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I am having this problem below:

https://drive.google.com/file/d/1F1joXc9xppFWRRqxWaaC7izRNaSnVaYc/view?usp=sharing

I already searched this problem here and in other foruns, and it seems to be a quite frequent problem, although I still cannot solve it. The arduino is the Pro Mini and it is connected to a FTDI adapter

1- The communication is working perfectly;

2- The baud-rate is the same in the script and in the seriel monitor (as you can see in the image above);

3- I already uninstall the Java and install it again, but still giving me the same problem in the Arduino IDE serial monitor;

4- I'm quite sure that the problem is related with the Java/Arduino serial communication, something related with RXTX communication and Arduino... Maybe I must use PuTTY but I do not know if it is a good solution. I do not know what to do...

Have you ever had this problem before? What do you think I can do?

Eduardo
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    Please don't link your problem to a 3rd party site. Many are blocked from viewing such content (as I am). – ggb667 Feb 24 '20 at 19:24
  • Are you sure you have chosen the correct COM port in the Serial Monitor? Try changing the cable between arduino and the serial monitor. – whiplash Feb 24 '20 at 20:05

1 Answers1

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I already know what the problems was!

I selected the wrong processor definitions: ATMEGA328 (5V, 16MHz) instead of ATMEGA328 (3.3V, 8MHz) ...

Eduardo
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