[TriEmbed] Arduino Topic for Dec 7 Meeting?

Mon Dec 1 22:43:14 CST 2014

Have you tried adding debug print messages on the Arduino to see what it is
doing?

For example, adding one at the start and end of setup(), then at the start
of loop(), then just inside the "if (client)", and then within the "while
(client.connected)" - this will let you know where in the code you are
getting hung up.

On Mon, Dec 1, 2014 at 11:01 PM, Jon Wolfe <jonjwolfe at anibit.com> wrote:

> 9 volt batteries are notiously flaky. Not saying it's definitely the
> culprit, but I've lost sleep over them in the past. They're good at looking
> fine under no or light load.
>
> Also, what subnet mask is in use in your code? How are you trying to
> connect to the arduino over the lan? Does it work as a client (might be
> easier to make sure that works first).
>
> Those are just some ideas off the top of my head...
>
> You could also try the app. "fing" on a pc or tablet. It scans local ip
> networks. There used to be some arp tools back in the day on unix that
> could find stuff by mac address,  I think even if tcp/ip was not
> functional.
>
>
>
> -------- Original message --------
> From: Dwight Morgan
> Date:12/01/2014 10:47 PM (GMT-05:00)
> To: triembed at triembed.org
> Subject: [TriEmbed] Arduino Topic for Dec 7 Meeting?
>
> I’m a newbie and going through the Simon Monk book, “Programming Arduino
> Getting Started with Sketches”. I am stuck on chapter 10, “Arduino Ethernet
> Programming”. I have tried numerous things to get the Arduino to act as a
> server but it just won’t connect. I’m running Windows 7 on my PC and I have
> a Netgear router for my wireless router with 4 wired ports. I’ve plugged
> the RJ45 into the router and my PC and tried different IP addresses that
> are not taken by my router already but nothing works. I cut off the
> firewall once but that didn’t help. I replaced the Ethernet shield and the
> UNO but that didn’t help. I’m trying to run the simplest code as best I can
> tell which is the Monk example code 10-01 copied below for reference:
>
>
>
> // sketch 10-01 Simple Server Example
>
>
>
> #include <SPI.h>
>
> #include <Ethernet.h>
>
>
>
>
>
> // MAC address just has to be unique. This should work
>
> byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
>
> // The IP address will be dependent on your local network:
>
> byte ip[] = { 192, 168, 1, 30 };
>
>
>
> EthernetServer server(80);
>
>
>
> void setup()
>
> {
>
>   Ethernet.begin(mac, ip);
>
>   server.begin();
>
>   Serial.begin(9600);
>
> }
>
>
>
> void loop()
>
> {
>
>   // listen for incoming clients
>
>   EthernetClient client = server.available();
>
>   if (client)
>
>   {
>
>     while (client.connected())
>
>     {
>
>       // send a standard http response header
>
>       client.println("HTTP/1.1 200 OK");
>
>       client.println("Content-Type: text/html");
>
>       client.println();
>
>
>
>       // send the body
>
>       client.println("<html><body>");
>
>       client.println("<h1>Arduino Server</h1>");
>
>       client.print("<p>A0=");
>
>       client.print(analogRead(0));
>
>       client.println("</p>");
>
>       client.print("<p>millis=");
>
>       client.print(millis());
>
>       client.println("</p>");
>
>       client.println("</body></html>");
>
>       client.stop();
>
>     }
>
>     delay(1);
>
>   }
>
> }
>
>
>
> One potential thing I have not covered is the power supply. I’m unplugging
> the USB as instructed in the book and plugging in a 9 Volt battery pack –
> all I have right now for power. I have a 9 Volt 1.5 Amp power supply on
> order to get here Friday. I’m not sure if that is a problem or not.
>
>
>
> I’m running Arduino IDE 1.0.4. The board is Arduino UNO and the Ethernet
> shield is made by Seeed.
>
>
>
> If this is something someone with more experience could talk about at the
> meeting I definitely have an interest. I have looked online for solutions
> but nothing so far has worked. If this topic does not serve the group well,
> I understand, but maybe someone who has knowledge of this could just give
> me some directions to get me back on the right path.
>
>
>
> Thanks!
>
>
>
> Dwight
>
> _______________________________________________
> Triangle, NC Embedded Computing mailing list
> TriEmbed at triembed.org
> http://mail.triembed.org/mailman/listinfo/triembed_triembed.org
> TriEmbed web site: http://TriEmbed.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.triembed.org/pipermail/triembed_triembed.org/attachments/20141201/969745a5/attachment.htm>