Morse2

#link: https://en.wikipedia.org/wiki/Morse_code

Morse (Part 2)

The goal of this 3-part mini series is to build a Morse translator that receives a string message and transmits the message by flashing a LED controlled by an Arduino.

This exercise was loosely inspired by Tutorial #4 of the Arduino Tutorial series by Paul McWhorter https://www.youtube.com/watch?v=nPOKOi1jIK0&list=PLGs0VKk2DiYw-L-RibttcvK-WBZm8WLEP&index=9

On Part 2 the task is to build a simple CLI that will accept a string and then:

• preprocess the string: e.g . strip it of non translatable characters, add appropriate tokens to start, end, etc.
• translate to morse code, including pauses to an intermediate morse string. Use "." for dots, "-" for dashes, separate letters by spaces and words by "/". If a letter cannot be translated, show a "#" in the output.
• Use this Online Morse translator https://morsecode.world/international/translator.html for testing. Note that the Online Morse Translator does not add the Start <CT> and End of Trasnmission <SK> prosigns.
• translate to an appropriate format to transmit to the Arduino considering the durations stipulated by the International Morse Code (cfr. https://morsecode.world/international/morse2.html)

Durations

• dot: one time unit
• dash: three units.
• space between the components of one character: one unit
• space between characters in a word: three units
• space between words: seven units
• prosigns - indicated in the table using angled brackets - are combinations of two letters sent together with no space in between
• other abbreviations and Q codes are sent with the normal spacing

We leave for Part 3 the interface with Arduino, i.e.:

• send the data through serial to Arduino
• operate the LED to transmit the message

Example output:

$ ./morse -s "Hello, world!"
"-.-.- /.... . .-.. .-.. --- --..-- /.-- --- .-. .-.. -.. -.-.-- /...-.- "
"1110101110101110000000101010100010001011101010001011101010001110111011100011101110101011101110000000101110111000111011101110001011101000101110101000111010100011101011101011101110000000101010111010111000"
Sent Message: "<CT> HELLO, WORLD! <SK>"

$ ./morse -s "abcde FGHIJ klmno PQRST uvwxy z0123 45678 9.,?! ():"
"-.-.- /.- -... -.-. -.. . /..-. --. .... .. .--- /-.- .-.. -- -. --- /.--. --.- .-. ... - /..- ...- .-- -..- -.-- /--.. ----- .---- ..--- ...-- /....- ..... -.... --... ---.. /----. .-.-.- --..-- ..--.. -.-.-- /-.--. -.--.- ---... /...-.- "
"11101011101011100000001011100011101010100011101011101000111010100010000000101011101000111011101000101010100010100010111011101110000000111010111000101110101000111011100011101000111011101110000000101110111010001110111010111000101110100010101000111000000010101110001010101110001011101110001110101011100011101011101110000000111011101010001110111011101110111000101110111011101110001010111011101110001010101110111000000010101010111000101010101000111010101010001110111010101000111011101110101000000011101110111011101000101110101110101110001110111010101110111000101011101110101000111010111010111011100000001110101110111010001110101110111010111000111011101110101010000000101010111010111000"
Sent Message: "<CT> ABCDE FGHIJ KLMNO PQRST UVWXY Z0123 45678 9.,?! (): <SK>"

$ ./morse -s "       Hello!       ; "
"-.-.- /.... . .-.. .-.. --- -.-.-- /# /...-.- "
"1110101110101110000000101010100010001011101010001011101010001110111011100011101011101011101110000000000000101010111010111000"
Sent Message: "<CT> HELLO! ; <SK>"

Tags

#tags:

• basics
• algorithms
• data_structures: trees, graphs
• strings: regex
• dates_times: timezones
• file_management: input, output, folders and files
• testing
• exceptions
• logging
• object_oriented_programming
• GUI
• plotting_data
• CLI
• arduino
• ROS
• AI_tools: chat GPT
• databases
• API
• web_scraping
• OpenCV