Wireless Arduino Using 315Mhz RF Transmitter and Receiver Module Leave a comment

325Mhz – 433Mhz RF Transmitter + Receiver Module Link Kit will allow us to connect two Arduinos and that can communicate. Data you send on computer Transmitter show on Arduino Receiver screen.

Step 1:

You will need for this project:

• Arduino Uno
• Arduino Pro MINI.
• 16×2 LCD Display.
• 433Mhz or 315Mhz RF Transmitter + Receiver Module Link
• Prototype BreadBoard
• Cables
• 10k potentiometer

Step 2:

How to upload sketches on Arduino Pro MINI.

    1. Remove Atmega328 from Arduino UNO
    2. Using male-to-female cables connect Pro MINI to UNO RX-RX; TX-TX;       3. RST-RST; GND-GND; VCC-+5V
    4. Change in Tools-Board-Arduino Pro or Pro MINI
    5. Upload sketch

Step 3: Receiver scheme

Connect the circuit according to the schemes below, and upload the code which you can find at the code Section (Receiver Part). 

Step 4: Transmitter scheme

Connect the circuit according to the schemes below, and upload the code which you can find at the code Section (Transmitter part).

Finally: 

Print any message to the Serial Monitor window. End with point “.” and press ENTER. 

#include <VirtualWire.h>
char cad[100];
int i=0;
void setup()
{
Serial.begin(9600);
vw_setup(2000);
Serial.print(“End with \”.\” each data”);
}
void loop()
{
if( Serial.available() > 0)
{
cad[i] = Serial.read();
i++;
}
if( cad[i-1] == ‘.’)
{
cad[i] = ‘\0’;
i=0;
vw_send((byte *)cad, strlen(cad));
delay(400);
}
}

#include <VirtualWire.h>
#include <LiquidCrystal.h>
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
char cad[100];
int pos = 0;
void setup()
{
lcd.begin(16, 2);
lcd.setCursor(1, 0);
vw_setup(2000);
vw_rx_start();
}
void loop()
{
byte buf[VW_MAX_MESSAGE_LEN];
byte buflen = VW_MAX_MESSAGE_LEN;
int i;
if( vw_get_message(buf, &buflen) )
{
if(pos < 2)
lcd.setCursor(0, pos);
else
{
pos=0;
lcd.clear();
}
for (i = 1; i < buflen; i++)
{
lcd.print((char)buf[i]);
pos++;

}
}
}