Hi again guys,
Now I'm facing a new problem that I cannot manage, and looking forward for your help.
On Arduino Mega with W5100 I have setup a web server on SD card. So, I want to switch a led on/off from Index.html stored on card (with ajax), and everything is fine, but when I want to include the reading of 3 phases AC current everything is going very slow, and I cant figure out where is the problem? Please help!
My code without emonlib:
#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>
// size of buffer used to capture HTTP requests
#define REQ_BUF_SZ 60
// MAC address from Ethernet shield sticker under board
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192, 168, 1, 100); // IP address, may need to change depending on network
EthernetServer server(80); // create a server at port 80
File webFile; // the web page file on the SD card
char HTTP_req[REQ_BUF_SZ] = {0}; // buffered HTTP request stored as null terminated string
char req_index = 0; // index into HTTP_req buffer
boolean LED_state[4] = {0}; // stores the states of the LEDs
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.");
// LEDs
pinMode(8, OUTPUT);
Ethernet.begin(mac, ip); // initialize Ethernet device
server.begin(); // start to listen for clients
}
void loop()
{
EthernetClient client = server.available(); // try to get client
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();
}
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)
{
// RelayImpulse1 (pin 8)
if (StrContains(HTTP_req, "RelayImpulse1=1")) {
digitalWrite(8, HIGH);
delay(100);
digitalWrite(8, LOW);
}
else if (StrContains(HTTP_req, "RelayImpulse1=0")) {
digitalWrite(8, HIGH);
delay(100);
digitalWrite(8, LOW);
}
}
void StrClear(char *str, char length)
{
for (int i = 0; i < length; i++) {
str[i] = 0;
}
}
char StrContains(const char *str, const 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;
}
This will work fast enough, but when I put the following code I loose some inputs sent from webpage, my arduino will block and everything is so slow... (30 sec or more).
#include "EmonLib.h" // Include Emon Library
EnergyMonitor emon1; // Create an instance
EnergyMonitor emon2; // Create an instance
EnergyMonitor emon3; // Create an instance
void setup()
{
emon1.current(3,17.0); // Current: input pin, calibration.
emon2.current(4,17.0); // Current: input pin, calibration.
emon3.current(5,17.0); // Current: input pin, calibration.
}
void XML_response(EthernetClient cl)
{
double Irms1 = emon1.calcIrms(2000); // Calculate Irms only
double Irms2 = emon2.calcIrms(2000); // Calculate Irms only
double Irms3 = emon3.calcIrms(2000); // Calculate Irms only
// read analog pin A3
cl.print("<analog>");
cl.print(" ");
cl.print(Irms1*230.0/1000); // Apparent power
cl.println("</analog>");
cl.print("<analog>");
cl.print(" ");
cl.println(Irms1); // Irms
cl.println("</analog>");
// read analog pin A4
cl.print("<analog>");
cl.print(" ");
cl.print(Irms2*230.0/1000); // Apparent power
cl.println("</analog>");
cl.print("<analog>");
cl.print(" ");
cl.println(Irms2); // Irms
cl.println("</analog>");
// read analog pin A5
cl.print("<analog>");
cl.print(" ");
cl.print(Irms3*230.0/1000); // Apparent power
cl.println("</analog>");
cl.print("<analog>");
cl.print(" ");
cl.println(Irms3); // Irms
cl.println("</analog>");
// read current sum
cl.print("<analog>");
cl.print(" ");
cl.print((Irms1+Irms2+Irms3)*230.0/1000); // Apparent power
cl.println("</analog>");
cl.print("<analog>");
cl.print(" ");
cl.println(Irms1 + Irms2 + Irms3); // Irms
cl.println("</analog>");
}
Please ,help me with some idea or code example, because I'm stuck (end very beginner).
Thank you!