Why, when I transmit data (string, byte ,etc.) from Serial1, they are incorrect?
For example: I transmit string "Hello" and received in char: «:: and same in hex: AB 3A 3A A 2
However transmit from Serial is correct!
Serial1.begin(9600);
Serial1.print("Hello");
Where are you transmitting to?
How are you receiving the data?
Where is your sketch?
I received data on PC in special program as terminal.
For transmit I use the arduino mega 2560. When I transmit data from standard port - Serial (without number), data received on PC is correct. string = string, byte = byte.
When I transmit data from Serial 1 or 2 or 3, data received on PC is incorrect: string <> string, byte <> byte!
Full sketch:
void setup(){
Serial.begin(9600);
Serial1.begin(9600);
//Transmit data
Serial.println("Hello"); //COM5
Serial1.println("Hello"); //COM1
}
void loop(){
}
And recivied data:
in HEX
in CHAR
Yes, but only Serial goes to the computer via the USB interface. How do you have it physically connected?
With null-modem cable, precisely I use only 3 pins (Tx, Rx ,Gnd).
But I need receive data from another device, and information must be correct!
Did you used the voltage level converter like max232 (TTL <-> RS232)?
Oh, I completely forgot about it! No I connected it directly!
Thanks to everybody. Problem has detected! I forgot about level converter.
With it data is correct.