Hi Karl,
thank you for your suggestion. Certainly - I live in a quite "crowded" environemnt and there are 9-12 several networks in the vacinity.
Nevertheless I have tons of devices here that use my wlan and none of them has such a problem.
An example of a ping to my Rasperry:
64 bytes from 192.168.1.51: icmp_seq=11 ttl=64 time=176.166 ms
64 bytes from 192.168.1.51: icmp_seq=12 ttl=64 time=245.488 ms
64 bytes from 192.168.1.51: icmp_seq=13 ttl=64 time=309.008 ms
64 bytes from 192.168.1.51: icmp_seq=14 ttl=64 time=20.172 ms
64 bytes from 192.168.1.51: icmp_seq=15 ttl=64 time=75.049 ms
64 bytes from 192.168.1.51: icmp_seq=16 ttl=64 time=64.916 ms
Request timeout for icmp_seq 17
64 bytes from 192.168.1.51: icmp_seq=18 ttl=64 time=203.427 ms
64 bytes from 192.168.1.51: icmp_seq=19 ttl=64 time=973.195 ms
64 bytes from 192.168.1.51: icmp_seq=20 ttl=64 time=430.523 ms
64 bytes from 192.168.1.51: icmp_seq=21 ttl=64 time=320.801 ms
Request timeout for icmp_seq 22
64 bytes from 192.168.1.51: icmp_seq=22 ttl=64 time=1091.365 ms
64 bytes from 192.168.1.51: icmp_seq=23 ttl=64 time=441.492 ms
64 bytes from 192.168.1.51: icmp_seq=25 ttl=64 time=223.716 ms
Request timeout for icmp_seq 26
Request timeout for icmp_seq 27
Request timeout for icmp_seq 28
Request timeout for icmp_seq 29
Request timeout for icmp_seq 30
Request timeout for icmp_seq 31
64 bytes from 192.168.1.51: icmp_seq=26 ttl=64 time=6049.074 ms
Request timeout for icmp_seq 33
Request timeout for icmp_seq 34
Request timeout for icmp_seq 35
Request timeout for icmp_seq 36
Request timeout for icmp_seq 37
Request timeout for icmp_seq 38
Request timeout for icmp_seq 39
64 bytes from 192.168.1.51: icmp_seq=33 ttl=64 time=8002.806 ms
64 bytes from 192.168.1.51: icmp_seq=34 ttl=64 time=7025.699 ms
64 bytes from 192.168.1.51: icmp_seq=35 ttl=64 time=6051.583 ms
64 bytes from 192.168.1.51: icmp_seq=36 ttl=64 time=5053.647 ms
64 bytes from 192.168.1.51: icmp_seq=37 ttl=64 time=4053.952 ms
64 bytes from 192.168.1.51: icmp_seq=38 ttl=64 time=3055.519 ms
Using the ethernet port, I get responses constantly with about 0.4 ms response time with no interruption.
I am still waiting for my second raspi3 so lets wait how that goes.
Cheers
Wilhelm