Simple Ethernet Remote
This was a real quick project. I attached a relay shield and 315Mhz remote relay switch to the Seeeduino Ethernet to make a Ethernet remote control for lights and projector.
Future case, a dead ups
–Found two different programs, one very simple, one quite involved. Since this system only does lights (not security) I went with the simple one.
–Even so, there were problems with
•Persistence, the gui did not read the state of the remote.
•Did not support 8 relays (since the boards only have 4)
–Used analog in as digital output
•Crashed after a couple of commands.
–Just allocated more
•Remote transmitter was not stable
–Used extra relay to power remote transmitter on and off
/*
Web Server
A simple web server that shows the value of the analog input pins.
using an Arduino Wiznet Ethernet shield.
Circuit:
* Seeedino Ethernet
created 18 Dec 2009
by David A. Mellis
modified 4 Sep 2010
by Tom Igoe
modified 20 Jan 2013
*/
#include <SPI.h>
#include <Ethernet.h>
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,0,177);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
#define numPins 8
int pins[numPins+1] = { 4, 5, 6, 7,16,17,18,19,9};
int pinState[numPins+2] = {0};
char pinName[numPins][8]={
"Reset",
"Lite 1",
"Lite 2",
"Lite 3",
"R1",
"R2",
"P1",
"Power"
};
char line1[300];
void setup()
{
for (int i = 0; i < numPins+1; i++)
{
pinMode(pins[i], OUTPUT);
}
digitalWrite(pins[numPins],0);
Serial.begin(9600);
Ethernet.begin(mac, ip);
server.begin();
Serial.println("initialization done.");
}
void loop()
{
EthernetClient client = server.available();
if (client)
{
while (client.connected())
{
readHeader(client);
if (! pageNameIs("/"))
{
client.stop();
return;
}
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println();
// send the body
client.println("<html><body>");
client.println("<h1>Output Pins</h1>");
client.println("<form method='GET'>");
setValuesFromParams();
setPinStates();
for (int i = 0; i < numPins; i++)
{
writeHTMLforPin(client, i);
}
client.println("<input type='submit' value='Update'/>");
client.println("</form>");
client.println("</body></html>");
client.stop();
}
}
}
void writeHTMLforPin(EthernetClient client, int i)
{
client.print("<p>");
client.print(pinName[i]);
// client.print(pins[i]);
client.print("<select name='");
client.print(i);
client.println("'>");
client.print("<option value='0'");
if (pinState[i] == 0)
{
client.print(" selected");
}
client.println(">Off</option>");
client.print("<option value='1'");
if (pinState[i] == 1)
{
client.print(" selected");
}
client.println(">On</option>");
client.println("</select></p>");
}
void setPinStates()
{
for (int i = 0; i < numPins; i++)
digitalWrite(pins[i], pinState[i]);
digitalWrite(pins[numPins],1);
delay(300);
digitalWrite(pins[numPins],0);
if((pinState[numPins-1])||(pinState[numPins-2])||(pinState[0]))
{
pinState[0]=0;
pinState[numPins-1]=0;
pinState[numPins-2]=0;
delay(300);
for (int i = 0; i < numPins; i++)
digitalWrite(pins[i], pinState[i]);
digitalWrite(pins[numPins],1);
delay(300);
digitalWrite(pins[numPins],0);
}
}
void setValuesFromParams()
{
for (int i = 0; i < numPins; i++)
{
pinState[i] = valueOfParam(i + '0');
}
}
void readHeader(EthernetClient client)
{
// read first line of header
char ch;
int i = 0;
while (ch != '\n')
{
if (client.available())
{
ch = client.read();
line1[i] = ch;
i ++;
}
}
line1[i] = '\0';
Serial.println(line1);
}
boolean pageNameIs(char* name)
{
// page name starts at char pos 4
// ends with space
int i = 4;
char ch = line1[i];
while (ch != ' ' && ch != '\n' && ch != '?')
{
if (name[i-4] != line1[i])
{
return false;
}
i++;
ch = line1[i];
}
return true;
}
int valueOfParam(char param)
{
for (int i = 0; i < strlen(line1); i++)
{
if (line1[i] == param && line1[i+1] == '=')
{
return (line1[i+2] - '0');
}
}
return pinState[param-'0'];
}
