serial data transfer between arduino uno and arduino micro

Using Arduino Networking, Protocols, and Devices
1

Ok this is what I have done:

It is exaclty the same other people have done but I do not know what I have done wrong:

Arduino UNO: TX--> RX of arduino micro
Arduino UNO: RX ---> TX of arduino micro.
common GND.

Code for arduino uno: (sender)

void setup()
{
 Serial.begin(9600); 
}

void loop()  {
 
  //--- display the character just sent on console ---
  Serial.println( "Hello world" );
delay(1000);
  
}

Code for receiver (micro):

void setup()
{
 Serial.begin(9600); 

}

void loop()  {
 if (Serial.available() > 0) {
    int temp=Serial.read();
    Serial.println(temp);
 } else {
    Serial.println("Not available data");
 } 
 delay(1000);
}

and I do see not available data.

What am I missing?

2

Arduino UNO: TX--> RX of arduino micro
Arduino UNO: RX ---> TX of arduino micro.

and I do see not available data.

What am I missing?

What no Arduino Uno ground pin ---> ground pin of arduino micro?

The Rx and Tx signal lines only create electrical signals if there is a common ground circuit between the two boards.

Lefty

3

Yews sorry i have done this also. I forgot to mention it..

In both of the boards the TX led is blinking.

4

Then I'm out of ideas. Software looks pretty basic and OK.

Lefty

5

retrolefty:
Then I'm out of ideas. Software looks pretty basic and OK.

Lefty

Try it with two Arduino Uno and it works. Does it mean that my micro is problematic or I missed something about micro that I should do?

6

Try it with two Arduino Uno and it works. Does it mean that my micro is problematic or I missed something about micro that I should do?

Yes, you have missed something. The Micro is like the Leonardo. The TX and RX pins are not connected to the Serial instance. They are connected to the Serial1 instance, which is separate from the USB-to-serial converter instance that Serial is connected to.

7

i connected to the pins 0-Tx, 1-Rx as shown in http://www.google.gr/imgres?imgurl=http://arduino.cc/en/uploads/Main/ArduinoMicro_pinout.png&imgrefurl=http://arduino.cc/en/Main/ArduinoBoardMicro&h=322&w=256&sz=39&tbnid=YaVYHo0WmFot9M:&tbnh=91&tbnw=72&zoom=1&usg=__8PNYmRdmUIQeCZqXA7yTceWVOag=&docid=JjYvdDtLKAQbDM&sa=X&ei=8RrsUO3xGu3M0AWD1YH4Aw&ved=0CDIQ9QEwAA&dur=765

What do you mean by Serial1? In my code i should replace Serial.read() with Serial1.read()?

8

In my code i should replace Serial.read() with Serial1.read()?

On the Micro, yes.