Can't see printed statements in Serial Monitor

PlatformIO IDE
1

Hello!
I recently installed PlatformIO for Vscode and I am running into an issue where I cannot see my Serial.println comments in the Serial Monitor.
I made sure to do monitor_speed in the ini file.
Here is my code:

1
1583×941 26 KB

Everything compiles just fine and when I open the Serial Monitor up, I see nothing.

1 Like
2

Hi

U’re probably missing an entry in your platformio.ini file, some thing like

monitor_speed = 115200

Try something simple first in PlatformIO, it has a steep learning curve.

Below are my platformio.ini and main.cpp contents for a BlinkLed and ‘SerialHello’…

; PlatformIO Project Configuration File
;
;   Build options: build flags, source filter
;   Upload options: custom upload port, speed and extra flags
;   Library options: dependencies, extra library storages
;   Advanced options: extra scripting
;
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html
[env:nanoatmega328]
platform = atmelavr
board = nanoatmega328
framework = arduino

;monitor_port = COM12
monitor_speed = 115200

main.cpp

#include <Arduino.h>

void setup()
{
	// initialize LED digital pin as an output.
	pinMode(LED_BUILTIN, OUTPUT);

	Serial.begin(115200);
}

void loop()
{
	Serial.println("Hello world");
	// turn the LED on
	digitalWrite(LED_BUILTIN, HIGH);
	// wait for a second
	delay(500);
	// turn the LED off
	digitalWrite(LED_BUILTIN, LOW);
	// wait for a second
	delay(500);
}
1 Like
3

Same issue here.

Trying the simplest code and nothing shows up.

#include <Arduino.h>

void setup (void)
{
    Serial.begin(115200);
    delay(500);

    Serial.print("Inicializando...\n\n");

}

void loop (void)
{
    delay(1000);
}

platformio.ini:

[env:esp32doit-devkit-v1]
platform = espressif32
board = esp32doit-devkit-v1
framework = arduino
upload_port = /dev/cu.SLAB_USBtoUART
upload_speed = 115200
monitor_port = /dev/cu.SLAB_USBtoUART
monitor_speed = 115200

What’s missing?

Thank you.
Regards, Ciro.

4

Now I found out the issue I’ve just reported doesn’t regard Serial.print itself.

The problem is related to the code flashing. Despite the [SUCCESS] report, the code is never flashed to the device.

I’ve tried to check with an ordinary serial monitor. When I try to flash with VSCode+PlatformIO, no Serial.print message is shown. But when I flash with Arduino IDE, all serial messages appear normally.

?!

Have you got any idea what might be happening?

Thank you.
Regards,
Ciro

5

Instead of

Serial.print

try

Serial.println

Does that help?