Unable to access Arduino Uno through Putty after modem reset.

Hi Folks,

I'm having trouble accessing my Arduino Uno and shield through 'Putty'. I originally connected and everything was going well but called it a night. When i returned a few days later my router was playing up and needed to reset. I'm now unable to access the device through Putty.

I am a novice so anyone's help would be appreciated.

I'm using the below user manual.

http://www.dragino.com/downloads/index.php?dir=LoRa_IoT_Kit/v2-Kit/

I had completed up to and including page 18 and the putty connection worked. Now after resetting my modem i receive "Network Error: Connection timed out".

From what i can understand (google) the IP address within the device has changed and i don't know what it is to access.

I have tried a few different URLs without success. I have also connected to a different PC on the same network and still no success.

Heelllpppp! Thanks.