L298N with WeAct Black Pill STM32F411CE

Wiring for the L298N dual motor driver 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

L298N pin	Role	WeAct Black Pill STM32F411CE pin	Notes
ENA	Input to the part	B12 (PB12)	Motor A speed (PWM). Remove the jumper to use it
IN1	Input to the part	B13 (PB13)	Motor A direction
IN2	Input to the part	B14 (PB14)	Motor A direction
IN3	Input to the part	B15 (PB15)	Motor B direction
IN4	Input to the part	A8 (PA8)	Motor B direction
ENB	Input to the part	B10 (PB10)	Motor B speed (PWM). Remove the jumper to use it
12V	Not wired to the board	not connected	Motor supply 5 to 35 V from a separate supply
GND	Ground	G
5V	Not wired to the board	not connected	5 V output of the on-board regulator (jumper on, supply up to 12 V)
OUT1	Not wired to the board	not connected	Motor A
OUT2	Not wired to the board	not connected	Motor A
OUT3	Not wired to the board	not connected	Motor B
OUT4	Not wired to the board	not connected	Motor B

Check before you power it on

Motors, servos, relays and LED strips can draw more current than the WeAct Black Pill STM32F411CE’s pins or USB can give. Power them separately and connect the grounds together.

Test code (Arduino)

// Motor A: ENA = speed (PWM), IN1/IN2 = direction. Remove the ENA jumper on the module.
void setup() {
  pinMode(PB13, OUTPUT);
  pinMode(PB14, OUTPUT);
  pinMode(PB12, OUTPUT);
}

void loop() {
  digitalWrite(PB13, HIGH);
  digitalWrite(PB14, LOW);
  analogWrite(PB12, 180);  // about 70% speed
  delay(2000);
  analogWrite(PB12, 0);    // stop
  delay(1000);
}

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 L298N?

ENA → B12 (PB12), IN1 → B13 (PB13), IN2 → B14 (PB14), IN3 → B15 (PB15), IN4 → A8 (PA8), ENB → B10 (PB10), GND → G.

Does the L298N work with the WeAct Black Pill STM32F411CE at 3.3 V?

Yes: the L298N runs at 5 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 · L298N dual motor driver: all pins and data

The L298N on other boards

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