Question

please help me with the Question below.

please explain to me how arduino connections with the breadboard can be used to measure a few basic parameters of water quality?

i paragrah is okay for me in your answer.

Answer 1

Hardware:-

1.Arduino MKR1000 * 1

2.4.7k ohm resistor * 2

3.Dupont Line * 3

4. 2P 2.54mm connector Line * 1

5. 2.54mm gold plated pin 2P * 2

Connections:

Code:-
void loop() {
 // start
 digitalWrite(ledPin, HIGH);
 //port LL
 digitalWrite(port1, LOW);
 digitalWrite(port2, LOW);
 sensorValue1 = analogRead(sensorPin);
 delay(delaytime);
 //port LH
 digitalWrite(port1, LOW);
 digitalWrite(port2, HIGH);
 sensorValue2 = analogRead(sensorPin);
 delay(delaytime);
 digitalWrite(ledPin, LOW);
 //port HH
 digitalWrite(port1, HIGH);
 digitalWrite(port2, HIGH);
 sensorValue3 = analogRead(sensorPin);
 delay(delaytime);
 //port HL
 digitalWrite(port1, HIGH);
 digitalWrite(port2, LOW);
 sensorValue4 = analogRead(sensorPin);   
 delay(delaytime);
 Serial.print(sensorValue1);
 Serial.print(",");
 Serial.print(sensorValue2);
 Serial.print(",");
 Serial.print(sensorValue3);
 Serial.print(",");
 Serial.print(sensorValue4);
 Serial.println();
}

Result:-

1. Gold plated pin is out of water

2. Pin in clean water

3. Pin in non-pure water

Analysis

When pin in clean water, data is

"159, 434, 874, 601"

"163, 433, 873, 600"

"165, 436, 871, 598"

When pin in non-pure water data is

"159, 462, 876, 566"

"159, 465, 878, 564"

"158, 463, 878, 565"

Here the 1st and 3rd are close at each sample, 2nd and 4th have 25~30 count gap.