/* Morse code - Transmitter modified on 14 Apr 2019 by Saeed Hosseini @ Electropeak https://electropeak.com/learn */ const int led = 13; const int buz = 8; String code = ""; int len = 0; char ch; char new_char; int unit_delay = 250; void dot() { Serial.print("."); digitalWrite(led, HIGH); digitalWrite(buz, HIGH); delay(unit_delay); digitalWrite(led, LOW); digitalWrite(buz, LOW); delay(unit_delay); } void dash() { Serial.print("-"); digitalWrite(led, HIGH); digitalWrite(buz, HIGH); delay(unit_delay * 3); digitalWrite(led, LOW); digitalWrite(buz, LOW); delay(unit_delay); } void A() { dot(); delay(unit_delay); dash(); delay(unit_delay); } void B() { dash(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); } void C() { dash(); delay(unit_delay); dot(); delay(unit_delay); dash(); delay(unit_delay); dot(); delay(unit_delay); } void D() { dash(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); } void E() { dot(); delay(unit_delay); } void f() { dot(); delay(unit_delay); dot(); delay(unit_delay); dash(); delay(unit_delay); dot(); delay(unit_delay); } void G() { dash(); delay(unit_delay); dash(); delay(unit_delay); dot(); delay(unit_delay); } void H() { dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); } void I() { dot(); delay(unit_delay); dot(); delay(unit_delay); } void J() { dot(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); } void K() { dash(); delay(unit_delay); dot(); delay(unit_delay); dash(); delay(unit_delay); } void L() { dot(); delay(unit_delay); dash(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); } void M() { dash(); delay(unit_delay); dash(); delay(unit_delay); } void N() { dash(); delay(unit_delay); dot(); delay(unit_delay); } void O() { dash(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); } void P() { dot(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); dot(); } void Q() { dash(); delay(unit_delay); dash(); delay(unit_delay); dot(); delay(unit_delay); dash(); delay(unit_delay); } void R() { dot(); delay(unit_delay); dash(); delay(unit_delay); dot(); delay(unit_delay); } void S() { dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); } void T() { dash(); delay(unit_delay); } void U() { dot(); delay(unit_delay); dot(); delay(unit_delay); dash(); delay(unit_delay); } void V() { dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dash(); delay(unit_delay); } void W() { dot(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); } void X() { dash(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dash(); delay(unit_delay); } void Y() { dash(); delay(unit_delay); dot(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); } void Z() { dash(); delay(unit_delay); dash(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); } void one() { dot(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); } void two() { dot(); delay(unit_delay); dot(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); } void three() { dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); } void four() { dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dash(); delay(unit_delay); } void five() { dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); } void six() { dash(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); } void seven() { dash(); delay(unit_delay); dash(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); } void eight() { dash(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); dot(); delay(unit_delay); dot(); delay(unit_delay); } void nine() { dash(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); dot(); delay(unit_delay); } void zero() { dash(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); dash(); delay(unit_delay); } void morse() { if (ch == 'A' || ch == 'a') { A(); Serial.print(" "); } else if (ch == 'B' || ch == 'b') { B(); Serial.print(" "); } else if (ch == 'C' || ch == 'c') { C(); Serial.print(" "); } else if (ch == 'D' || ch == 'd') { D(); Serial.print(" "); } else if (ch == 'E' || ch == 'e') { E(); Serial.print(" "); } else if (ch == 'f' || ch == 'f') { f(); Serial.print(" "); } else if (ch == 'G' || ch == 'g') { G(); Serial.print(" "); } else if (ch == 'H' || ch == 'h') { H(); Serial.print(" "); } else if (ch == 'I' || ch == 'i') { I(); Serial.print(" "); } else if (ch == 'J' || ch == 'j') { J(); Serial.print(" "); } else if (ch == 'K' || ch == 'k') { K(); Serial.print(" "); } else if (ch == 'L' || ch == 'l') { L(); Serial.print(" "); } else if (ch == 'M' || ch == 'm') { M(); Serial.print(" "); } else if (ch == 'N' || ch == 'n') { N(); Serial.print(" "); } else if (ch == 'O' || ch == 'o') { O(); Serial.print(" "); } else if (ch == 'P' || ch == 'p') { P(); Serial.print(" "); } else if (ch == 'Q' || ch == 'q') { Q(); Serial.print(" "); } else if (ch == 'R' || ch == 'r') { R(); Serial.print(" "); } else if (ch == 'S' || ch == 's') { S(); Serial.print(" "); } else if (ch == 'T' || ch == 't') { T(); Serial.print(" "); } else if (ch == 'U' || ch == 'u') { U(); Serial.print(" "); } else if (ch == 'V' || ch == 'v') { V(); Serial.print(" "); } else if (ch == 'W' || ch == 'w') { W(); Serial.print(" "); } else if (ch == 'X' || ch == 'x') { X(); Serial.print(" "); } else if (ch == 'Y' || ch == 'y') { Y(); Serial.print(" "); } else if (ch == 'Z' || ch == 'z') { Z(); Serial.print(" "); } else if (ch == '0') { zero(); Serial.print(" "); } else if (ch == '1') { one(); Serial.print(" "); } else if (ch == '2') { two(); Serial.print(" "); } else if (ch == '3') { three(); Serial.print(" "); } else if (ch == '4') { four(); Serial.print(" "); } else if (ch == '5') { five(); Serial.print(" "); } else if (ch == '6') { six(); Serial.print(" "); } else if (ch == '7') { seven(); Serial.print(" "); } else if (ch == '8') { eight(); Serial.print(" "); } else if (ch == '9') { nine(); Serial.print(" "); } else if(ch == ' ') { delay(unit_delay*7); Serial.print("/ "); } else Serial.println("Unknown symbol!"); } void String2Morse() { len = code.length(); for (int i = 0; i < len; i++) { ch = code.charAt(i); morse(); } } void setup() { Serial.begin(9600); pinMode(led, OUTPUT); pinMode(buz, OUTPUT); Serial.println("I am ready..."); } void loop() { while (Serial.available()) { code = Serial.readString(); Serial.print(code); Serial.print(" = "); String2Morse(); Serial.println(""); } delay(1000); }