Arduino_core_stm32: Serial doesn't work on a Nucleo L432KC

[fivdi]

The below program should blink the built-in LED and and print "Hello, World!" to Serial every two seconds. On a Nucleo L432KC it does blink the built-in LED but it doesn't print "Hello, World!" to Serial. On a Nucleo F303K8 or Nucleo F411RE the program functions correctly, the built-in LED blinks and "Hello, World!" is printed to Serial.

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  Serial.println("Hello, World!");

  digitalWrite(LED_BUILTIN, HIGH);
  delay(50);
  digitalWrite(LED_BUILTIN, LOW);
  delay(1950);
}

• Version of STM32 Core: 1.3.0
• Version of Arduino; 1.8.5
• operating system: Ubuntu 16.04
• Tools menu settings
  
  
  
  • Board: "Nucleo-32"
  
  
  • USB interface: "None"
  
  
  • Optimize: "Smallest (-Os default)"
  
  
  • Board part number: "Nucleo L432KC"
  
  
  • Serial interface: "Enabled with generic serial"
  
  
  • Upload method: "Mass Storage"
  
  
  • Port: "/dev/ttyACM1"
  
  

[fpistm]

Hi @fivdi
Right, there is an issue with 1.3.0 with serial.
See https://github.com/stm32duino/Arduino_Core_STM32/commit/c322ae509c8b7c116be529d6b168ef917f043d8e
This fix this issue.

[fivdi]

@fpistm yes, that fixes it, thanks.

[gcormier]

Came here looking for exactly for this. Target date for 1.3.1 at all?

[fpistm]

Hi, this will be the 1.4.0 and it should be in one or 2 weeks

[projetandonoape]

It still not working for me, even with all that mentioned changes above:(
Serial communications only works on version 1.2.0

[fpistm]

Hi @projetandonoape
With this fix it should work. I guess you have other issue but I can't guess which one without any info.
I will release 1.4.0 next week so I advise to wait and then test.