I am trying a simple program like this: void setup() { Serial.begin(115200); Serial.println("Test"); } void loop () { } But my Serial Monitor is not working and other Forums are saying to turn off DTR & RTS on Serial Monitor Setting but I can't find , can some on help please?

[image] foltynfan: I don't understand 'OS' Sorry about that. It is an acronym for "operating system". I normally try to avoid the use of undefined acronyms in my writing but I slipped up this time. I'll try to keep it in mind while providing support to others in the future. [image] folty…

Yes, :wink: I am so happy :smiley: it works. Thank you for all of your guys help especially ptillisch.

[image] TinManSA: That would be at hardware level in your Device Manager if you are using Windows. Don't bother with that, reinstall Arduino IDE And you TinManSA you have been a really helpful person because it felt like reinstalling the ide helped so I have to say thanks :wink: …

You are welcome. I'm glad if I was able to be of assistance. Enjoy! Per

I realize that this is over a month old, but I thought that I'd share my findings. I've been building projects in Arduino for years now. I just got into ESP32 this week. LOL I've run into the same Serial.println not printing already. It took me a little while to figure out why it was not printin…

It is late, but jut incase someone else sees this. Lillygo is using genuine USB hardware serial ports on the chip. In order to use the USB serial port, under TOOLS/USB CDS on boot must be enabled. By default it is DISABLED. What this does is to tell the IDE to switch to using the hardware USB for…

Since I was searching for this issue before I figured out I was having a [Dur-Duh-Dur] moment, I thought I would make this commit in the event someone else is beating their head against the wall for the same issue. It turned out that I was trying to use GPIO1 and GPIO3 for sensors until I realized I…

THIS was the solution to my problem, I was using GPIO1/3 TX0RX0 for my input. To me, this post made my day, especially after reading through so many many suggestions. Thank you so much @badonj !

I couldn´t Serial print on a Wemos D1 Mini ESP32 clone. Adding a 1000ms delay BEFORE Serial.begin made it work. Thanks BlondieSL!

That is what we are all here for. Sometimes when you spend a long time trying to solve an issue and figure it out, I think it is best to just post it and share with the class anyway, :). That is how you found it.

Serial Monitor Not Working On Esp32(SOLVED)

Development Tools IDE 1.x

Topic		Replies	Views
App crashes when using ESP32 boards IDE 2.x	54	386	June 21, 2026
ESP32-C3 Serial.print() doesn't work! 3rd Party Boards	5	255	March 8, 2026
ESP32C3 supermini -> no serial monitor output Programming	2	1229	July 6, 2025
ESP32 hangs when serial monitored Interfacing w/ Software on the Computer	24	419	May 18, 2026
I use ESP32-S3, but Arduino IDE serial monitor doesn't output IDE 1.x	11	8988	August 1, 2025

Serial Monitor Not Working On Esp32(SOLVED)

Related topics