Hello to the community,
I have capsman RouterBOARD 3011UiAS ver 6.42.3 with 5 RBwAPG-5HacT2HnD with the same version.
on below topology (is a resturant in the beach)

the purpose of this , is to service wifi to android mobiles for tacking orders from the customers.
because the mobiles is kind of old and they dont have 5G , i give them the 2.4g for them and 5G for the customers for hotspot usage.
when a have 70 devices 25 mobiles & 45 customers , i have big delays such 980ms ping and some times time out.
Have in mind that in the square of 2500m2 we have 1000 customers . I don t aspect to service them all with wifi and that is not my priority , my priority is mobiles to take order from the customers ,
what can i do ?.
I try everythink , i post my caps man config.
caps-man channel
add band=2ghz-b/g/n control-channel-width=20mhz extension-channel=disabled \
frequency=2412 name=channel1
add band=2ghz-b/g/n control-channel-width=20mhz extension-channel=disabled \
frequency=2437 name=channel6
add band=2ghz-b/g/n control-channel-width=20mhz extension-channel=disabled \
frequency=2462 name=channel11
add band=2ghz-b/g/n control-channel-width=20mhz extension-channel=disabled \
frequency=2422 name=channel3
add band=5ghz-a/n/ac control-channel-width=20mhz extension-channel=disabled \
frequency=5180 name=CH36
add band=5ghz-a/n/ac control-channel-width=20mhz extension-channel=disabled \
frequency=5200 name=CH40
add band=5ghz-a/n/ac control-channel-width=20mhz extension-channel=disabled \
frequency=5220 name=CH44
add band=5ghz-a/n/ac control-channel-width=20mhz extension-channel=disabled \
frequency=5240 name=CH48
/caps-man datapath
add bridge=LocalLan bridge-horizon=1 name=Wifi_Customers vlan-id=10 vlan-mode=\
use-tag
add bridge=LocalLan name=PDA
/caps-man configuration
add country=greece datapath=Wifi_Customers mode=ap name=Customers_Cfg \
rates.vht-basic-mcs="" rates.vht-supported-mcs="" ssid=ssid-for-customers
/caps-man interface
add channel=CH48 configuration=Customers_Cfg configuration.rx-chains=0,1,2 \
configuration.tx-chains=0,1,2 disabled=no l2mtu=1600 mac-address=\
access-point-no3 master-interface=none name=Bar-5G radio-mac=\
access-point-no3
add channel=CH36 configuration=Customers_Cfg configuration.rx-chains=0,1,2 \
configuration.tx-chains=0,1,2 disabled=no l2mtu=1600 mac-address=\
access-point-no5 master-interface=none name=FAV-5G radio-mac=\
access-point-no5
add channel=CH40 configuration=Customers_Cfg disabled=no l2mtu=1600 \
mac-address=access-point-no1 master-interface=none name=Office-5G \
radio-mac=access-point-no1
add channel=CH44 configuration=Customers_Cfg disabled=no l2mtu=1600 \
mac-address=access-point-no2 master-interface=none name=Rest-5G radio-mac=\
access-point-no2
add channel=CH36 configuration=Customers_Cfg disabled=no l2mtu=1600 \
mac-address=access-point-no4 master-interface=none name=Water-5G \
radio-mac=access-point-no4
/caps-man security
add authentication-types=wpa-psk,wpa2-psk encryption=aes-ccm,tkip \
group-encryption=tkip group-key-update=5m name=PDA passphrase=*********
/caps-man configuration
add channel.control-channel-width=20mhz country=greece datapath=PDA \
datapath.bridge-horizon=1 hide-ssid=no mode=ap name=PDA-Cfg security=PDA \
ssid=PDA
/caps-man interface
add channel=channel1 channel.tx-power=18 configuration=PDA-Cfg \
configuration.rx-chains=0,1 configuration.tx-chains=0,1 disabled=no l2mtu=\
1600 mac-address=access-point-no3 master-interface=none name=Bar-PDA-2.4G \
radio-mac=access-point-no3
add channel=channel11 configuration=PDA-Cfg configuration.distance=indoors \
configuration.rx-chains=0,1 configuration.tx-chains=0,1 disabled=no l2mtu=\
1600 mac-address=access-point-no5 master-interface=none name=FAV-PDA-2.4G \
radio-mac=access-point-no5
add channel=channel1 channel.tx-power=18 configuration=PDA-Cfg disabled=no \
l2mtu=1600 mac-address=access-point-no1 master-interface=none name=\
Office-PDA-2.4G radio-mac=access-point-no1
add channel=channel6 configuration=PDA-Cfg disabled=no l2mtu=1600 mac-address=\
access-point-no2 master-interface=none name=Rest-PDA-2.4G radio-mac=\
access-point-no2
add channel=channel6 channel.tx-power=15 configuration=PDA-Cfg disabled=no \
l2mtu=1600 mac-address=access-point-no4 master-interface=none name=\
Water-PDA-2.4G radio-mac=access-point-no4
this is 3011 cpu graph.

Any ideas - suggestions ?
Thanks for your time!!