How do I find out the MAC addresses of my webbricks?

Two of my four webbricks are working in the sense of processing inputs and outputs, but no longer respond to the IP addresses to which I set them.

Using Webrick Monitor I can see that they appear to have reset their IP address to 10.100.100.100, but http://10.100.100.100 gives Network Timeout.

(The power switch is before the transformer, so I can't switch individual webbricks on and off without unscrewing wires.)

Richard,

A few questions and suggestions that should help you.

1. Have you tried to ping 10.100.100.100?

2. Can you see a "NN" UDP packet being sent out in the WebBrick Monitor? This displays the MAC address.

3. A capture of network traffic with Wire Shark will tell you the MAC address straight away. Note: Use the following filter to only see packages from the WebBricks on 10.100.100.100: ip.src == 10.100.100.100

1. Pinging 10.100.100.100 gives 0 receipts out of 4.

2. WebbrickMon shows Analogue In fluctuating

3. I have run Wire Shark to get the IP address, so I tried entering the URL: http://10.100.100.100/cfg.spi?com=SA00;03;75;10;00;88;192;168;0;151:

but I get " The operation timed out when attempting to contact 10.100.100.100. "

 Just to check, I tried accessing the new IP address but I get "The operation timed out when attempting to contact 192.168.0.151."

Would resetting the webbrick do any good?

Thanks,

Richard

 Richard

  Is that an older WebBrick with the fully floating analogue in ?  if so you ought to tie down the inputs with 47K to ground, it'll make all the WebBricks perform better.  If you have a bunch of them chatting away it takes gateway load to process.

 A factory reset will not resolve your particular problem, since the WebBrick will be on the same network address (10.100.100.100) after the reset. Try the instructions in the post following this one.

Regards

Andy

 Before you reset the WebBrick, please confirm & try the following: 

 What is the IP address and the subnet mask of the PC you are trying to access the WebBrick from. If you are on an alternate network (i.e. the WebBrick is on 10.100.100.100 and you are on 192.168.1.xxx) then you will not get a route to the WebBrick, meaning you cannot access or control it. To access the WebBrick change your computers IP manually to a 10.100.100.xxx address and try again.  Or read on and follow the instructions in the last paragraph.

When you are saying: 

" Just to check, I tried accessing the new IP address but I get "The operation timed out when attempting to contact 192.168.0.151." "

Did you set the WebBrick to be on this IP address? Is the WebBrick Monitor showing that the WebBrick is on this address?

Let me briefly explain how the WebBrick Monitor sets the IP address of a WebBrick. When you type in an IP address in the WebBrick monitor and hit set, then the WebBrick monitor will wait and change the IP address of the WebBrick that next sends out an NN or AA UDP package (i.e. a package that contains the MAC address of the WebBrick).You can force a WebBrick to send out an AA package by pressing the factory reset button, whilst the WebBrick is powered up. So you are not factory resetting the WebBrick! Pressing the factory reset button whilst a WebBrick is powered up merly causes the WebBrick to send out a number of AT packages and finally an AA package. This AA package then triggers the WebBrick Monitor to change the netwrok address of the WebBrick.