Problems_Serial1

[DIego]

Hi,
I was testing the serial1 teensy 3.0 with the following code:

void setup()
{  Serial.begin(9600);
   Serial1.begin(9600);
   
};
void loop(){
Serial.println("arduino");
Serial1.println("arduino");

delay(1000);
};

I used the trendnet TU-S9 to read the serial1 and get this:


i dont understand why write that. I'm printing "arduino"

Thanks for any help

 

[PaulStoffregen]

Teensy 3.0 has 3.3V TTL level signals.

The TU-S9 has +/- 12V RS232 level signals.

Are you using a MAX232 or similar TTL to RS-323 chip to convert Teensy's signals to the type needed for that RS232 cable? This serial monitor output looks like the small signal from Teensy3 is being received by the TU-S9, but the TTL level output uses the opposite polarity. Even just a logic-level inverter might do the trick, if you don't have a proper RS-232 driver chip.

 

[DIego]

Thanks for the fast reply
I will use your suggestions to solve the problem
Ty

 

[Brian14]

I am also this type of problem, shall i provide my string here

 

[defragster]

I am also this type of problem, shall i provide my string here

Text and details can be posted here if not SPAM or bogus links