Serial Monitor Arduino Not Working In Arch Linux

I had difficulty when I first used Arduino IDE on Arch Linux, before I used Arduino IDE on Ubuntu and everything went smoothly.
I feel confused by this situation, Serial Monitor Arduino Not Working. Data from the microcontroller does not appear in the Serial Monitor.
Serial Monitor Testing Program Code
I tried with the Arduino blink example program that I modified as follows:
/* Blink Turns an LED on for one second, then off for one second, repeatedly. Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to the correct LED pin independent of which board is used. If you want to know what pin the on-board LED is connected to on your Arduino model, check the Technical Specs of your board at: https://www.arduino.cc/en/Main/Products modified 8 May 2014 by Scott Fitzgerald modified 2 Sep 2016 by Arturo Guadalupi modified 8 Sep 2016 by Colby Newman This example code is in the public domain. http://www.arduino.cc/en/Tutorial/Blink */ // the setup function runs once when you press reset or power the board void setup() { // initialize digital pin LED_BUILTIN as an output. pinMode(LED_BUILTIN, OUTPUT); Serial.begin(9600); } // the loop function runs over and over again forever void loop() { Serial.println("ON"); digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second Serial.println("OFF"); digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second }
I opened the serial monitor and did not get Serial data as shown in the following image:
Why Serial Monitor Arduino Not Working In Linux?
I find out in forums of why this is not working. And I found the problem in Arch Linux is in the java version.
Here is the version that I am using:
I am using Arduino Version 1.8.12 and using Java version JDK 8. Then I double-check whether in my Arch Linux there is another java version. I checked using the terminal:
How to Fix Serial Monitor Arduino Not Working?
It turned out that on my computer there are two versions of java, Java 8 and Java 13. By default Java is Java 8. Then I set Java to Java 13, with the command:
After that, check again whether the java used has become Java 13? Use the following command:
Restart your Arduino IDE. Then I reopened Serial Monitor and Success. But for the Serial Monitor display is not as beautiful as in Java 8. But thankful this has been successful.
Now I have fixed the Arduino Serial Monitor Not Working. Hopefully this article is useful. That's all.
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