Joystick module with NUCLEO-F401RE

Wiring for the Analog joystick (KY-023) on the NUCLEO-F401RE (STM32F401RE, 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

Joystick module pin	Role	NUCLEO-F401RE pin	Notes
GND	Ground	GND
+5V	Power	3V3	Connect to 3V3 anyway, so the outputs stay within the ADC range
VRX	Analog output	A0 (PA0)
VRY	Analog output	A1 (PA1)
SW	Output from the part	D2 (PA10)	Button: LOW when pressed. Use INPUT_PULLUP

Check before you power it on

Supply: 3.3 V from the 3V3 pin.

Test code (Arduino)

void setup() {
  Serial.begin(115200);
  analogReadResolution(12);
}

void loop() {
  long mv = (long)analogRead(PA0) * 3300L / 4095;  // VRX on A0
  Serial.println(mv);
  delay(200);
}

Arduino board: STMicroelectronics:stm32:Nucleo_64:pnum=NUCLEO_F401RE. Plug the USB cable into the mini-USB port on the ST-LINK end. No button press is needed.

Questions

Which NUCLEO-F401RE pins do I use for the Joystick module?

GND → GND, +5V → 3V3, VRX → A0 (PA0), VRY → A1 (PA1), SW → D2 (PA10).

Does the Joystick module work with the NUCLEO-F401RE at 3.3 V?

Yes: the Joystick module runs at 3.3 V and the NUCLEO-F401RE 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 NUCLEO-F401RE pinout · Analog joystick (KY-023): all pins and data

The Joystick module on other boards

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