Hi everyone,
My first post here hope someone can tell me what i do wrong ...
The project is for a central heating system. The purpose is to operate it over ethernet.
First of all thank you for reading my post
.
Arduino uno R3, software v1.0.2 on Mac os x
The problem: The ethnetnet shield is unreachable after a few day's. I did look for some solutions, i found that my SRAM memory was overflowing so i made a new program. The SRAM usage is printed in web browser and reports over 1300byte of free memory so i guess there is no more problem with the SRAM.
Also when the shield is unreachable the program is still running, so i still have hot water but can not access the web interface anymore.
Comments, suggestions on the code are appreciated
My program:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0x57, 0x49, 0x5A };
IPAddress ip(192,168,2, 38);
static char baseurl[]="http://192.168.2.38/";
byte gateway[] = {
192, 168, 2, 1 };
byte subnet[] = {
255, 255, 255, 0 };
String readString = "";
EthernetServer server(80);
void setup() {
Serial.begin(115200);
SetupAnalogInput();
sensors.begin();
sensors.setResolution(outsideThermometer, 10);
//test
pinMode(4, OUTPUT); // SD select pin
digitalWrite(4, HIGH); // Explicitly disable SD
pinMode(10, OUTPUT); // Ethernet select pin
digitalWrite(10, LOW); // Explicitly enable Network
Ethernet.begin(mac, ip, gateway, subnet);
delay(1000);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
wdt_enable(WDTO_2S);
}
void loop() {
wdt_reset();
listenForEthernetClients(Tbuiten,Tketel,Tboiler,Twens);
// Every 5 Sec update temperature
if((long)millis()-eventTimeout>=0) {
eventTimeout=(long)millis() + 5000;
sensors.requestTemperatures();
Tbuiten = GetTemperature(outsideThermometer);
}
// Every 3 Sec update verwarming
if((long)millis()-eventTimeout2>=0) {
eventTimeout2=(long)millis() + 3000;
// boiler temperatuur 23°c = 852 90°C= 676ohm => 67°C/155,79
Tboiler = (23 + ((GetTemperatureVerwarming(A1, 5)-852) * 430 / 1000));
// ketel temperatuur omzetting
//831 -> 1K4 + 540 (23°C) => 3,3V * 540 /(540+1405) / 1,1V/1023 (10bit) = 831
Tketel = (23 + ((GetTemperatureVerwarming(A0, 5)-852) * 475 / 1000));
//Serial.print(Tketel);
if(mode == 2){
// Verwarming Dag
if(Tbuiten <= -10){
Twens = 70;
}
else if(Tbuiten > 27){
Twens = 0;
}
else {
Twens = ( 70 - ((Tbuiten + 10) / k));
}
}
else if(mode == 3){
// Verwarming Nacht
if(Tbuiten <= -10){
Twens = 45;
}
else if(Tbuiten > 20){
Twens = 0;
}
else {
Twens = ( 45 - ((Tbuiten + 10) / (2*k)));
}
}
//Do(byte mode, int Tketel, int Tboiler, int Tout, float Twens)
Viessmann.Do(mode, Tketel, Tboiler, Tbuiten, Twens);
}
}
//--------------------------------------------------------------------------
void listenForEthernetClients(float fTbuiten, float fTketel, float fTboiler, float fTwens) {
boolean SBrander = 1;
boolean SPverw = 1;
boolean SPboil = 1;
boolean data_found=0;
char Tketel[7] = "100.0";
char Tboil[7] = "100.0";
char Tbuiten[7] = "100.0";
char Tomloop[7] = "0.0";
byte lengte = 0;
//Serial.print(Tbuit);
// Convert float to string
dtostrf(fTbuiten,3,2,Tbuiten);
dtostrf(fTketel,4,1,Tketel);
dtostrf(fTboiler,4,1,Tboil);
dtostrf(fTwens,4,1,Tomloop);
//clearing string for next read
readString="";
//test
server.begin();
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
if( c == '?')
data_found = true;
//read first 100 chars
//read char by char HTTP request
if ((lengte < 25) && (data_found)) {
lengte ++;
//store characters to string
readString += c;
//Serial.print(c);
if (readString.length() > 30) {
readString = "";
}
}
else if((lengte >= 25) && (data_found)) {
if(readString.indexOf("cmd=0") >0)//checks for on
{
mode = 0;
}
if(readString.indexOf("cmd=1") >0)//checks for on
{
mode = 1;
}
if(readString.indexOf("cmd=2") >0)//checks for on
{
mode = 2;
}
if(readString.indexOf("cmd=3") >0)//checks for on
{
mode = 3;
}
data_found = false;
}
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// send a standard http response header
client.println(F("HTTP/1.1 200 OK Content-Type: text/html Connnection: close"));
client.println();
client.println(F("<!DOCTYPE HTML><html><meta http-equiv=\"refresh\" content=\"5;URL='"));
// add a meta refresh tag, so the browser pulls again every 5 seconds:
client.print(baseurl);
client.println(F("'\"><center><p><h1>Welcome to Viessmann Atola Ethernet Shield V1.0 </h1></p><hr><br> <h2><font color=\"blue\">-- Status online -- <br> Temperatuur Ketel: "));
client.print(Tketel);
client.println(F(" °C<br> Temperatuur Boiler: "));
client.print(Tboil);
client.println(F(" °C<br> Temperatuur Buiten: "));
client.print(Tbuiten);
client.println(F(" °C<br> Gewenste omloop temperatuur: "));
client.print(Tomloop);
client.println(F(" °C<br> <br> Status Brander: "));
if (Viessmann.BranderStatus())
client.println(F("Aan"));
else
client.println(F("Uit"));
client.println(F("<br> Status Pomp verwarming: "));
if (Viessmann.PompVerwarmingStatus())
client.println(F("Aan"));
else
client.println(F("Uit"));
client.println(F("<br> Status pomp Boiler: "));
if (Viessmann.PompBoilerStatus())
client.println(F("Aan"));
else
client.println(F("Uit"));
client.println(F("<br></font></h2></center><hr><center><form METHOD=get>"));
// knoppen
if(mode==0)
client.println(F("<button type=submit name=\"cmd\" value=\"0\"><B STYLE=\"color: red;\">Verwarming Uit</B></button>"));
else
client.println(F("<button type=submit name=\"cmd\" value=\"0\">Verwarming Uit</button>"));
if(mode==1)
client.println(F("<button type=submit name=\"cmd\" value=\"1\"><B STYLE=\"color: red;\">Enkel Warmwater</B></button>"));
else
client.println(F("<button type=submit name=\"cmd\" value=\"1\">Enkel Warmwater</button>"));
if(mode==3)
client.println(F("<button type=submit name=\"cmd\" value=\"3\"><B STYLE=\"color: red;\">Verwarming Nacht</B></button>"));
else
client.println(F("<button type=submit name=\"cmd\" value=\"3\">Verwarming Nacht</button>"));
if(mode==2)
client.println(F("<button type=submit name=\"cmd\" value=\"2\"><B STYLE=\"color: red;\">Verwarming Dag</B></button></form></center><hr>"));
else
client.println(F("<button type=submit name=\"cmd\" value=\"2\">Verwarming Dag</button></form></center><hr>"));
client.println(F("FreeMemory: "));
client.print(freeMemory());
client.println(F(" KB</html>"));
client.println();
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
}
else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(5);
// close the connection:
//client.stop();
client.stop();
byte g=0;
while((client.status() != 0) && g < 100) { // ADDED Aug 2 (http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1235991468)
delay(5);
g++;
//Serial.println(F("Wait!"));
}
client.flush();
client.stop();
}
Kind regards,
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