Arduino for STM32

Hi,

Yes, you are right - my crystal have 12MHz frequency and I missed this.

The fix is pretty simple - just by adding to the boards.txt for appropriate board/variant next config:
Thank you for your help

Hi,

Yes, you are right - by default there is no variant for F411VE available, but it is actually exists in variant files via path "variants\STM32F4xx\F411V(C-E)T", so I've added it according to the tutorial.

I'm not sure how correctly check to which pins mapped default Serial, but anyway it used ...

Hi, I'm trying to migrate from 1.9.0 to 2.4.0 arduino core and have an issue with usart.
Initialization:

#define TX_PIN PA15
#define RX_PIN PB3
HardwareSerial hws(RX_PIN, TX_PIN);
const char data[] = {0xAA, 0x00, 0xFF};

void setup()
{
Serial.begin(115200);
hws.begin(19200, SERIAL_8N1);
}

Loop ...