Connecting with username and password

Projects Networking, Protocols, and Devices
1

I'm trying to use the arduino to talk to a networked power strip

See connection information here http://www.synaccess-net.com/downloadDoc/NPStartup-B.pdf

I've connected but cannot seem to send user and password

Any ideas where to start?

2

Any ideas where to start?

Yes post the code that contains your failed attempt at sending a password.

3

I'm modifing some example code,
I've removed the IP address of server and the user name and password in the code below

#include <SPI.h>
#include <Ethernet.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };

IPAddress server(00,00,00,00);  


// Set the static IP address to use if the DHCP fails to assign
IPAddress ip(192,168,0,177);

EthernetClient client;

void setup() {

  Serial.begin(9600);
   while (!Serial) {
    ;
  }

  // start the Ethernet connection:
  if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
   
    Ethernet.begin(mac, ip);
  }
  // give the Ethernet shield a second to initialize:
  delay(1000);
  Serial.println("connecting...");

 
  if (client.connect(server,90)) {
    Serial.println("connected");
 
    client.println("GET /cmd.cgi?$A1 username password");
  
  } 
  else {
   
    Serial.println("connection failed");
  }
}

void loop()
{
 
  if (client.available()) {
    char c = client.read();
    Serial.print(c);
  }
while (Serial.available()>0){
  char inChar=Serial.read();
  if(client.connected()){
    client.print(inChar);
  }
}
  // if the server's disconnected, stop the client:
  if (!client.connected()) {
    Serial.println();
    Serial.println("disconnecting.");
    client.stop();

    // do nothing forevermore:
    while(true);
  }
}

Yields:
connecting...
connected
HTTP/1.1 401 Unauthorized
WWW-Authenticate: Basic realm="Protected"
Connection: close

401 Unauthorized: Password required

disconnecting.

4

Spaces and dollar signs are not allowed in a url. Maybe if you url encode them it would work

 client.println("GET /cmd.cgi?%26A1%20username%20password");
5

Interesting, I tried your suggestion and while this may be unrelated I'm now getting the follow response

connecting...
connected
HTTP/1.1 414 Request-URI Too Long
Connection: close
414 Request-URI Too Long: Buffer overflow detected
disconnecting.

6

The startup guide is not very clear. It contains url errors, so it may be a matter of trial and error. Start with this:

client.println("GET /cmd.cgi?cmdCode=%26A1&Arg1=username&Arg2=password");

...and this:

client.println("GET /cmd.cgi?%26A1&username&password");

edit: If those fail, try accessing the power strip with a web browser.
http://device-ip
Then view the source of the login page. That might get you the info you need.

7

Yeah the guide is bad, most of the commands work when typed in the browser like the $A5 command returns 0000 0001 etc

the $A1 gives a $AF response indicating an error

8

Did you try viewing the source of the login page? The guide says
http://192.168.1.100

Then select "view source" on the browser tools. I don't know what web browser you use and they are different in the way you view the source, but on that page there should be a login form. If you post that, maybe we can help you determine how to get your Arduino to login.