Hello Everyone,
Can you please give me your opinion on something I am working on? I am stuck on the same error for days and I can't figure this one out.
I modified W.A. Smith's SD Card Web Server I/O tutorial to fit my needs, the tutorial is great and I completed it with no issues.
I added a DHT11 sensor for temperature and humidity for this setup and I would like to use an RF transmitter to remotely operate my radio controlled power outlets.
I read the values from the remote and I created a sketch that can turn on and off each outlet - so that part is working fine.
I am able to read and display the DHT sensor values and I can control LED-s remotely from the SD card hosted website.
But when I try to modify the script to send a " mySwitch.send();" command instead of turning on the LED, it translates fine, I can upload to the Arduino but I can't access the webpage this way... the request times out and nothing happens.
My RF transmitter is on pin7 and the DHT is on pin 2.
I tried to use other available pins but didn't help. I am using an Uno with 328-PU.
The website is hosted on the sD card.
I attached my code, please advice, any suggestion is highly appreciated since I am out of ideas on my own:
/*--------------------------------------------------------------
Pin0: Free
Pin1: Free
Pin2: DHT
Pin3: Free
Pin4: SD?
Pin5: Free
Pin6: Free
Pin7: RF
Pin8: Free
Pin9: Free
pin10: Ethernet?
Pin11: Ethernet?
Pin12: Ethernet?
Pin13: Ethernet?
A0: Ethernet
A1: Ethernet
Based on the script by Author: W.A. Smith, http://startingelectronics.com
--------------------------------------------------------------
*/
#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>
#include <RCSwitch.h>
#include "DHT.h"
// size of buffer used to capture HTTP requests
#define REQ_BUF_SZ 60
#define DHTPIN 2
#define DHTTYPE DHT11
//RadioControl:
RCSwitch mySwitch = RCSwitch();
int RCTransmissionPin = 7;
//Ethernet
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1,177);
EthernetServer server(80);
File webFile;
char HTTP_req[REQ_BUF_SZ] = {0};
char req_index = 0;
boolean LED_state[4] = {0};
//DHT
DHT dht(DHTPIN, DHTTYPE);
void setup()
{
// disable Ethernet chip
pinMode(10, OUTPUT);
digitalWrite(10, HIGH);
Serial.begin(9600); // for debugging
// initialize SD card
Serial.println("Initializing SD card...");
if (!SD.begin(4)) {
Serial.println("ERROR - SD card initialization failed!");
return; // init failed
}
Serial.println("SUCCESS - SD card initialized.");
// check for index.htm file
if (!SD.exists("index.htm")) {
Serial.println("ERROR - Can't find index.htm file!");
return; // can't find index file
}
Serial.println("SUCCESS - Found index.htm file.");
Ethernet.begin(mac, ip); // initialize Ethernet device
server.begin(); // start to listen for clients
//initialize RF Transmiter
mySwitch.enableTransmit( RCTransmissionPin );
mySwitch.setPulseLength(185);
//Initialize DHT sensor
dht.begin();
pinMode(9, OUTPUT);
}
void loop()
{
EthernetClient client = server.available(); // try to get client
Serial.println("server.available");
if (client) { // got client?
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) { // client data available to read
char c = client.read(); // read 1 byte (character) from client
// limit the size of the stored received HTTP request
// buffer first part of HTTP request in HTTP_req array (string)
// leave last element in array as 0 to null terminate string (REQ_BUF_SZ - 1)
if (req_index < (REQ_BUF_SZ - 1)) {
HTTP_req[req_index] = c; // save HTTP request character
req_index++;
}
// last line of client request is blank and ends with \n
// respond to client only after last line received
if (c == '\n' && currentLineIsBlank) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
// remainder of header follows below, depending on if
// web page or XML page is requested
// Ajax request - send XML file
if (StrContains(HTTP_req, "ajax_inputs")) {
// send rest of HTTP header
client.println("Content-Type: text/xml");
client.println("Connection: keep-alive");
client.println();
SetLEDs();
// send XML file containing input states
XML_response(client);
}
else { // web page request
// send rest of HTTP header
client.println("Content-Type: text/html");
client.println("Connection: keep-alive");
client.println();
// send web page
webFile = SD.open("index.htm"); // open web page file
if (webFile) {
while(webFile.available()) {
client.write(webFile.read()); // send web page to client
}
webFile.close();
}
}
// display received HTTP request on serial port
Serial.print(HTTP_req);
// reset buffer index and all buffer elements to 0
req_index = 0;
StrClear(HTTP_req, REQ_BUF_SZ);
break;
}
// every line of text received from the client ends with \r\n
if (c == '\n') {
// last character on line of received text
// starting new line with next character read
currentLineIsBlank = true;
}
else if (c != '\r') {
// a text character was received from client
currentLineIsBlank = false;
}
} // end if (client.available())
} // end while (client.connected())
delay(1); // give the web browser time to receive the data
client.stop(); // close the connection
} // end if (client)
}
void SetLEDs(void)
{
//switch1 ON
if (StrContains(HTTP_req, "Kapcsolo1ON")) {
mySwitch.send(4527411, 24);
}
//switch1 OFF
if (StrContains(HTTP_req, "Kapcsolo1OFF")) {
mySwitch.send(4527420, 24);
}
if (StrContains(HTTP_req, "Kapcsolo2ON")) {
mySwitch.send(4527555, 24);
}
if (StrContains(HTTP_req, "Kapcsolo2OFF")) {
mySwitch.send(4527564, 24);
}
if (StrContains(HTTP_req, "Kapcsolo3ON")) {
mySwitch.send(4527875, 24);
}
if (StrContains(HTTP_req, "Kapcsolo3OFF")) {
mySwitch.send(4527884, 24);
}
if (StrContains(HTTP_req, "MindenON")) {
mySwitch.send(4527411, 24);
mySwitch.send(4527555, 24);
mySwitch.send(4527875, 24);
}
if (StrContains(HTTP_req, "MindenOFF")) {
mySwitch.send(4527420, 24);
mySwitch.send(4527464, 24);
mySwitch.send(4527884, 24);
}
}
// send the XML file with analog values, switch status
// and LED status
void XML_response(EthernetClient cl)
{
//int analog_val; // stores value read from analog inputs
int count; // used by 'for' loops
float h = dht.readHumidity();
float t = dht.readTemperature();
cl.print("<?xml version = \"1.0\" ?>");
cl.print("<inputs>");
cl.print("<TEMP>");
cl.print(t);
cl.println("</TEMP>");
cl.print("<HUM>");
cl.print(h);
cl.println("</HUM>");
cl.print("</inputs>");
}
// sets every element of str to 0 (clears array)
void StrClear(char *str, char length)
{
for (int i = 0; i < length; i++) {
str[i] = 0;
}
}
// searches for the string sfind in the string str
// returns 1 if string found
// returns 0 if string not found
char StrContains(char *str, char *sfind)
{
char found = 0;
char index = 0;
char len;
len = strlen(str);
if (strlen(sfind) > len) {
return 0;
}
while (index < len) {
if (str[index] == sfind[found]) {
found++;
if (strlen(sfind) == found) {
return 1;
}
}
else {
found = 0;
}
index++;
}
return 0;
}
Thanks and regards,