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Arduino Ethernet Problems

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Hon1nbo

Mon Apr 26 2010, 01:59AM

Registered Member #902 Joined: Sun Jul 15 2007, 08:17PM
Location: North Texas
Posts: 1040

hey ya'll,
I've been hard at work on my mini-sub, and I am now testing the remote operation. Problem is, the ability to access the arduino web page is intermittent even when using a direct ethernet patch. So far my only success was on my mom's Macbook, I got it working on my windows laptop a while back but used the macbook because my laptop has issues.

There are two modes of operation:

debugging via a direct ethernet patch cable to the arduino, and normal operation over fiber optic cable using two media converters.

I re-entered my custom settings on the laptop and it's not working now, and the indicator lights for LINK and RX are flashing at a specific rate, and the browser will either say immediately that the web page cannot be found or it will hang for a while and then stop. I am using the InventGeek Ethernet code with the only modifications being relevant IP changes and a few extra subroutines called by changing the URL (as for some reason if I add multiple buttons I can't get it to work)

Any Ideas? I can post more information, but I'm not sure what you'd need, as I figured the IP etc would really not affect the situation.

-Jimmy

Carbon_Rod

Mon Apr 26 2010, 04:19AM

Registered Member #65 Joined: Thu Feb 09 2006, 06:43AM
Location:
Posts: 1155

1. Get Wireshark, and log your raw connection
2. Ensure you are getting valid HTTP 1.0 response
3. Check your network adapter properties, and disable IPv6/VPN/UPnP etc.
4. Manually set the static IP address at each end (turns the DHCP off)
5. Disable other network adapters and firewalls while running tests
6. Also make sure the browsers Page Cache is not the issue (Press F5 to refresh page)

Possible situations:
* Power stability problems at the controller end causing "resets" (raw log will show multiple repeated DHCP configuration events).

* If the controller supports above HTTP 1.0 than it may be hanging if the secondary connections attempt to load another file at the same time without finishing the original. Raw log will also show if you are running aggressive "link safety" virus scanners. (The number of TCP connections such a small controller can support is likely few.)

* This may end up an easier solution

Cheers,

Hon1nbo

Mon Apr 26 2010, 12:37PM

Registered Member #902 Joined: Sun Jul 15 2007, 08:17PM
Location: North Texas
Posts: 1040

Carbon_Rod wrote ...

1. Get Wireshark, and log your raw connection
2. Ensure you are getting valid HTTP 1.0 response
3. Check your network adapter properties, and disable IPv6/VPN/UPnP etc.
4. Manually set the static IP address at each end (turns the DHCP off)
5. Disable other network adapters and firewalls while running tests
6. Also make sure the browsers Page Cache is not the issue (Press F5 to refresh page)

Possible situations:
* Power stability problems at the controller end causing "resets" (raw log will show multiple repeated DHCP configuration events).

* If the controller supports above HTTP 1.0 than it may be hanging if the secondary connections attempt to load another file at the same time without finishing the original. Raw log will also show if you are running aggressive "link safety" virus scanners. (The number of TCP connections such a small controller can support is likely few.)

* This may end up an easier solution

Cheers,

I'll get Wireshark then, but most everything else youve listed I am doing

I set my adapers manually using IP4 (and I know my computer settings worked because I got it to work, I think that something else is going on to make it intermittent

DHCP is off (Arduino ethernet library does not even support it)
the link is sirect, there is no other router and the mac does not have a firewall setup and if it does it isn't affecting things because it would have prevented my original successes

I use the refresh button mostly when trying to reload the paeg

When I do stop the arduino, the hanging page immediately tunrs to "cannot connect to server" message, so I assume the arduino is communicating somehow - I noticed online yesterday before going to bed that some people have had issues with it sending things one byte at a time, but I don't know if anything could suddenly trigger it to do that.

I'll try to log the connection, but my project is running out of time! - it's due in entirety (propulsion, remote control, and buoyancy control) by May 3, though I might be able to get buoyancy made to "proof of concept" by then which would work well enough

-Jimmy

Steve Conner

Mon Apr 26 2010, 01:19PM

Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706

Might be an issue with link detection and negotiation. Sometimes it doesn't work if you just connect two computers together with a patch cord. Have you tried connecting the Arduino to the laptop via an Ethernet hub, switch or so on?

Or maybe it's a bug in the Arduino libraries?

Carbon_Rod

Mon Apr 26 2010, 09:04PM

Registered Member #65 Joined: Thu Feb 09 2006, 06:43AM
Location:
Posts: 1155

* The network cable/pug may be intermittently defective too

* You could also check the PC network adapter configuration is forced into 10base asynchronous mode

Sometimes an RS422 adapter is a handy thing to have around

Hon1nbo

Mon Apr 26 2010, 10:14PM

Registered Member #902 Joined: Sun Jul 15 2007, 08:17PM
Location: North Texas
Posts: 1040

I tried Steve's suggestion to use a hub in between, and while a switch doesn't work an old router with some adjusted IP settings did! - not only does it work, I even got my iPhone controlling it over the router's wifi! - it may just as well become a standard part of my setup!

-Jimmy

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