Embedded Systems UEF - Spring 2026

This repository contains the code for the Embedded Systems course at UEF

Exercise 1 - Introduction

• Arduino Nano Every full pinout
• Follow the PWM DC Motor Guide, but use a lower resistance resistor for the fan (or it won't spin).

Steps

Setup Arduino IDE for Nano Sense Every

1. Install the Arduino IDE:
   • Arch Linux
   • Windows, macOS, and Ubuntu
2. Plug the board into your computer with the provided USB Micro B cable
3. Configure the IDE for Nano Every

Troubleshooting

• ”avrdude: jtagmkII_initialize(): Cannot locate "flash" and "boot" memories in description"
• Arduino Debugging Basics

Exercise 2 - Accelerometer & Screen

Configure the accelerometer & OLED Screen

Steps

1. Install Adafruit SSD1306 by Adafruit in the Arduino IDE and optionally U8g2 by oliver for a second OLED driver library option (it handles fonts better). Also install the STM32duino LIS2DW12 by SRA library for the accelerometer.
2. Wire the OLED and accelerometer to the SCL and SDA ports of the board. DO NOT use external pullup resistors with the OLED display. It won't work. Wire the 3.3V power output to the VCC line. DO NOT wire 5V to the accelerometer or it will kill the sensor.

For Reference

• Installing libraries in Arduino
• DFRobot Monochrome OLED Display
• DFRobot LIS2DW12 Triple Axis Accelerometer
• DIY Simple Three-axis Accelerometer Data Logger
• I2C Protocol

Exercise 3 - Gyroscope

Add the gyroscope sensor

Steps

1. Install Adafruit MPU6050 by Adafruit and MPU6050 by Electronic Cats in the Arduino IDE.
2. Wire the OLED, accelerometer, and gyroscope to the SCL and SDA ports of the board. Follow the same precautions as before and ensure you use 3.3V power.

Troubleshooting

For Reference

• DFRobot 6DOF MPU6050 Gyroscope
• DFRobot 6DOF MPU6050 Data Sheet
• Complimentary Filters

Exercise 4 - Magnetometer

For Reference

• DFRobot BMM150 Triple Axis Magnetometer
• Arduino Nano Every MCU Data Sheet

Oscilloscope Tutorial

See the oscilloscope_tutorial folder for code samples to run. The tutorial is adapted from Six Oscilloscope Measurements with Arduino and more detailed information can be found there.

To complete the challenge follow these steps:

1. Check Auto-RESET on Arduino Nano Every. Locate the correct resistor via the datasheet and PCB diagram and probe it.
2. Check the TX/RX decode behavior. Run both the 2_uart_... scripts. What is the difference between them?
3. Measured the 3.3V DC Voltage rail. Also measure the 5V voltage rail
4. See probe loading in action. Test a ceramic capacitor on the board and notice a difference!
5. PWM Duty Cycle testing with sound!
6. digitalWrite and port manipulation
7. Tone generation with register programming

This tutorial also uses concepts from the following:

• Arduino Nano Every Register Deep Dive
• Arduino Nano Every Timers and PWM
• Arduino Nano Every ATMega4808/4809 Data Sheet
• Songs with the buzzer