in reply to Win32 Serial Read input from device

Hi PilotinControl,

I have the facilities to test this (I believe), but before I dig deep into your code, it would help if you could advise what the device is at the other end, so I can grasp what it may return.

At minimum, please post what the return is, verbatim, if the device is far from standard (still handy to say what it is however).

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Re^2: Win32 Serial Read input from device
by PilotinControl (Pilgrim) on Mar 26, 2018 at 22:27 UTC
    The device at the other end is an Arduino Mega connected via USB and a pushbutton connected to the arduino. On the computer side is the Perl Program....I can send a command 1 or 2 and it will change LEDS on the arduino....if the button connected to the arduino is pressed it should post: Button Pressed on the serial terminal window on the computer end. It does not...it does however if the enter button is pressed it displays Button Pressed.
[reply]

      Now we're talking.

      How long is the Arduino sketch? If you can narrow it down to a reasonable size, post it here. There are people familiar with that platform who can help.

      By looking at your sketch, it should be trivial enough for someone to throw together a complete hardware test platform to simulate what you're doing, and help you figure out the problem.

[reply]
        Below is the simple arduino sketch thanks for looking into this. 
        
#define relay1a   3
#define relay1b   2
#define  button   4
#define SIG_R_1   5
#define SIG_G_1   6
#define SIG_R_2   7
#define SIG_G_2   8
#define SIG_MG_1  9
#define SIG_MY_1 10

int buttonState;
int lastButtonState = LOW;
int flag = 0;

unsigned long lastDebounceTime = 0;  //last time the pin was toggled, 
+used to keep track of time
unsigned long debounceDelay    = 100; //the debounce time which user s
+ets prior to run

void setup() {
Serial.begin(9600);
pinMode(relay1a,  OUTPUT);
pinMode(relay1b,  OUTPUT);
pinMode(SIG_R_1,  OUTPUT);
pinMode(SIG_G_1,  OUTPUT);
pinMode(SIG_R_2,  OUTPUT);
pinMode(SIG_G_2,  OUTPUT);
pinMode(SIG_MG_1, OUTPUT);
pinMode(SIG_MY_1, OUTPUT);
pinMode(button,    INPUT);

// SET RELAYS

digitalWrite(relay1a,   LOW);
digitalWrite(relay1b,  HIGH);
digitalWrite(SIG_R_1,   LOW); 
digitalWrite(SIG_G_1,  HIGH); 
digitalWrite(SIG_R_2,  HIGH); 
digitalWrite(SIG_G_2,   LOW);
digitalWrite(SIG_MG_1, HIGH);
digitalWrite(SIG_MY_1,  LOW);
delay(500);
digitalWrite(relay1a,  HIGH);
digitalWrite(relay1b,   LOW);
digitalWrite(SIG_R_1,  HIGH);
digitalWrite(SIG_G_1,   LOW); 
digitalWrite(SIG_R_2,   LOW); 
digitalWrite(SIG_G_2,  HIGH); 
digitalWrite(SIG_MG_1,  LOW);
digitalWrite(SIG_MY_1, HIGH);
delay(500);
digitalWrite(relay1a,   LOW);
digitalWrite(relay1b,  HIGH);
digitalWrite(SIG_R_1,   LOW); 
digitalWrite(SIG_G_1,  HIGH); 
digitalWrite(SIG_R_2,  HIGH); 
digitalWrite(SIG_G_2,   LOW);
digitalWrite(SIG_MG_1, HIGH);
digitalWrite(SIG_MY_1,  LOW); 
delay(500);
digitalWrite(relay1a,  HIGH);
digitalWrite(relay1b,   LOW);
digitalWrite(SIG_R_1,  HIGH);
digitalWrite(SIG_G_1,   LOW); 
digitalWrite(SIG_R_2,   LOW); 
digitalWrite(SIG_G_2,  HIGH); 
digitalWrite(SIG_MG_1,  LOW);
digitalWrite(SIG_MY_1, HIGH);
delay(500);
digitalWrite(relay1a,  HIGH);
digitalWrite(relay1b,  HIGH);
digitalWrite(SIG_R_1,   LOW); // RED MAIN OFF
digitalWrite(SIG_G_1,  HIGH); // GREEN MAIN ON
digitalWrite(SIG_R_2,  HIGH); // RED SIDING ON
digitalWrite(SIG_G_2,   LOW); // GREEN SIDING OFF
digitalWrite(SIG_MG_1, HIGH); // GREEN MAIN ON
digitalWrite(SIG_MY_1,  LOW); // YELLOW MAIN OFF
} // END SETUP

void loop() {
int reading = digitalRead(button);

if (reading != lastButtonState)  {
lastDebounceTime = millis();
}

if ((millis()-lastDebounceTime) > debounceDelay) {
if (reading != buttonState) {
buttonState = reading;
if (buttonState == HIGH) {
if (flag == 0) {
digitalWrite(SIG_R_1,  HIGH); 
digitalWrite(SIG_G_1,   LOW); 
digitalWrite(SIG_R_2,   LOW); 
digitalWrite(SIG_G_2,  HIGH);
digitalWrite(SIG_MG_1,  LOW);
digitalWrite(SIG_MY_1, HIGH);
digitalWrite(relay1a, LOW); // ON
delay(50);
digitalWrite(relay1a, HIGH); // OFF
flag = 1;
Serial.println("BONE\r");
//ledState = !ledState;
} // IF FLAG 0
else if (flag == 1){
digitalWrite(SIG_R_1,   LOW); 
digitalWrite(SIG_G_1,  HIGH); 
digitalWrite(SIG_R_2,  HIGH); 
digitalWrite(SIG_G_2,   LOW); 
digitalWrite(SIG_MG_1, HIGH);
digitalWrite(SIG_MY_1,  LOW);
digitalWrite(relay1b, LOW); // ON
delay(50);
digitalWrite(relay1b, HIGH); // OFF
flag = 0;
Serial.println("BTWO");
} // IF FLAG TWO
} // IF BUTTON STATE
} // IF READING
} // IF MILLIS
lastButtonState = reading;

// TEST SERIAL

if(Serial.available() > 0) { 
int in      = Serial.read(); // PERL TEST
switch(in) {

case '1':
digitalWrite(SIG_R_1,  HIGH); 
digitalWrite(SIG_G_1,   LOW); 
digitalWrite(SIG_R_2,   LOW); 
digitalWrite(SIG_G_2,  HIGH);
digitalWrite(SIG_MG_1,  LOW);
digitalWrite(SIG_MY_1, HIGH);
digitalWrite(relay1a, LOW); // ON
delay(50);
digitalWrite(relay1a, HIGH); // OFF
break;

case '2':
digitalWrite(SIG_R_1,   LOW); 
digitalWrite(SIG_G_1,  HIGH); 
digitalWrite(SIG_R_2,  HIGH); 
digitalWrite(SIG_G_2,   LOW); 
digitalWrite(SIG_MG_1, HIGH);
digitalWrite(SIG_MY_1,  LOW);
digitalWrite(relay1b, LOW); // ON
delay(50);
digitalWrite(relay1b, HIGH); // OFF
break;
} // END SWITCH 
} // END SERIAL
// END TEST SERIAL

} // END LOOP

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