I did some further research on passwords. Finally I got it working with my AP using a 8 character password with upper and lower case letters and decimals. Length of 16 (same password type) didn't work.

Hi, the same thing is here. The version v0.1.10-b160 worked well with my AP (LANCOM OAP-822), but the new one (0.2.1) gets no IP address from the router and messes up the command line with messages about the WIFI (see below). Reason: the new WIFI stack has a bug using comples passwords. My omega only gets an IP address with VERY simple passwords, no special characters...

[ 21.176160] device eth0 entered promiscuous mode
[ 21.184829] br-wwan: port 1(eth0) entered forwarding state
[ 21.190475] br-wwan: port 1(eth0) entered forwarding state
[ 21.256432]
[ 21.256432] _ _____ ___ ___ _________ ___ ____
[ 21.256432] | | /| / / _ | / _ / _ \ / / __ / _ / / V1.0
[ 21.256432] | |/ |/ / __ |/ , _/ / / // // / , _/ _/
[ 21.256432] |/|// |//|// _/_//|/__/
[ 21.256432] Onion Enhanced MT7688 WiFi Driver
[ 21.256432]
[ 21.475135] DMA Scheduler Mode=0(LMAC)
[ 21.478970] efuse_probe: efuse = 10000012
[ 21.483089] 1. Phy Mode = 14
[ 21.653186] 2. Phy Mode = 14
[ 21.656191] 3. Phy Mode = 14
[ 21.659435] WTBL Segment 1 info:
[ 21.662797] MemBaseAddr/FID:0x28000/0
[ 21.666727] EntrySize/Cnt:32/128
[ 21.670175] WTBL Segment 2 info:
[ 21.673534] MemBaseAddr/FID:0x40000/0
[ 21.677435] EntrySize/Cnt:64/128
[ 21.680880] WTBL Segment 3 info:
[ 21.684237] MemBaseAddr/FID:0x42000/64
[ 21.688231] EntrySize/Cnt:64/128
[ 21.691677] WTBL Segment 4 info:
[ 21.695046] MemBaseAddr/FID:0x44000/128
[ 21.699108] EntrySize/Cnt:32/128
[ 23.184460] br-wwan: port 1(eth0) entered forwarding state
[ 27.081732] device apcli0 entered promiscuous mode
[ 27.086761] br-wwan: port 2(apcli0) entered forwarding state
[ 27.092554] br-wwan: port 2(apcli0) entered forwarding state
[ 29.084454] br-wwan: port 2(apcli0) entered forwarding state
[ 30.703050] br-wwan: port 2(apcli0) entered disabled state
[ 31.412198] br-wwan: port 2(apcli0) entered forwarding state
[ 31.418050] br-wwan: port 2(apcli0) entered forwarding state
[ 32.969380] Interface apcli0 link up! (WPA2PSK AES)
[ 33.414464] br-wwan: port 2(apcli0) entered forwarding state
[ 44.969365] Interface apcli0 link up! (WPA2PSK AES)
[ 56.969469] Interface apcli0 link up! (WPA2PSK AES)
[ 60.102393] random: nonblocking pool is initialized
[ 68.969420] Interface apcli0 link up! (WPA2PSK AES)
[ 80.969389] Interface apcli0 link up! (WPA2PSK AES)
[ 93.013466] Interface apcli0 link up! (WPA2PSK AES)
[ 105.079380] Interface apcli0 link up! (WPA2PSK AES)
[ 117.079400] Interface apcli0 link up! (WPA2PSK AES)
[ 129.079431] Interface apcli0 link up! (WPA2PSK AES)
[ 141.083322] Interface apcli0 link up! (WPA2PSK AES)
[ 153.079443] Interface apcli0 link up! (WPA2PSK AES)
[ 187.492606] br-wwan: port 2(apcli0) entered disabled state
[ 188.412198] br-wwan: port 2(apcli0) entered forwarding state
[ 188.418046] br-wwan: port 2(apcli0) entered forwarding state
[ 189.699505] Interface apcli0 link up! (WPA2PSK AES)
[ 190.414463] br-wwan: port 2(apcli0) entered forwarding state
[ 201.699412] Interface apcli0 link up! (WPA2PSK AES)
[ 213.699461] Interface apcli0 link up! (WPA2PSK AES)
[ 225.749435] Interface apcli0 link up! (WPA2PSK AES)
[ 237.759301] Interface apcli0 link up! (WPA2PSK AES)
[ 249.831561] Interface apcli0 link up! (WPA2PSK AES)
[ 261.849411] Interface apcli0 link up! (WPA2PSK AES)
[ 273.852411] Interface apcli0 link up! (WPA2PSK AES)
[ 285.849410] Interface apcli0 link up! (WPA2PSK AES)
[ 320.473434] br-wwan: port 2(apcli0) entered disabled state
[ 320.950202] br-wwan: port 2(apcli0) entered forwarding state
[ 320.956065] br-wwan: port 2(apcli0) entered forwarding state
[ 322.730637] Interface apcli0 link up! (WPA2PSK AES)
[ 322.954452] br-wwan: port 2(apcli0) entered forwarding state
[ 334.729371] Interface apcli0 link up! (WPA2PSK AES)
[ 346.729399] Interface apcli0 link up! (WPA2PSK AES)
[ 358.729378] Interface apcli0 link up! (WPA2PSK AES)
...