/*LI-FI Transmitter Code V 2.0 Written By HOUALEF AHMED RAMZI Started on 29-9-2020 Last Update on 14-10-2020 */ #define LaserPin 2 #include <LiquidCrystal.h> const int rs = 12, en = 11, d4 = 6, d5 = 5, d6 = 4, d7 = 3; LiquidCrystal lcd(rs, en, d4, d5, d6, d7); int incomingchar; int KeyPad_R[] = {A2, A1, 9, 7}; //The KeyPad rows int KeyPad_C[] = {8, 10, A3}; // The KeyPad Columns int KeyReturn = 0; // The Output of the Keypad Function from 1-12 int ABC; //variable used to code 3 chars using one button int Row; //variable used in the Keypad function int Column;//variable used in the Keypad function int StCursor = 0; //variable for the Cursor Control int NdCursor = 0; //variable for the Cursor Control int outcomingmatrix[32][5]; //The DATA Buffer int m = 0;// variable used to know the length of the outcomingmatrix to avoid sending all the 32*5 emty buffer int A[] = {1, 1, 1, 1, 0}, B[] = {0, 0, 0, 1, 0}, C[] = {0, 0, 0, 1, 1}, D[] = {0, 0, 1, 0, 0}, E[] = {0, 0, 1, 0, 1}, F[] = {0, 0, 1, 1, 0}, G[] = {0, 0, 1, 1, 1}, H[] = {0, 1, 0, 0, 0}; int I[] = {0, 1, 0, 0, 1}, J[] = {0, 1, 0, 1, 0}, K[] = {0, 1, 0, 1, 1}, L[] = {0, 1, 1, 0, 0}, M[] = {0, 1, 1, 0, 1}, N[] = {0, 1, 1, 1, 0}, O[] = {0, 1, 1, 1, 1}, P[] = {1, 0, 0, 0, 0}; int Q[] = {1, 0, 0, 0, 1}, R[] = {1, 0, 0, 1, 0}, S[] = {1, 0, 0, 1, 1}, T[] = {1, 0, 1, 0, 0}, U[] = {1, 0, 1, 0, 1}, V[] = {1, 0, 1, 1, 0}, W[] = {1, 0, 1, 1, 1}, X[] = {1, 1, 0, 0, 0}; int Y[] = {1, 1, 0, 0, 1}, Z[] = {1, 1, 0, 1, 0}, SPACE[] = {1, 1, 1, 1, 1}; // a small data base to stor all coded charachters void setup() { lcd.begin(16, 2); pinMode(LaserPin, OUTPUT); Serial.begin(9600); for (int i; i < 4; i++) { pinMode( KeyPad_R[i], OUTPUT); } for (int j; j < 3; j++) { pinMode( KeyPad_C[j], INPUT); } lcd.print("HOUALEF RAMZI"); delay(5000); lcd.clear(); lcd.setCursor(0,0); } void conv(int alpha [5], char Char ) { // TO FILL THE OUTPUT BUFFER FROM THE DATA BASE for (int i = 0; i < 5; i++) { outcomingmatrix[m][i] = alpha[i]; } lcd.print(Char); } void start_bit() { //THE START BIT digitalWrite(LaserPin, HIGH); delay(9); digitalWrite(LaserPin, LOW); } void KeyPad() { // OUTPUTS THE BUTTON'S NUMBER PRESSED FROM 1 TO 12 for (int i = 0; i < 4; i++) { digitalWrite( KeyPad_R[i], HIGH); for (int j = 0; j < 3; j++) { if (digitalRead(KeyPad_C[j]) == 1) { Row = i; Column = j; digitalWrite( KeyPad_R[i], LOW); if (Row == 0) { switch (Column) { case 0: KeyReturn = 1; break; case 1: KeyReturn = 2; break; case 2: KeyReturn = 3; break; } } if (Row == 1) { switch (Column) { case 0: KeyReturn = 4; break; case 1: KeyReturn = 5; break; case 2: KeyReturn = 6; break; } } if (Row == 2) { switch (Column) { case 0: KeyReturn = 7; break; case 1: KeyReturn = 8; break; case 2: KeyReturn = 9; break; } } if (Row == 3) { switch (Column) { case 0: KeyReturn = 10; break; case 1: KeyReturn = 11; break; case 2: KeyReturn = 12; break; } } } } } Serial.println(KeyReturn); } void KeyToAscii(int KeyN, int FirtAsciiValue) { // TO CONVERT DATA FROM THE KEYPAD TO THE ASCII VALUE TO WORK WITH THE CONV FUNCTION ABOVE THAT'S HOW WE CAN USE BOTH OF SERIAL MONITOR AND THE KEYPAD if (KeyReturn == KeyN) { incomingchar = FirtAsciiValue + ABC; ABC++; if (ABC == 3) { ABC = 0; } } } void CursorControler() { lcd.setCursor(StCursor, NdCursor); if (KeyReturn == 10) { //TO CONFIRM THE CHARACTERS BECAUSE 11 IN THE CONFIRM BUTTON delay(100); StCursor++; m++; } if (StCursor == 16) { // TO WRITE IN NEW LINE WHEN THE FIRST IS FULL StCursor = 0; NdCursor = 1; } } void loop() { KeyPad(); delay(150); CursorControler(); KeyToAscii(1, 65); KeyToAscii(2, 68); KeyToAscii(3, 71); KeyToAscii(4, 74); KeyToAscii(5, 77); KeyToAscii(6, 80); KeyToAscii(7, 83); KeyToAscii(8, 86); KeyToAscii(9, 89); KeyToAscii(11, 32); switch (incomingchar) { case 65: conv(A, 'A'); break; case 66: conv(B, 'B'); break; case 67: conv(C, 'C'); break; case 68: conv(D, 'D'); break; case 69: conv(E, 'E'); break; case 70: conv(F, 'F'); break; case 71: conv(G, 'G'); break; case 72: conv(H, 'H'); break; case 73: conv(I, 'I'); break; case 74: conv(J, 'J'); break; case 75: conv(K, 'K'); break; case 76: conv(L, 'L'); break; case 77: conv(M, 'M'); break; case 78: conv(N, 'N'); break; case 79: conv(O, 'O'); break; case 80: conv(P, 'P'); break; case 81: conv(Q, 'Q'); break; case 82: conv(R, 'R'); break; case 83: conv(S, 'S'); break; case 84: conv(T, 'T'); break; case 85: conv(U, 'U'); break; case 86: conv(V, 'V'); break; case 87: conv(W, 'W'); break; case 88: conv(X, 'X'); break; case 89: conv(Y, 'Y'); break; case 90: conv(Z, 'Z'); break; case 32: conv(SPACE, ' '); break; case 33: conv(SPACE, ' '); break; } //TO USE THE SPACE FROM THE SERIAL MONITOR YOU HAVE TO CHANGE CASE 91 TO CASE 32 if (KeyReturn == 12) { //TO SEND DATA BECAUSE 12 IS THE SEND BUTTON delay(100); for (int j = 0; j < m; j++) { start_bit(); for (int i = 0; i < 5; i++) { digitalWrite(LaserPin, outcomingmatrix[j][i]); delay(10); } digitalWrite(LaserPin, LOW); delay(20); } for (int k = 0; k < 32; k++) { for (int l = 0; l < 5; l++) { outcomingmatrix[k][l] = 0; // To Clear The buffer } } } incomingchar = 0; // To Avoid continuous DATA storing KeyReturn = 0; // That means no button is pressed currently }
LI-FI Receiver Code V 2.0 C/C++
/*LI-FI Receiver Code V 2.0 Written By HOUALEF AHMED RAMZI Started on 29-9-2020 Last Update on 14-10-2020 */ #include <LiquidCrystal.h> #define SolarCell A0 //To define the input pin of the solarcell int StCursor = 0; // To control the lcd Cursor int A[] = {1, 1, 1, 1, 0}, B[] = {0, 0, 0, 1, 0}, C[] = {0, 0, 0, 1, 1}, D[] = {0, 0, 1, 0, 0}, E[] = {0, 0, 1, 0, 1}, F[] = {0, 0, 1, 1, 0}, G[] = {0, 0, 1, 1, 1}, H[] = {0, 1, 0, 0, 0}; int I[] = {0, 1, 0, 0, 1}, J[] = {0, 1, 0, 1, 0}, K[] = {0, 1, 0, 1, 1}, L[] = {0, 1, 1, 0, 0}, M[] = {0, 1, 1, 0, 1}, N[] = {0, 1, 1, 1, 0}, O[] = {0, 1, 1, 1, 1}, P[] = {1, 0, 0, 0, 0}; int Q[] = {1, 0, 0, 0, 1}, R[] = {1, 0, 0, 1, 0}, S[] = {1, 0, 0, 1, 1}, T[] = {1, 0, 1, 0, 0}, U[] = {1, 0, 1, 0, 1}, V[] = {1, 0, 1, 1, 0}, W[] = {1, 0, 1, 1, 1}, X[] = {1, 1, 0, 0, 0}; int Y[] = {1, 1, 0, 0, 1}, Z[] = {1, 1, 0, 1, 0}, SPACE[] = {1, 1, 1, 1, 1}; const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2; int Cell_Input; // The input of the Solar-Cell int Threshold; int info[5]; //The received DATA LiquidCrystal lcd(rs, en, d4, d5, d6, d7); void setup() { pinMode(A0, INPUT); Serial.begin(9600); lcd.begin(16, 2); lcd.setCursor(0, 0); Threshold = analogRead(SolarCell) + 10; lcd.print("READY TO RECEIVE"); delay(5000); lcd.clear(); } void BufferClear() { // The clear the buffer for (int i = 0; i < 5; i++) { info[i] = 0; } } void check_condition(int received_bits[5], int Binaryalpha[5], char Lcdalpha) {//To compare the received bits With the data base if (received_bits[0] == Binaryalpha[0] && received_bits[1] == Binaryalpha[1] && received_bits[2] == Binaryalpha[2] && received_bits[3] == Binaryalpha[3] && received_bits[4] == Binaryalpha[4]) { lcd.print(Lcdalpha); CursorControler(); } } void CursorControler() { // To control the cursor StCursor++; if (StCursor == 16) lcd.setCursor(0, 1); } void loop() { Cell_Input = analogRead(SolarCell); if (Cell_Input > Threshold) { // the start bit detection delay(10); // timing for (int i = 0; i < 5; i++) { // save data if (analogRead(SolarCell) > Threshold) { info[i] = 1; } else { info[i] = 0; } delay(10); } check_condition(info, A, 'A'); check_condition(info, B, 'B'); check_condition(info, C, 'C'); check_condition(info, D, 'D'); check_condition(info, E, 'E'); check_condition(info, F, 'F'); check_condition(info, G, 'G'); check_condition(info, H, 'H'); check_condition(info, I, 'I'); check_condition(info, J, 'J'); check_condition(info, K, 'K'); check_condition(info, L, 'L'); check_condition(info, M, 'M'); check_condition(info, N, 'N'); check_condition(info, O, 'O'); check_condition(info, P, 'P'); check_condition(info, Q, 'Q'); check_condition(info, R, 'R'); check_condition(info, S, 'S'); check_condition(info, T, 'T'); check_condition(info, U, 'U'); check_condition(info, V, 'V'); check_condition(info, W, 'W'); check_condition(info, X, 'X'); check_condition(info, Y, 'Y'); check_condition(info, Z, 'Z'); check_condition(info, SPACE, ' '); BufferClear(); } }
