(button2value)+"|"+String(button3value)+"|"+String(button4value));
//Serial.println(String(button1state)+String(button2state)+String(button3state)+String(button4state)+":"+String(timestamp1)+"|"+String(runningtime)+"|"+String(runningstate));
if((button2state == true) or (button3state == true))
{
if(button2state==true)
{
runningstate = 2;
}
else
{
runningstate = 3;
}
}
else
{
if ((runningstate == 2) or (runningstate == 3))
{
runningstate = 0;
}
}
if(button1state==true)
{
if (runningstate != 1)
{
runningstate = 1;
runningtime= millis();
}
}
if(button4state==true)
{
if (runningstate != 4)
{
runningstate = 4;
runningtime= millis();
}
}
if (runningstate == 0)
{
//turn motor off
digitalWrite(relay1, LOW);
digitalWrite(relay2, LOW);
runningtime = 0;
Serial.println("stopped");
}
if (runningstate == 1)
{
//turn motor forward until counter
if((timestamp1-runningtime) < fullruntimeopen)
{
if((timestamp1-runningtime) > waittimeopen)
{
digitalWrite(relay1, HIGH);
digitalWrite(relay2, LOW);
Serial.println("forward timer");
}
else
{
Serial.println("forward waiting");
}
}
else
{
digitalWrite(relay1, LOW);
digitalWrite(relay2, LOW);
runningstate = 0;
runningtime = 0;
Serial.println("stopping from forward");
}
}
if (runningstate == 2)
{
//turn motor forward
digitalWrite(relay1, HIGH);
digitalWrite(relay2, LOW);
Serial.println("forward");
}
if (runningstate == 3)
{
//turn motor backwards (close)
digitalWrite(relay1, LOW);
digitalWrite(relay2, HIGH);
Serial.println("backwards");
}
if (runningstate == 4)
{
//turn motor backwards until counter
if((timestamp1-runningtime) < fullruntimeclose)
{
if((timestamp1-runningtime) > waittimeclose)
{
digitalWrite(relay1, LOW);
digitalWrite(relay2, HIGH);
Serial.println("backwards timer");
}
else
{
Serial.println("backwards-waiting");
}
}
else
{
digitalWrite(relay1, LOW);
digitalWrite(relay2, LOW);
runningstate = 0;
runningtime = 0;
poolopenstate = true;
Serial.println("stopping from backwards");
}
}
}
delay(200);
}
Updated code with BLE receiver on serial port - Dec-17-2022
#define relay1 2
#define relay2 3
#define relay3 4
#define beeper 5
#define button1 A1
#define button2 A2
#define button3 A3
#define button4 A4
byte byteread;
String Inputdata;
bool button1state;
bool button2state;
bool button3state;
bool button4state;
bool waitingstatus = false;
bool readystate;
bool poolopenstate = false;
int frequency = 2000;
int initfrequency = 2000;
int serialdelay = 0;
int button1value;
int button2value;
int button3value;
int button4value;
int runningstate = 0;
int lowthreshold = 30;
unsigned long runningtime = 0;
unsigned long fullruntimeopen = 20000; //including waittime
unsigned long fullruntimeclose = 20000; //including waittime
unsigned long waittimeopen = 10000;
unsigned long waittimeclose = 10000;
unsigned long timestamp1 = 0;
void setup() {
Serial.begin (9600);
delay(100);
pinMode(relay1, OUTPUT);
pinMode(relay2, OUTPUT);
pinMode(relay3, OUTPUT);
pinMode(beeper, OUTPUT);
pinMode(button1, INPUT);
pinMode(button2, INPUT);
pinMode(button3, INPUT);
pinMode(button4, INPUT);
button1value = analogRead(button1);
button2value = analogRead(button2);
button3value = analogRead(button3);
button4value = analogRead(button4);
if((button1value>lowthreshold)||(button2value>lowthreshold)||(button3value>lowthreshold)||(button4value>lowthreshold))
{
readystate = false;
Serial.println("not ready");
while( true)
{
frequency = frequency * 1.07;
if (frequency > 4000){
frequency = initfrequency;
break;
}
tone(beeper, frequency); // Send 1KHz sound signal...
delay(10);
}
tone(beeper, 0); // Send 1KHz sound signal...
delay(100);
while( true)
{
frequency = frequency * 1.07;
if (frequency > 4000){
frequency = initfrequency;
break;
}
tone(beeper, frequency); // Send 1KHz sound signal...
delay(10);
}
tone(beeper, 0); // Send 1KHz sound signal...
delay(500);
while( true)
{
frequency = frequency * 1.01;
if (frequency > 4000){
frequency = initfrequency;
break;
}
tone(beeper, frequency); // Send 1KHz sound signal...
delay(10);
}
tone(beeper, 0); // Send 1KHz sound signal...
delay(100);
while( true)
{
frequency = frequency * 1.01;
if (frequency > 4000){
frequency = initfrequency;
break;
}
tone(beeper, frequency); // Send 1KHz sound signal...
delay(10);
}
tone(beeper, 0); // Send 1KHz sound signal...
}
else
{
readystate = true;
Serial.println("ready");
}
timestamp1 = millis();
}
void loop() {
Serial.println(String(button1value)+"|"+String(button2value)+"|"+String(button3value)+"|"+String(button4value));
while( true)
{
frequency = frequency * 1.07;
if (frequency > 4000){
frequency = initfrequency;
break;
}
tone(beeper, frequency); // Send 1KHz sound signal...
delay(10);
}
tone(beeper, 0); // Send 1KHz sound signal...
delay(100);
while( true)
{
frequency = frequency * 1.07;
if (frequency > 4000){
frequency = initfrequency;
break;
}
tone(beeper, frequency); // Send 1KHz sound signal...
delay(10);
}
tone(beeper, 0); // Send 1KHz sound signal...
delay(100);
if(waitingstatus)
{
while( true)
{
frequency = frequency * 1.01;
if (frequency > 4000){
frequency = initfrequency;
break;
}
tone(beeper, frequency); // Send 1KHz sound signal...
delay(10);
}
tone(beeper, 0); // Send 1KHz sound signal...
delay(100);
while( true)
{
frequency = frequency * 1.01;
if (frequency > 4000){
frequency = initfrequency;
break;
}
tone(beeper, frequency); // Send 1KHz sound signal...
delay(10);
}
tone(beeper, 0); // Send 1KHz sound signal...
delay(1000);
}
if(!readystate)
{
button1value = analogRead(button1);
button2value = analogRead(button2);
button3value = analogRead(button3);
button4value = analogRead(button4);
if((button1value>lowthreshold)||(button2value>lowthreshold)||(button3value>lowthreshold)||(button4value>lowthreshold))
{
readystate = false;
Serial.println("Still not ready");
}
else
{
readystate = true;
}
}
else
{
button1value = analogRead(button1);
button2value = analogRead(button2);
button3value = analogRead(button3);
button4value = analogRead(button4);
if(button1value>lowthreshold){
button1state = true;
}
else{
button1state = false;
}
if(button2value>lowthreshold){
button2state = true;
}
else{
button2state = false;
}
if(button3value>lowthreshold){
button3state = true;
}
else{
button3state = false;
}
if(button4value>lowthreshold){
button4state = true;
}
else{
button4state = false;
}
if(Serial.available()) {
// Serial.println("serial");
while(Serial.available()) {
// Serial.println("reading");
byteread=Serial.read();
//Serial.print(byteread);
Inputdata +=byteread;
delay(10);
}
Serial.println(Inputdata);
if(Inputdata.indexOf("25511120102551112000")>=0){
Serial.println("up");
button2state = true;
serialdelay = 3000;
}
if(Inputdata.indexOf("25511120202551112000")>=0){
Serial.println("down");
button3state = true;
serialdelay = 3000;
}
if(Inputdata.indexOf("25511120402551112000")>=0){
Serial.println("up");
button2state = true;
serialdelay = 3000;
}
if(Inputdata.indexOf("25511120802551112000")>=0){
Serial.println("down");
button3state = true;
serialdelay = 3000;
}
if(Inputdata.equals("25511121002551112000")){
Serial.println("Stop");
button1state = false;
button2state = false;
button3state = false;
button4state = false;
serialdelay = 0;
}
Inputdata = "";
}
else{
serialdelay = 0;
}
// Serial.println(String(button1state)+String(button2state)+String(button3state)+String(button4state)+":"+String(timestamp1)+"|"+String(runningtime)+"|"+String(runningstate));
if((button2state == true) or (button3state == true))
{
waitingstatus = false;
if(button2state==true)
{
runningstate = 2;
}
else
{
runningstate = 3;
}
}
else
{
if ((runningstate == 2) or (runningstate == 3))
{
runningstate = 0;
}
}
if(button1state==true)
{
if (runningstate != 1)
{
runningstate = 1;
runningtime= millis();
}
}
if(button4state==true)
{
if (runningstate != 4)
{
runningstate = 4;
runningtime= millis();
}
}
timestamp1=millis();
if (runningstate == 0)
{
//turn motor off
digitalWrite(relay1, LOW);
digitalWrite(relay2, LOW);
runningtime = 0;
Serial.println("stopped");
}
if (runningstate == 1)
{
//turn motor forward until counter
if((timestamp1-runningtime) < fullruntimeopen)
{
if((timestamp1-runningtime) > waittimeopen)
{
digitalWrite(relay1, HIGH);
digitalWrite(relay2, LOW);
Serial.println("forward timer");
waitingstatus = false;
}
else
{
Serial.println("forward waiting");
waitingstatus = true;
}
}
else
{
digitalWrite(relay1, LOW);
digitalWrite(relay2, LOW);
runningstate = 0;
runningtime = 0;
Serial.println("stopping from forward");
}
}
if (runningstate == 2)
{
//turn motor forward
digitalWrite(relay1, HIGH);
digitalWrite(relay2, LOW);
Serial.println("forward");
}
if (runningstate == 3)
{
//turn motor backwards (close)
digitalWrite(relay1, LOW);
digitalWrite(relay2, HIGH);
Serial.println("backwards");
}
if (runningstate == 4)
{
//turn motor backwards until counter
if((timestamp1-runningtime) < fullruntimeclose)
{
if((timestamp1-runningtime) > waittimeclose)
{
digitalWrite(relay1, LOW);
digitalWrite(relay2, HIGH);
Serial.println("backwards timer");
waitingstatus = false;
}
else
{
Serial.println("backwards-waiting");
waitingstatus = true;
}
}
else
{
digitalWrite(relay1, LOW);
digitalWrite(relay2, LOW);
runningstate = 0;
runningtime = 0;
poolopenstate = true;
Serial.println("stopping from backwards");
}
}
}
delay(200);
delay(serialdelay);
}
