Zinvol om op de printer zelf een static IP in te geven.........
Op de HP site:
Will a static IP address keep my computer from losing communication with my wireless printer?
If your computer regularly loses communication with your wireless printer, it can help to give the printer a static IP address. This address will not change over time and your computer may have an easier time finding the printer after long periods of printer inactivity.
To give your printer a static IP address:
1/ From the control panel of your printer, print a Network Configuration page and Wireless Network Test report, and write down your printer's IP address. Compare the printer's IP address to the gateway IP address. They should have a similar format (for example, the gateway IP address might be 192.168.0.1 and the printer IP address 192.168.0.5). If the printer has an IP address similar to 169.254.XXX.XXX or 0.0.0.0, it is not connected to your wireless network.
2/ Type the printer's IP address into your Internet browser's address bar, and press Return. A web page appears, displaying the printer's internal settings.
3/ Choose the Networking tab, then the Wireless tab, then the IPv4 tab (your menu path may be slightly different, depending on the model).
4/ On the page that appears, do the following:
./ Set a Manual IP. Your wireless router automatically sets an IP address within a specific range (called the DHCP range). If you know what the DHCP range is, set an IP address in which the last set of numbers is outside that range, but no higher than 254. Keep the first three sets of numbers the same. If you do not know the DHCP range, select a fairly high IP address, like 250 (again, for the last set of numbers). To learn about your router's DHCP range, contact your Internet Service Provider (ISP) or wireless router manufacturer.
./ For the subnet address, use 255.255.255.0, unless you know that it is different, in which case you should use that number.
./ For the gateway address and the first DNS, enter your router's IP (it is on the Network Configuration and Wireless Network Test reports). Leave the second DNS field blank.
5/ Click Apply. The screen will not refresh. If you changed the printer's IP address from what you typed into your Internet browser, you will have to type in the new IP address to access the printer. If you did not change your printer's IP address, wait 30 seconds after clicking Apply, and then click the Refresh button in your browser. Print another Network Configuration page from your printer to verify its IP address is what you assigned.
6/ Turn off both the wireless router and printer.
7/ Restart the wireless router.
8/ After the wireless router restarts, restart the printer.
If you changed your printer's IP address in step 4, then there may be an additional step needed, depending on your printer model (and only for Windows users):
Windows XP, Windows Vista or Windows 7:
Start -> Programs -> HP -> {your printer model} -> Update IP Address.
Windows 8:
Launch the Printer Software from the Start screen (icon for the printer model name) or from the tile named for your printer.
Select (click or touch) Utilities on the top of the Printer Software screen
Select Update IP Address
If this entry exists, click it and enter the new IP Address that you entered in step 4.