Arduino Ethernet Shield and Router

[jamesroodney]

I've got a router (Linksys E2000) with dd-wrt in client mode connected to an arduino UNO running the Ethernet Light sketch. The serial monitor shows me the server IP but that's it, and the App can't find a workbench and gives me an error/time out message when I try to connect to the IP I get from the serial monitor. I believe this has to do with the Linksys router having a different subnet than my primary router, that is my primary 192.168.10.x and the linksys static WAN is 192.168.10.147 but it's giving the Arduino a 192.168.1.x LAN IP. Would this be the issue? I have tried setting the client router(linksys) LAN to the same subnet but that just crashed dd-wrt (ie I was unable to connect to the router with any IP's). What am I missing? Thanks!
I should also note that I turned off the client router firewall and placed it into DMZ on my primary router, not sure if that's the only thing I need to do about security getting in the way...

[jamesroodney]

Ok so I realized I should be using Client Bridged to be in the same subnet, followed the instructions to switch and am now on the same (192.168.10.x) subnet as the router. Also tried adding a virtual server entry for port 4042 on my primary router and moved the ethernet shield IP into the DMZ. Still not connecting, what else am I missing?

[jamesroodney]

I noticed that I can ping the IP of the arduino. Also occasionally the router status will list both the arduino and the tablet (with the EVO app) but only while I am manually trying to connect and not every time either, and both disappear from the list once the connection attempt is over.

[Fredrik]

I'm confused about what you're trying to do, and what does or doesn't work.

Generally, I can say that to make connections easy, you need to have all three devices (PC, tablet/phone and Arduino) on the same subnet. You connect the Client on the tablet to the Workbench on the PC, [RUN] the app, then connect app on the tablet to the Arduino.

Messing around with the router is probably good only when you want to expose the Arduino to the Internet.

[jamesroodney]

Thanks for your reply!
I was just trying out the EVO app with the LED on/off example on this site, I am looking for a way to monitor my well remotely and have manual control of the pump through EVO. I do have everything on the same subnet but still get a timeout message with the EVO app. I have been able to use another arduino sketch to communicate wirelessly with the arduino so the connections are all fine, but I am unable to get any response from the arduino when I use the EVO sketch. The serial monitor shows me the correct IP, my setup is like this:

192.168.10.107 PC (wired)
|
|
192.168.10.1 Gateway (Primary Router)
WIFI Connection
{ }
} {
192.168.10.101 Tablet

192.168.10.147 DD-WRT Router (Client Bridged Mode)
|
|
192.168.10.105 Arduino Ethernet Shield

This setup works using this sketchhttp://arduinoguides.blogspot.ca/2012/05/ethernet-shield-guide-for-arduino.html. I can successfully change the state of the arduino pins by changing the URL. But I was hoping to use the existing app infrastructure that EVO has so I don't need to start from scratch...
Would there be something getting in the way of the tablet communicating with the arduino? Are there settings on the primary or secondary router that I need to change to enable the communication?

[Fredrik]

I'm afraid you may have encountered a bug in the Evothings Client's TCP plugins, which causes difficulty connecting to Arduinos. I noticed it about a week ago.

Here is an Android client I built from source just now. It has updated TCP plugins and should work better. Remove your current client, then install this.

https://evothings.com/uploads/client/EvothingsClient_1.3.0_alpha1.apk

[jamesroodney]

Thanks, I installed the new version and get a different error message now (when trying manual connect): ERR_CACHE_MISS
The arduino serial monitor still shows the correct IP.

[Fredrik]

Sorry, I have no idea what that error means. Never seen it before.

[jamesroodney]

Maybe a permissions issue? http://stackoverflow.com/questions/22301474/getting-err-cache-miss-on-window-open

[Fredrik]

I don't think so; the client has all the permissions it needs.