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Built-in project · STM32 Nucleo-F411RE

Nucleo analog read

A potentiometer on A0 of an STM32 Nucleo-F411RE, read in ten bits and printed with its voltage. The whole build, an STM32 Nucleo-F411RE and 1 more part, runs here in your browser on the firmware below; open it in the editor to change the wiring or the code and run it again.

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The parts retail for about $16.50. On Mokxi they're free.

Nucleo analog read · STM32 Nucleo-F411RElive0.000 s 0.00x
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The circuit itself, running here on the simulator. Press what can be pressed; click anything else to open it in the editor.

The code

The firmware exactly as the editor opens it. Change a line there and press Run: it compiles in the browser.

sketch.ino · STM32 Nucleo-F411RE
// Analog read: a potentiometer on A0.
//
// Wire the pot's ends to 3V3 and GND and its wiper to A0 (the STM32's PA0).
// analogRead gives ten bits by default, 0 to 1023 over 0 to 3.3 V, as
// STM32duino does; call analogReadResolution(12) for the ADC's full twelve.

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

void loop() {
  int raw = analogRead(A0);
  float volts = raw * 3.3 / 1023.0;
  Serial.print("A0 = ");
  Serial.print(raw);
  Serial.print("  (");
  Serial.print(volts, 2);
  Serial.println(" V)");
  delay(500);
}

Parts list

3 parts, plus the jumper wires. They retail for about $16.50; on Mokxi they're free.

How it is wired

3 connections, pin by pin, read from the circuit itself. Each line is one set of pins joined together, by a jumper wire or a breadboard strip.

  • STM32 Nucleo-F411RE pin 3V3; Potentiometer pin 3
  • Ground: STM32 Nucleo-F411RE pin GND; Potentiometer pin 1
  • STM32 Nucleo-F411RE pin A0; Potentiometer pin 2

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