Morning Guys
I am new to Arduino. I have written the following code for Arduino ohm meter. Code is simply driving a potential divider circuit measuring four resistors (R1, R2, R3, R4):
+5V..........R2..........220ohm........GND
+5V..........R3..........220ohm........GND
+5V..........R4..........220ohm........GND
+5V..........R5..........220ohm........GND
A push button is used to start the test. Green LED (gLed) and Red LED (redLed) represent PASS or FAIL.
I only want green LED to turn on when resistance test passes, and Red LED when test fails.
For some reason Red LED keeps blinking even when the test is not in progress (push button not ON)
I have made several changes in the code to rectify the problem, but all in vain.
Can you please have a look to see where problem lie. I am using Arduino UNO board btw.
int buttonInput = 0;
int buttonState1 = 1;
int buttonState2 = 1;
int selector = 1;
int selState = 0;
//int selector2 = 2;
//int selState2 = 0;
int analogPin0 = 0;
int analogPin1 = 1;
int analogPin2 = 2;
int analogPin3 = 3;
int redLed = 12;
int gLed = 13;
int raw1 = 0;
int raw2 = 0;
int raw3 = 0;
int raw4 = 0;
int Vin = 4.950;
float Vout = 0;
float Vout1 = 0;
float Vout2 = 0;
float Vout3 = 0;
float R1 = 218;
float R2 = 0;
float R3 = 0;
float R4 = 0;
float R5 = 0;
float buffer = 0;
void setup() {
pinMode(redLed, OUTPUT);
pinMode(gLed, OUTPUT);
pinMode(buttonInput, INPUT);
// digitalWrite(buttonInput, HIGH);
pinMode(selector, INPUT);
}
void loop() {
buttonState1 = digitalRead(buttonInput);
delay(10);
buttonState2 = digitalRead(buttonInput);
if (buttonState1 == buttonState2 == HIGH){
raw1 = analogRead(analogPin0);
buffer = raw1 * Vin;
Vout = (buffer) / 1024.0;
buffer = (Vin / Vout) - 1;
R2 = R1 * buffer;
raw2 = analogRead(analogPin1);
buffer = raw2 * Vin;
Vout1 = (buffer) / 1024.0;
buffer = (Vin / Vout1) - 1;
R3 = R1 * buffer;
raw3 = analogRead(analogPin2);
buffer = raw3 * Vin;
Vout2 = (buffer) / 1024.0;
buffer = (Vin / Vout2) - 1;
R4 = R1 * buffer;
raw4 = analogRead(analogPin3);
buffer = raw4 * Vin;
Vout3 = (buffer) / 1024.0;
buffer = (Vin / Vout3) - 1;
R5 = R1 * buffer;
//delay(1000);
selState = digitalRead(selector);
if (selState == HIGH) {
if (R2 < 1 || R3 < 1 || R4 < 1 || R5 < 1) {
digitalWrite(gLed, HIGH);
delay(1000);
digitalWrite(gLed, LOW);
}
else if (selState = LOW);
//selState2 = digitalRead(selector2);
{
if (R2 < 1 || R3 < 1 || R4 < 1) {
digitalWrite(gLed, HIGH);
delay(1000);
digitalWrite(gLed, LOW);
}
else {
digitalWrite(redLed, HIGH);
delay(1000);
digitalWrite(redLed, LOW);
}
}
}
}
}
