Push button with WeAct Black Pill STM32F411CE

Wiring for the Push button 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

Push button pin	Role	WeAct Black Pill STM32F411CE pin	Notes
1	Output from the part	B12 (PB12)	To a GPIO; use INPUT_PULLUP in code
2	Ground	G

Check before you power it on

Test code (Arduino)

void setup() {
  Serial.begin(115200);
  pinMode(PB12, INPUT_PULLUP);  // pressed = LOW
}

void loop() {
  Serial.println(digitalRead(PB12) == LOW ? "pressed" : "released");
  delay(100);
}

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 Push button?

1 → B12 (PB12), 2 → G.

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

Yes: the Push button 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 · Push button: all pins and data

The Push button on other boards

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