RP6 ROBOT SYSTEM - 3. RobotLoader 2
3.6. Solving WLAN Connection Problems
If you experience problems with the connection to the WLAN module, this can have
various reasons. Some of these are briefly discussed here.
The most important thing: The WLAN access point must be correctly configured! If the
WLAN doesn't work with other devices, it will probably not work with the RP6-M256 as
well. The settings of the PC and of the WLAN module must equally match. If this is not
the case, the connection can't work.
If you are sure that the WLAN works correctly, you need to find out what goes wrong
with the communication to the RP6-M256.
As described above, you can switch the microcontroller into “passthrough” mode in
RobotLoader and send commands directly to the WLAN module. Then you have vari-
ous options for trouble-shooting (see Appendix B for further details). Check if the
WLAN module can connect to the access point (the yellow WL1 LED will flash if no
connection can be established with the access point). If the WLAN connection works,
the problem might come from the PC settings.
Check if the communication is blocked by a firewall!
Windows PCs normally fea-
ture at least the Microsoft firewall. At the first start of the new RobotLoader, a security
control dialog might appear as the RobotLoader wants to listen on UDP port 55555 im-
mediately after starting. That should be allowed! Of course TCP data exchange with
the WLAN module must be allowed as well, otherwise it will not work at all.
Please make also sure that the WLAN module uses an IP address that is used by no
other computer in the LAN. All computers must be in the same IP sub-network i.e.
with netmask 255.255.255.0 the first three numbers of the IP address must be the
same. This means that all IP addresses would start like this: 192.168.10.x and the
last number instead of the x can be a number between 1 and 254. If the computers
are in the subnetwork 192.168.2.x or anything similar, it is impossible to communic-
ate directly with the WLAN module if its IP is IP 192.168.10.x.
If you want to use DHCP, make sure that the DHCP server works correctly and the
DHCP mode is activated in the WLAN module.
In the appendices you will find many tips that will help you with WLAN prob-
lems.
If you didn't find your specific problem, here once again the tip from the
start:
In case of problems you can ask your questions quickly and easily per
e-mail:
You will find documentation software updates and further information
on the robot homepage:
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