enc28j60 with arduino and local web service - arduino

[mahe1978]

I am trying to use Arduino Uno with ENC28j60 to send data to my local web server
the URL i used is ( http://192.168.10.6:8338/heartbeat?table=1)
when i use this URL in browser it return "OK".
with Arduino
i use this code but i can't get a result

#include <EtherCard.h>

// ethernet interface mac address, must be unique on the LAN
static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 };

byte Ethernet::buffer[700];
static uint32_t timer;

const char website[] PROGMEM = "192.168.10.6";

// called when the client request is complete
static void my_callback (byte status, word off, word len) {
Serial.println(">>>");
Ethernet::buffer[off+300] = 0;
Serial.print((const char*) Ethernet::buffer + off);
Serial.println("...");
}

void setup () {
Serial.begin(57600);
Serial.println(F("\n[webClient]"));

// Change 'SS' to your Slave Select pin, if you arn't using the default pin
if (ether.begin(sizeof Ethernet::buffer, mymac, SS) == 0)
Serial.println(F("Failed to access Ethernet controller"));
if (!ether.dhcpSetup())
Serial.println(F("DHCP failed"));

ether.printIp("IP: ", ether.myip);
ether.printIp("GW: ", ether.gwip);
ether.printIp("DNS: ", ether.dnsip);

#if 1
// use DNS to resolve the website's IP address
//if (!ether.dnsLookup(website))
// Serial.println("DNS failed");
char websiteIP[] = "192.168.10.6";
ether.parseIp(ether.hisip, websiteIP);

#elif 2
// if website is a string containing an IP address instead of a domain name,
// then use it directly. Note: the string can not be in PROGMEM.
char websiteIP[] = "192.168.10.6";
ether.parseIp(ether.hisip, websiteIP);
#else
// or provide a numeric IP address instead of a string
byte hisip[] = { 192,168,10,6 };
ether.copyIp(ether.hisip, hisip);
#endif

ether.printIp("SRV: ", ether.hisip);
}

void loop () {
ether.packetLoop(ether.packetReceive());

if (millis() > timer) {
timer = millis() + 5000;
Serial.println();
Serial.print("<<< REQ ");
ether.hisport = 8338;//to access local host
ether.browseUrl(PSTR("/heartbeat?"), "table=3", website, my_callback);
// ether.browseUrl(PSTR("/heartbeat?table=3"), "", website, my_callback);

}
}

Serial Output :
[webClient]
IP: 192.168.10.5
GW: 192.168.10.1
DNS: 203.145.184.32
SRV: 192.168.10.6

<<< REQ
<<< REQ
<<< REQ
<<< REQ
<<< REQ
<<< REQ
<<< REQ
<<< REQ

how to send " HTTP GET with request headers " Using Ethercard library(Web Client), to Local-IP Address. Thanks a lot in advance for any help/info.

[nuno-silva]

I took a quick look at your code and didn't find anything wrong with it, except that you can remove the code between the #elif 2 and #endif macros as well as the website variable.
That being said, here's a few things you can try:

• setup wireshark or tcpdump on the 192.168.10.6 machine and see if you are getting any traffic at all from the arduino
• long shot, but make sure the mymac MAC address is unique in your LAN (e.g. if you have any other ethercards running, make sure they have different MACs)
• try the https://github.com/njh/EtherCard/blob/master/examples/webClient/webClient.ino example without changing anything and see it that works. Then, work your way up step by step until you transform the example into what you need. Make sure it still works with every step. This will help finding any mistake (or bug in the library) easier along the way. E.g:
  • change from www.google.com to whatever google's IP is (e.g. 216.58.209.67)
  • then change from google's IP to 192.168.10.6
  • then change from port 80 to port 8338
  • then change the URL

Good luck!

[mahe1978]

Hi nuno-silva
Thank you for your quick reply...
I tried with your suggestion
I receive server reply only if domain name is "www.google.com"

ether.browseUrl(PSTR("/search?"), PSTR("source=hp&ei=I2MqX6zHLdf8rQGo7LPIAg&q=test&oq=test&gs_lcp=CgZwc3ktYWIQAzIFCAAQsQMyBQgAELEDMgIIADIFCAAQsQMyCAgAELEDEIMBMgUIABCxAzIICAAQsQMQgwEyBQgAELEDMgUIABCxAzICCAA6BQguELEDOgsILhCxAxDHARCjAjoCCC5Q2hRYshpg3x5oAHAAeACAAXaIAYADkgEDMy4xmAEAoAEBqgEHZ3dzLXdpeg&sclient=psy-ab&ved=0ahUKEwjs5IC6yIPrAhVXfisKHSj2DCkQ4dUDCAY&uact=5"), website, my_callback);

chnaging codes like
a)const char website[] PROGMEM = "192.168.10.6:8338";
ether.browseUrl(PSTR("/heartbeat?"), "", website, my_callback);
b)const char website[] PROGMEM = "192.168.10.6";
ether.hisport = 8338;
ether.browseUrl(PSTR("/heartbeat?"), "", website, my_callback);

and even tried
ether.browseUrl(PSTR("/heartbeat?"), "", "http://192.168.10.6:8338", my_callback);
ether.browseUrl(PSTR("/heartbeat?"), "", (PSTR("http://192.168.10.6:8338"), my_callback);

I can see the same old Serial Output
[webClient]
SRV: 192.168.10.6

<<< REQ
<<< REQ

If anyone is able to help me, that would be great.

[nuno-silva]

If you weren't able to get a response using google's IP directly, either there's an issue with ether.parseIp or you're doing something wrong :/ You did call ether.parseIp, right?

[mahe1978]

Hi,
Thank you for your Suggestions.

• I tried StaticIP code example.

#include <EtherCard.h>

#define REQUEST_RATE 5000 // milliseconds

// ethernet interface mac address
static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 };
// ethernet interface ip address
static byte myip[] = { 192,168,10,180 };
// ethernet interface ip netmask
static byte mask[] = { 255,255,255,0 };
// gateway ip address
static byte gwip[] = { 192,168,10,1 };
// remote website ip address and port
static byte hisip[] = { 192,168,10,7};
//static byte hisip[] = { 100,21,172,105}; // google port 443
//static byte hisip[] = { 3,225,178,102}; //google port 80 & 443
// remote website name
const char website[] PROGMEM = "192.168.10.7";
//const char website[] PROGMEM = "google.com";

byte Ethernet::buffer[300]; // a very small tcp/ip buffer is enough here
static long timer;

// called when the client request is complete
static void my_result_cb (byte status, word off, word len) {
Serial.print("<<< reply ");
Serial.print(millis() - timer);
Serial.println(" ms");
Serial.println((const char*) Ethernet::buffer + off);
}

void setup () {
Serial.begin(57600);
Serial.println("\n[getStaticIP]");

// Change 'SS' to your Slave Select pin, if you arn't using the default pin
if (ether.begin(sizeof Ethernet::buffer, mymac, SS) == 0)
Serial.println( "Failed to access Ethernet controller");

ether.staticSetup(myip, gwip, NULL, mask);
//ether.hisport = 443;//to access local host
ether.copyIp(ether.hisip, hisip);
ether.printIp("Server: ", ether.hisip);

while (ether.clientWaitingGw())
ether.packetLoop(ether.packetReceive());
Serial.println("Gateway found");

timer = - REQUEST_RATE; // start timing out right away
}

void loop () {
ether.packetLoop(ether.packetReceive());

if (millis() > timer + REQUEST_RATE) {
timer = millis();
Serial.println("\n>>> REQ");
// ether.browseUrl(PSTR("/foo/"), "bar", website, my_result_cb);
//http://192.168.10.7
// ether.browseUrl(PSTR("/heartbeat?"), PSTR("table=3"), website, my_result_cb);
//ether.browseUrl("","", PSTR("http://192.168.10.7"), my_result_cb);
ether.browseUrl("","", website, my_result_cb);
}
}

Output:
[getStaticIP]
Server: 192.168.10.7
Gateway found

REQ

REQ

REQ

• Using Google ip i am getting response,

Server: 3.225.178.102
Gateway found

REQ
<<< reply 807 ms
HTTP/1.1 404 Not Found
Content-Type: text/plain; charset=utf-8
Date: Thu, 06 Aug 2020 10:21:15 GMT
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload
Content-Length: 21
Connection: Close

default backend - 404

but i am trying with local ip there is no response.

• from server i can ping arduino static ip, from other laptop i can ping sever.
• In the laptop i tried configuration as below, there was response from server.

// ethernet interface ip address
static byte myip[] = { 192,168,10,180 };
// ethernet interface ip netmask
static byte mask[] = { 255,255,255,0 };
// gateway ip address
static byte gwip[] = { 192,168,10,1 };
// remote website ip address and port
static byte hisip[] = { 192,168,10,7};

• Library used

  name=EtherCard
  version=1.1.0

• I don't know why this isn't working.

[nuno-silva]

If you can get a response from google's IP but not from your server's IP, possible causes are:

• a firewall is blocking your server; try accessing the web server from another host (e.g. your laptop) to see if it works;
• your server is not listening on port 80 (did you try listening on port 80 before changing the port?).

Also note that as far as I know ethercard does not support TLS/SSL/HTTPS (port 443).