Serial Monitor invalid characters at Start[closed]

Hello,
at Startup I had invalid characters in Serial Monitor

Here my Settings and my Code

void setup()
{
Serial.begin(115200);
Serial.println(“”);
Serial.println(“start”);
}

Platform.ini
[env:nodemcuv2]
platform = espressif8266
board = nodemcuv2
framework = arduino
upload_speed = 921600
monitor_speed = 115200

What can I do ?

Duplicate of

Thanks, that it. :slight_smile:

void setup()
{
Serial.begin(74880);
Serial.println(“”);
Serial.println(“start”);
}

[env:nodemcuv2]
platform = espressif8266
board = nodemcuv2
framework = arduino
upload_speed = 921600
; Serial Monitor options
monitor_speed = 74880

and th Output
invalidChars