Hi all,
I use an ethernet shield on an Arduino UNO...
I want to use Ethernet to communicate with a computer via a client socket and under certain conditions (if the network is not connected) the Arduino will retrieve the data on the SD card...
how can i sort out those conditions to run the line of code..
sorry for asking, I'm new to this...
here are the lines of code that I have..
/**********************************
* Ethernet Server Arduino WIZ5100
* www.ardutech.com
*
*********************************/
#include <Ethernet.h>
#include <WiegandMulti.h>
#include <SdFat.h>
#include <WiegandMulti.h>
#include <string.h>
String pch;
WIEGANDMULTI wg;
WIEGANDMULTI wg2;
SdFat sd;
SdFile file;
const uint8_t SD_CHIP_SELECT = 4;
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1,189);
EthernetServer server(80);
char str;
const int relay1 = 8; //pin2
const int relay2 = 9; //pin3
int relayON = HIGH; //relay nyala
int relayOFF = LOW; //relay mati
void Reader1D0Interrupt(void)
{
wg.ReadD0();
}
void Reader1D1Interrupt(void)
{
wg.ReadD1();
}
void Reader2D0Interrupt(void)
{
wg2.ReadD0();
}
void Reader2D1Interrupt(void)
{
wg2.ReadD1();
}
bool findStringInFile(const char *filename, const char *searchString, size_t &pos) {
File file = sd.open("data.txt", FILE_READ);
if (!file) return false; // File not found
size_t searchLen = strlen(searchString);
size_t index = 0;
pos = 0;
while (file.available()) {
char ch = file.read();
if (ch == searchString[index]) {
index++;
if (index == searchLen) { // Match found
pos = file.position() - searchLen;
file.close();
return true;
}
} else {
index = (ch == searchString[0]) ? 1 : 0; // Reset index or start new match (not foolproof)
}
}
file.close();
return false; // String not found
}
void setup() {
Serial.begin(115200);
wg.begin(2,3,Reader1D0Interrupt,Reader1D1Interrupt);
wg2.begin(4,5,Reader2D0Interrupt,Reader2D1Interrupt);
//wg2.begin(4,5,Reader2D0Interrupt,Reader2D1Interrupt);
pinMode(relay1, OUTPUT);
pinMode(relay2, OUTPUT);
digitalWrite(relay1, relayOFF);
digitalWrite(relay2, relayOFF);
Ethernet.begin(mac, ip);
pinMode(10, OUTPUT);
server.begin();
//ACCESS TO SD
if (!sd.begin(SD_CHIP_SELECT, SPI_HALF_SPEED))
{
if (sd.card()->errorCode()) {
Serial.println("SD initialization failed.");
} else if (sd.vol()->fatType() == 0) {
Serial.println("Can't find a valid FAT16/FAT32 partition.");
} else {
Serial.println("Can't determine error type");
}
return;
}
}
void loop()
{
EthernetClient client = server.available();
if (client.available() > 0)
{
if(wg.available())
{
client.print("A");
client.print(wg.getCode());
Serial.print(wg.getCode());
delay(100);
}
if(wg2.available())
{
Serial.print(wg2.getCode());
client.print("B");
client.print(wg2.getCode());
delay(100);
}
}
if (client.available() > 0)
{
str = client.read();
if(str=='1')
{ digitalWrite(relay1, relayON);
delay(10);
digitalWrite(relay1, relayOFF);
delay(10);
client.print("AOK");
//client.println("Pintu Masuk dibuka!");
}
else if(str=='3')
{
digitalWrite(relay2, relayON);
delay(10);
digitalWrite(relay2, relayOFF);
delay(10);
client.print("BOK");
}
}
if (!(client.connected()))
{
client.stop();
}
//Access SD card
if(wg.available())
{
Serial.print(wg.getCode());
size_t position;
char wgText[15]; // large enough to store the ASCII representation
snprintf(wgText, sizeof wgText, "%lu", wg.getCode() ); // see https://cplusplus.com/reference/cstdio/snprintf/
Serial.print(snprintf(wgText, sizeof wgText, "%lu", wg.getCode() ));
if (findStringInFile("data.txt", wgText, position)) {
Serial.print(" String found ");
digitalWrite(relay1, relayON);
delay(10);
digitalWrite(relay1, relayOFF);
//Serial.println(position);
} else {
Serial.println(" String not found");
}
}
if(wg2.available())
{
Serial.print(wg2.getCode());
size_t position;
char wgText[15]; // large enough to store the ASCII representation
snprintf(wgText, sizeof wgText, "%lu", wg.getCode() ); // see https://cplusplus.com/reference/cstdio/snprintf/
Serial.print(snprintf(wgText, sizeof wgText, "%lu", wg.getCode() ));
if (findStringInFile("data.txt", wgText, position)) {
Serial.print(" String found ");
digitalWrite(relay2, relayON);
delay(10);
digitalWrite(relay2, relayOFF);
//Serial.println(position);
} else {
Serial.println(" String not found");
//wg.getCode().close;
}
}
}
