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Built-in project · Waveshare RP2040-Zero

RP2040-Zero blink

An LED on GP0 of the RP2040-Zero, which has no plain LED of its own, with the board beside the breadboard. The whole build, a Waveshare RP2040-Zero and 2 more parts, 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 $9.15. On Mokxi they're free.

RP2040-Zero blink · Waveshare RP2040-Zerolive0.000 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 · Waveshare RP2040-Zero
// Blink: an LED and a 220 ohm resistor from GP0 to GND. The board has no
// plain LED of its own.

const int kLed = 0;

void setup() {
  pinMode(kLed, OUTPUT);
}

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

Parts list

4 parts, plus the jumper wires. They retail for about $9.15; 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.

  • Ground: Waveshare RP2040-Zero pin GND; LED, yellow pin C
  • Waveshare RP2040-Zero pin GP0; Resistor, 220 Ω pin 1
  • Resistor, 220 Ω pin 2; LED, yellow pin A

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