Example project · Start here

Uno R4 · Blink

The onboard D13 LED lights for half a second and turns off for half a second. Edit the two delays in Code, or probe D13 in Scope to measure the period.

Open this project in the simulator →All example projects

What's on the bench

Arduino Uno R4
Battery

How it's wired

Battery · pos→Arduino Uno R4 · 5v
Battery · neg→Arduino Uno R4 · gnd

The code

This Arduino C++ sketch lives in the Code tab; sign in and press Compile & upload to build real firmware for the emulated board.

// SPDX-License-Identifier: MIT
// UNO R4 WiFi: blink the physical D13 onboard LED once per second.
void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
}

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

Firmware licence

Notice: this firmware uses the LGPL-licensed Arduino core library

arduino-unor4wifi-blink-gallery.bin is statically linked with ArduinoCore-renesas 1.6.0, in Breadboard's port of its UNO R4 WiFi variant to Renesas FSP 5.3.0. Parts of that core are licensed under the GNU Lesser General Public License, version 2.1 or (at your option) any later version ("the Library"). Breadboard distributes this firmware under terms that permit you to modify the work for your own use and to reverse engineer it for debugging such modifications.

Relink package: arduino-unor4wifi-blink-gallery-relink.zip (345 KB)
Corresponding source: ArduinoCore-renesas-1.6.0-fsp53-source.zip (3.7 MB)
Licence texts and relink instructions

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