Hi everyone,
I'm currently doing a project, where I using the following components:
- Matrix Keypad(4x4) x 2
- LCD panel (16,2) x 1
- Arduino Uno x 2
- Base shield x 2
- Potentiometer 10k x 1
- Grove buzzer v1.1b x 1
- Grove transmitter 315MHz x 1
- Grove receiver 315MHz x 1
My project is two devices.
Device A: Matrix Keypad (4x4), LCD panel (16,2), Arduino Uno, Base Shield, Potentiometer, Grove transmitter 315MHz
Device B: Matrix Keypad (4x4), Arduino Uno, Base Shield, Grove receiver 315MHz
Basically, I want my Device A to transmit the input from Keypad (e.g. 1234). And when Device B to receive the same input from Keypad (e.g. 1234). Once the Device B matched with Device A, the output for the Device B (Buzzer) will sound.
The problem I'm facing now is my wireless communication are unable to communicate with each another. And I couldn't solve the problems. I hope you can help me to solve my problem.
Here is my coding that I had done:
Device A
#include <Keypad.h>
#include <LiquidCrystal.h>
#include <Wire.h>
#include <VirtualWire.h>
const byte Rows= 4;
const byte Cols= 4;
LiquidCrystal lcd (8, 9, 10, 11, 12, 13);
char keymap[Rows][Cols]=
{
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};
char busnumber[4];
byte rowPins[Rows]= {7, 6, 5, 4};
byte rowCols[Cols]= {18, 17, 16, 15};
int i = 0;
boolean repeat = 0;
int RF_TX_PIN = 1;
Keypad myKeypad= Keypad(makeKeymap(keymap), rowPins, rowCols, Rows, Cols);
void setup()
{
//Serial.begin(9600);
lcd.begin(16,2);
lcd.setCursor(4,0);
lcd.print("Welcome");
lcd.setCursor(2,1);
lcd.print("Bus Captain");
delay(500);
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Drive Safely");
lcd.setCursor(0,1);
lcd.print("Have a nice day!");
delay(500);
lcd.clear();
lcd.setCursor(1,0);
lcd.print("Enter your bus");
lcd.setCursor(14,1);
lcd.print("]");
lcd.setCursor(1,1);
lcd.print("service [");
vw_set_tx_pin(1);
vw_setup(2000);
}
void loop()
{
int j = 0;
char key= myKeypad.getKey();
{
if (key != 0)
{
//Serial.print(key);
switch(key)
{
case 'A':
break;
case 'B':
i--;
lcd.setCursor(10 + i,1);
lcd.print(" ");
lcd.setCursor(10 + i,1);
break;
case 'C':
lcd.clear();
lcd.setCursor(1,0);
lcd.print("Enter your bus");
lcd.setCursor(14,1);
lcd.print("]");
lcd.setCursor(1,1);
lcd.print("service [");
while (j<4)
{
busnumber[j] = 0;
lcd.print(busnumber[j]);
j++;
}
lcd.setCursor(10,1);
i = 0;
break;
case 'D':
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Transmitting bus");
lcd.setCursor(4,1);
lcd.print("[");
lcd.setCursor(11,1);
lcd.print("]");
lcd.setCursor(5,1);
lcd.print(busnumber);
while (!repeat < 100)
{
vw_send((uint8_t *)busnumber, 1);
delay(500);
repeat++;
}
break;
case '*':
break;
case '#':
break;
default:
if (i > 3)
{
i = 0;
lcd.setCursor(10,1);
}
busnumber[i] = key;
lcd.print(busnumber[i]);
i++;
break;
}
}
}
vw_send((uint8_t *)busnumber, 1);
delay(150);
}
Device B
#include <Keypad.h>
#include <VirtualWire.h>
const byte Rows = 4;
const byte Cols = 4;
char keymap[Rows][Cols]=
{
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};
char busnumber[4];
byte rowPins[Rows]= {4,5,6,7};
byte rowCols[Cols]= {8,9,10,11};
int i = 0;
boolean repeat = 0;
int RF_RX_PIN = 0;
Keypad myKeypad= Keypad(makeKeymap(keymap), rowPins, rowCols, Rows, Cols);
void setup()
{
Serial.begin(9600);
pinMode(4, OUTPUT);
Serial.println("SETUP IN PROGRESS...");
delay(1000);
Serial.println("SETUP COMPLETE!");
Serial.println("ENTER YOUR BUS NUMBER");
vw_set_rx_pin(0);
vw_setup(2000);
vw_rx_start();
}
void loop()
{
int j = 0;
char key= myKeypad.getKey();
if (key != 0)
{
switch (key)
{
case 'A':
Serial.println("-");
break;
case 'B':
Serial.println("-");
break;
case 'C':
while (j < 4)
{
busnumber[j] = 0;
Serial.print(busnumber[j]);
Serial.println("CLEAR");
j++;
}
i = 0;
break;
case 'D':
while (!repeat < 5)
{
Serial.println("RECEIVING...");
delay(3000);
uint8_t buf[VW_MAX_MESSAGE_LEN];
uint8_t buflen = VW_MAX_MESSAGE_LEN;
if(vw_get_message(buf, &buflen))
{
digitalWrite(4, HIGH);
delay(1000);
digitalWrite(4, LOW);
delay(1000);
digitalWrite(4, HIGH);
delay(1000);
digitalWrite(4, LOW);
delay(1000);
digitalWrite(4, HIGH);
delay(1000);
digitalWrite(4,LOW);
Serial.println("BUS IS ARRIVING");
}
else
{
digitalWrite(4, LOW);
}
int i;
for (i = 0; i < buflen; i++);
repeat++;
}
break;
case '*':
Serial.println("-");
break;
case '#':
Serial.println("-");
break;
default:
if (i > 3)
{
Serial.println("/");
i = 0;
}
busnumber[i] = key;
Serial.print(busnumber[i]);
i++;
break;
}
}
uint8_t buf[VW_MAX_MESSAGE_LEN];
uint8_t buflen = VW_MAX_MESSAGE_LEN;
if(vw_get_message(buf, &buflen))
{
digitalWrite(4, HIGH);
delay(1000);
digitalWrite(4, LOW);
delay(1000);
digitalWrite(4, HIGH);
delay(1000);
digitalWrite(4, LOW);
delay(1000);
digitalWrite(4, HIGH);
delay(1000);
digitalWrite(4, LOW);
Serial.print("BUS IS ARRIVING");
}
else
{
digitalWrite(4, LOW);
}
int i;
for (i = 0; i < buflen; i++);
}
