If you continue to have unexplained data communication issues while using WeatherLink IP, you might want to consider swapping your datalogger for an USB or SERIAL version, provided you also decide to leave your computer on 24/7. Myself and others here have seen intermittent data communications troubles on WL IP and I for one, had them solved by switching dataloggers.
Another unintended benefit I find is my various weather software "feels" snappier and more responsive while communicating directly with the console on a COM port vs over my LAN, using TCP/IP.
Depends on his computer.. the IP goes directly to the modem. IT might be his logger. I had one go bad like that and I had another logger for some reason and swapped it out. New computers do not necessarily have the empty PCI slots for the time proved serial version, and the USB drivers are iffy and old at best.
I have a vista 64 bit and wanted to go serial , swap out my aging xp system as a backup and do some other things. Anyway, I ordered a serial board for about 9 bucks and when I opened the case, no pci port. It had one and that was for a video card. So I ordered the serial to USB connector and the driver was bad, so I did track down the manufacturer and I think it will work.
However, considering the expense of the datalogger, I would not run weatherlink at the same time the IP logger is working. IF that doesn't stop the problem, then... it is really time to call Davis directly, explain what has been done and maybe they might switch out his logger. He will also need to get Davis to switch over his sent data on the old one to his new address.
I really think it is his weatherlink software running at the same time. IF it is the logger, he needs to have Davis honor the agreement and send him a new one in exchange for the crappy one.
I have a IP one right now. It goes directly into one of the ethernet ports on my modem, not through a router or switch, and I am not having any problems. However, if I have WL running, then yes, the data isn't uploaded.
One other thing... if for some reason you lose power to your modem, the IP address changes that your IP logger uses, so if you are trying to find it with Wlink, you need to find what the new address is. It shouldn't make any difference with the Davis site end , but with your home system, yup.