Amogh Sawant
Published

Morse Code Lamp

A Morse code lamp is a visual signaling device for optical communication, using Morse code.

IntermediateFull instructions provided1 hour1,281
Morse Code Lamp

Things used in this project

Hardware components

Bolt WiFi Module
Bolt IoT Bolt WiFi Module
×1
LED (generic)
LED (generic)
×1
Resistor 330 ohm
Resistor 330 ohm
×1

Software apps and online services

Bolt Cloud
Bolt IoT Bolt Cloud

Story

Read more

Schematics

Bolt IoT LED connection

connect the LED as shown in the diagram.
Insert the negative leg of the LED into the ground (GND) pin of the Bolt.
Insert the positive leg of the LED into the 0 pin of the Bolt.
It is fine if you don't want to connect the resistor as shown in story but I recommend it to prevent shorting the LED.

Code

Morse Code

Python
comments have been added in the code section to explain every function.
from boltiot import Bolt
import time

api_key = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx"    # your bolt api key
device_id  = "xxxxxxxxxx"  #your bolt device id
mybolt = Bolt(api_key, device_id)

# morse code dictionary; source: https://en.wikipedia.org/wiki/Morse_code 
morse_code_dict = {"A":"._", "B":"_...", "C": "_._.", "D": "_..", "E": ".", "F": ".._.",
                   "G": "__.", "H": "....", "I": "..", "J": ".___", "K": "_._", "L": "._..",
                   "M": "__", "N": "_.", "O": "___", "P": ".__.", "Q": "__._", "R": "._.",
                   "S": "...", "T": "_", "U": ".._", "V": "..._", "W": ".__", "X": "_.._",
                   "Y": "_..__", "Z": "__..", "1": ".____", "2": "..___", "3": "...__", "4": "...._",
                   "5": ".....", "6": "_....", "7": "__...", "8": "___..", "9": "____.", "0": "_____", " ": ""}

def list_to_string(s):  # helper function to convert list to string
    string = ""

    for letter in s:
        string += letter

    return string

def filtered_string(string):    # this function filter unnecessary symbols from the important message
    ignore = "~`!@#$%^&*()_+{}|[]\:'<>?,./';-="
    # converting to list because strings are immutable
    string = list(string)   
    ignore = list(ignore)

    for i in range(len(string)):
        for j in range(len(ignore)):
            if string[i] == ignore[j]:
                string[i] = ""

    string = (list_to_string(string)).upper()

    return string

def morse_code_converter(string):   # function to convert main message to morse code
    string = filtered_string(string)
    morse_code = ""

    print("Filtered string: ", string)

    for i in string:
        morse_code = morse_code + morse_code_dict[i] + " "

    return morse_code

def led_blink(code):    # function to blink the led on bolt according to dits and dahs in morse code

# time gaps are according to the source: http://www.morsecodeclassnet.com/lesson3/
    for i in code:
        if i == ".":    # dit
            mybolt.digitalWrite('0', 'HIGH')
            time.sleep(0.1)
            mybolt.digitalWrite('0', 'LOW')

        elif i == "_":  #dah
            mybolt.digitalWrite('0', 'HIGH')
            time.sleep(0.3)
            mybolt.digitalWrite('0', 'LOW')

        elif i == " ":  # space between letters and words
            time.sleep(0.3)


string = input("Enter the string (type '-exit' to quit): ")

while string != "-exit":
    morse_code = morse_code_converter(string)
    print(morse_code)
    led_blink(morse_code)

    string = input("Enter the string (type '-exit' to quit): ")
    
# you can check the output of the code by verifing through this website: https://morsecode.world/international/translator.html

Credits

Amogh Sawant

Amogh Sawant

1 project • 0 followers

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