Adventures in Arduino land

A series of arduino sketches along with some integrations and testing in ruby and arduino.

Activity Validator

Simulate sensor input by using the Serial class. Push fake sensor data with a ruby script to the arduino sketch to test the business logic not just component integrity.

• sketch activity_validator.ino
• test activity_validator_test.rb

Temperature Logging with LM35

A simpler logger for the LM35 analog sensor that includes

• sketch temperature_logger_lm_35.ino
• a factory test sketch temperature_logger_lm_35_factory_test.ino
• a ruby script that compile uploads and runs the test suite temperature_logger_lm_35_factory_test.rb
• a ruby script that will connect and collect the temperature readings in a .csv file collect_data_lm_35.rb
• a ruby script that will summarize the findings analyze_data_lm_35.rb
• GitHub actions that will compile the specified sketches

3 LED fade in and out

Using 3 LEDs and a potentiometer to dim the lights on and off

• sketch dim_3_leds.ino

DigitalReadSerial

Read the button's state

• sketch button.ino

Sending bytes to Serial

• sketch serial_chars.ino
• use arduino-cli monitor -p /dev/ttyACM0 -c baudrate=9600 --raw to open the monitor and type any character
• or screen /dev/ttyACM0 9600

Led blinking

Loop digitalWrite with LOW and HIGH for one second

• sketch led_loop.ino
  VID_20251203_172218641.3.mp4

Turn on led with button

Push the button and the light will go on

• sketch button_led.ino

Running factory tests on GitHub actions

Add a self-hosted runner to run the factory tests on GitHub source

Running locally

Developed on Ubuntu 24.

You will need ruby installed matching the version in .ruby-version and arduino-cli

Then bundle install for the ruby dependencies.

Having arduino ide installed is helpful.