The RF wireless message display can be used to display the time on the NTP synchronized RTC clock (my projects during Aug 2013), so no additional time adjustment at display side is needed.
Parts Used
1. Arduino Uno R3
2. cheaphousetek LCD Keypad Shield
3. RF Receiver (described in Arduino Cookbook 14.1)
Connection
1. Stack LCD Key Keypad Upon Arduino Uno R3
2. RF Receiver Data Pin - Arduino Uno D11
3. RF Receiver Vcc - Arduino Uno 5V
4. RF Receiver Gnd - Arduino Uno Gnd
Photo
The sketch runs correctly with output to LCD shield for 247,610 times.
Sketch
/*
SimpleReceiveLCD
This sketch displays text strings received using VirtualWire
Connect the Receiver data pin to Arduino pin 11
*/
#include <VirtualWire.h>
// include the library code:
#include <LiquidCrystal.h>
byte message[VW_MAX_MESSAGE_LEN]; // a buffer to store the incoming messages
byte messageLength = VW_MAX_MESSAGE_LEN; // the size of the message
unsigned long counter = 1;
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
void setup()
{
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("hello, world!");
lcd.clear();
Serial.begin(9600);
Serial.println("Device is ready");
// Initialize the IO and ISR
vw_setup(2000); // Bits per sec
vw_rx_start(); // Start the receiver
}
void loop()
{
if (vw_get_message(message, &messageLength)) // Non-blocking
{
lcd.clear();
Serial.print(counter);
Serial.print(": ");
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 0);
lcd.print(counter);
lcd.print(":");
lcd.setCursor(0,1);
for (int i = 0; i < messageLength; i++)
{
Serial.write(message[i]);
lcd.print(char(message[i]));
}
Serial.println();
counter++;
}
}
