LED with WeAct Black Pill STM32F411CE

Wiring for the LED with 220 Ω resistor on the WeAct Black Pill STM32F411CE (STM32F411CE, 3.3 V logic), chosen with the same pin rules BoardPilot uses: default buses first, and no pins that are used for flash, USB, the debugger or booting.

Wiring

LED pin	Role	WeAct Black Pill STM32F411CE pin	Notes
A	Input to the part	B12 (PB12)	Anode (long leg), through the resistor to a GPIO
K	Ground	G	Cathode (short leg, flat side)

Check before you power it on

Test code (Arduino)

void setup() {
  pinMode(PB12, OUTPUT);  // A on B12
}

void loop() {
  digitalWrite(PB12, HIGH);
  delay(500);
  digitalWrite(PB12, LOW);
  delay(500);
}

Arduino board: STMicroelectronics:stm32:GenF4:pnum=BLACKPILL_F411CE,usb=CDCgen,upload_method=dfuMethod. To upload over USB, hold BOOT0, press and release NRST, then release BOOT0 (DFU mode). An ST-LINK on the SWD pins also works.

Questions

Which WeAct Black Pill STM32F411CE pins do I use for the LED?

A → B12 (PB12), K → G.

Does the LED work with the WeAct Black Pill STM32F411CE at 3.3 V?

Yes: the LED runs at 3.3 V and the WeAct Black Pill STM32F411CE uses 3.3 V signals, so no level shifting is needed.

BoardPilot checks this wiring in 3D as you build it, and finds crossed or missing wires on the real board.

Download BoardPilot

Full WeAct Black Pill STM32F411CE pinout · LED with 220 Ω resistor: all pins and data

The LED on other boards

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