Hey guys, 
I`m not new to Arduino and already programmed a whole lot of things, but this is the first time I need to consult the forum because I`m running nuts.

I`ve a pice of code, which perfectly works in the Arduino IDE. Here I can read out the serial bus 1 and the strMessage variable contains all input afterwards. By using Serial.print() the output gets printed without a problem.

#define PIN_READ_WRITE 7

void setup()
{
	Serial.begin(115200);
	Serial1.begin(115200);
	pinMode(PIN_READ_WRITE, OUTPUT);
}

String strMessage = "";
void loop()
{
	String strMessageTmp = strMessage;
	while(Serial1.available())
	{
	    char c = Serial1.read();
		strMessage += c;
	}

	if (strMessageTmp != strMessage)
	{
		Serial.print(strMessage);
		delayMicroseconds(80);
	}

}
 

Example: I run the firmware, send "ABCDE" to the Serial port 1 and receive "ABCDE" on the other Serial output 0.

Now here is the problem:

Due to the fact that I`d like to code more C++ sytle, I installed VisualMicro on my visual studio and I run exactly the same code.
but the result ist not "ABCDE", it gets all chars delivered to the Serial port but when I print the result, I only get A on the out.  But on each output iteration only a single "A".

Is there anybody with experience in using VisualMicro and has already has such problems before?

I spend some time now, trying out some things and realized the following behaviour:

1. I have changed the serial.print() to serial.println()

Now, the following things happen:

Case 1: (the one before)
I transmit a single char and get: there is always a single char output, but always the first one I transmitted:
Example:
I transmit one char after another ( with a few seconds time inbetween ) 'A', 'B', 'C', 'D' and get output: AAAAAAAAA

Case 2:
I use println() instead of print()
I transmit a single char and end up with the same result as before, but after the first char delivered the println() command jumps into the next line after 
result:
A
AAAAAAAAAAAAAAA


Case 3:
I use println() instead of print()
I transmit 'ABDC' as one command and get the output:
A
ABCD

Now I change the code a bit to:

while(Serial1.available())
	{
	    char c = Serial1.read();
            Serial.print(c);
	}
 

 
which works fine, but only if I output one char after another. As soon as I want to do something with the received char ( to += onto a String for example ) I`m not able to do that ( it just doesn`t appear in the string, the compiler takes it, but the char doesn`t get added to the string )

This lead me to another test:

while(Serial1.available())
	{
	    int c = (int) Serial1.read();
            Serial.println(c);
	}
 

  

And: surprise surprise, all chars I transmit get received and printed, BUT for each line of a char, I also get a second line with a 0 in it.

Example: 
I transmit 'a', 'b', 'c', 'd' with some time inbetween and get:
97
0
98
0
99
0
100
0

So, for every char I receive, I also get a '0' and that seems to be the problem for the += operator in the string.


- Any thoughts what I can do?
- any workaround?
- can I shut off the debugger to solve the problem?

By playing around a bit, I found a workaround which seems to work:

I changed the while Loop a bit and read out an int value, because then I get the 0 delivered as well. After reading and attaching the int value (converted to char) I check for the zero and throw it away if it is a zero. By using this detour I can guarantee, that the string never gets destroyed by the 0.

String strMessage = "";
while(Serial1.available())
	{
	    int c = (int)Serial1.read();
	    if (c!=0)
		{
			strMessage += (char)c;
		}
	}
 

It works fine, but this "zero"-check is not needed in the Arduino IDE but in Visual Micro.

I also send you the lines of code, but as written in the eMail, the code posted on top is actually everything that is needed to reproduce the problem any time.

The .Net SerialReader double Byte seems to have something to do with it.

Thank you for everything. I`m looking forward to further Progress on VisualMicro.