TP-Link ARCHER MR200 User Manual page 93

2 ) If you cannot find the PIN or PIN failed, you may choose
a security key
Password;
3 ) If it continues saying network security key mismatch, it is suggested to confirm
the wireless password on your wireless router/modem;
Note: Wireless password/Network Security Key is case-sensitive.
4 ) Connect to wireless network.
2 Windows was unable to connect to XXXX /Cannot join this network/Taking longer
than usual to connect to this network.
instead, and then type in the Network Security Key/Wireless
Connecting using
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