Feeling a bit silly stumbling across something that is probably very easy ... but , being a newbie I guess no question is stupid ...
Anyhow , I have found in the forum a simple sample of a webpage with pushbuttons , and modified it a bit to light diodes.
That works fine , but now I´d like the Arduino to get a voltagereading from a potentiometer and display the result ( Readvalue) on this webpage ... have tried looking around for a solution ... but.. I am stuck ...
Here is the code :
/* Circuit:
- Ethernet shield attached to pins 10, 11, 12, 13
stift 2... också ?
*/
#include <EtherCard.h>
// Ethernet Part declaration
static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 };
#define BUFFER_SIZE 800
BufferFiller bfill;
byte Ethernet::buffer[BUFFER_SIZE];
static byte myip[] = {192,168,0,2};
// Ethernet Part ends here
// Diodepins definition
const int ledPin1 = 3;
const int ledPin2 = 4;
const int ledPin3 = 5;
//Volt meter start
//Analog volt read pin
const int voltPin = 0;
float Readvalue;
void setup () {
/* sök efter ip-adress till Arduinon */
Serial.begin(9600);
Serial.println("\n[Starting the Arduino Server]");
Serial.print("MAC: ");
for (byte i = 0; i < 6; ++i) {
Serial.print(mymac*, HEX);*
-
if (i < 5)*
-
Serial.print(':');*
-
}*
-
Serial.println();*
-
if (ether.begin(sizeof Ethernet::buffer, mymac) == 0)*
-
Serial.println( "Failed to access Ethernet controller");*
-
Serial.println("Setting up DHCP (this can take a while...)");*
-
if (!ether.dhcpSetup())*
-
Serial.println( "DHCP failed");*
-
ether.printIp("IP: ", ether.myip);*
-
ether.printIp("Netmask: ", ether.mymask);*
-
ether.printIp("GW IP: ", ether.gwip);*
-
ether.printIp("DNS IP: ", ether.dnsip);*
-
ether.printIp("Surf to this IP to view the Arduino Server: ", ether.myip);*
myip ==ether.myip;
/* initierad ...*/
//Ethernet Debugging
ether.begin(sizeof Ethernet::buffer, mymac);
ether.staticSetup(myip);
//Ethernet Debugging Ends Here
// Turn off all diodes
-
pinMode(ledPin1, OUTPUT);*
-
digitalWrite(ledPin1, LOW);*
-
pinMode(ledPin2, OUTPUT);*
-
digitalWrite(ledPin3, LOW);*
-
pinMode(ledPin3, OUTPUT);*
-
digitalWrite(ledPin3, LOW);*
}
void homepage(){ -
bfill.emit_p(PSTR(*
"Ethernet Controller"
""
Kalles Arduino-website
test
"
"
"
""
""
""
"Choose diode : "
"
xxx
-
));*
}
void http_Unauthorized(){ -
bfill.emit_p(PSTR("HTTP/1.0 401 Unauthorized\r\n"*
-
"Content-Type: text/html\r\n\r\n"*
-
"
401 Unauthorized
" * -
));*
}
void loop() { -
//checking for requesting client*
-
word len = ether.packetReceive();*
-
word pos = ether.packetLoop(len);*
-
if(pos) {*
-
bfill = ether.tcpOffset();*
-
//storing buffer on data variable*
_ char *data = (char *) Ethernet::buffer + pos;_ -
if (strncmp("GET /", data, 5) != 0) {*
-
// Unsupported HTTP request*
-
// 304 or 501 response would be more appropriate*
-
http_Unauthorized();*
-
}*
-
else {*
-
data += 5;*
-
if (data[0] == ' ') {*
-
// Return home page*
-
homepage();*
-
}*
-
else if (strncmp("?cmd=Red ", data, 8 ) == 0) {*
-
homepage();*
-
digitalWrite(ledPin1, HIGH); // Red diode on*
-
digitalWrite(ledPin2, LOW);*
-
digitalWrite(ledPin3, LOW);*
-
}*
-
else if (strncmp("?cmd=Yellow ", data, 11) == 0) {*
-
homepage();*
-
digitalWrite(ledPin1, LOW);*
-
digitalWrite(ledPin2, HIGH); // Yellow diode on*
-
digitalWrite(ledPin3, LOW);*
-
}*
-
else if (strncmp("?cmd=Green ", data, 10) == 0) {*
-
homepage();*
-
digitalWrite(ledPin1, LOW);*
-
digitalWrite(ledPin2, LOW);*
-
digitalWrite(ledPin3, HIGH); // Green diode on*
-
}*
-
else if (strncmp("?cmd=Off ", data, 8 ) == 0) {*
-
homepage();*
-
digitalWrite(ledPin1, LOW); // All off*
-
digitalWrite(ledPin2, LOW);*
-
digitalWrite(ledPin3, LOW);*
-
}*
-
else {*
-
// Page not found*
-
http_Unauthorized();*
-
}*
-
delay(1000);*
-
}*
-
Readvalue=VoltageMeasure();*
-
ether.httpServerReply(bfill.position());*
-
len ==0;*
-
}*
}
float VoltageMeasure()
{ -
float voltage;*
-
//volt meter start*
//Obtain RAW voltage data
voltage = analogRead(voltPin);
//Convert to actual voltage (0 - 5 Vdc)
voltage = (voltage / 1024) * 5.0;
return voltage;
}
Webpage_med_inmatning_av_data.ino (4.76 KB)