Dietpi: WiFi HotSpot Issue [dhcpd: receive_packet failed on wlan0: Network is down]

[UnrealEngineer]

Creating a bug report/issue:

Required Information:

• DietPi Version | _v6.8_
• SBC Device | _RPi 3 Model B+ (armv7l)_
• Power supply | _5V, 2.4A_
• SD card | _Transcend 8GB_
• Distro | _Linux DietPi 4.14.34-v7+ 1110 SMP Mon Apr 16 15:18:51 BST 2018 armv7l GNU/Linux_

Expected behaviour:

Stable WiFi AP Network

Actual behaviour:

WiFi device gets IP from DHCP but then:
_isc-dhcp-server fails: receive_packet failed on wlan0: Network is down_
No ping from 192.168.42.1 to 192.168.42.11:
_From 192.168.42.1 icmp_seq=1 Destination Host Unreachable_

Steps to reproduce:

• install WiFi HotSpot software from dietpi-software
• enable & config WiFi from dietpi-config
• connect device to DietPi WiFi AP

Did you submit a dietpi-bugreport?

no

Extra details:

isc-dhcp-server logs:

May 31 11:03:22 DietPi systemd[1]: Starting LSB: DHCP server...
May 31 11:03:22 DietPi isc-dhcp-server[14402]: DHCPv4 interfaces are no longer set by the INTERFACES variable in
May 31 11:03:22 DietPi isc-dhcp-server[14402]: /etc/default/isc-dhcp-server.  Please use INTERFACESv4 instead.
May 31 11:03:22 DietPi isc-dhcp-server[14402]: Migrating automatically for now, but this will go away in the future.
May 31 11:03:22 DietPi isc-dhcp-server[14402]: Launching IPv4 server only.
May 31 11:03:22 DietPi dhcpd[14416]: Internet Systems Consortium DHCP Server 4.3.5
May 31 11:03:22 DietPi dhcpd[14416]: Copyright 2004-2016 Internet Systems Consortium.
May 31 11:03:22 DietPi dhcpd[14416]: All rights reserved.
May 31 11:03:22 DietPi dhcpd[14416]: For info, please visit https://www.isc.org/software/dhcp/
May 31 11:03:22 DietPi dhcpd[14416]: Wrote 2 leases to leases file.
May 31 11:03:22 DietPi dhcpd[14419]: Server starting service.
May 31 11:03:24 DietPi isc-dhcp-server[14402]: Starting ISC DHCPv4 server: dhcpd.
May 31 11:03:24 DietPi systemd[1]: Started LSB: DHCP server.
May 31 11:03:27 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:03:50 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:04:12 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:04:35 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:04:58 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:05:16 DietPi dhcpd[14419]: DHCPDISCOVER from 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:05:17 DietPi dhcpd[14419]: DHCPOFFER on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:05:17 DietPi dhcpd[14419]: DHCPREQUEST for 192.168.42.11 (192.168.42.1) from 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:05:17 DietPi dhcpd[14419]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:05:20 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:05:43 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:06:06 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:06:29 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:06:51 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:07:14 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:07:37 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:07:59 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:08:22 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:08:45 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:09:08 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:09:30 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:09:40 DietPi dhcpd[14419]: DHCPREQUEST for 192.168.42.11 from 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:09:40 DietPi dhcpd[14419]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:09:51 DietPi dhcpd[14419]: reuse_lease: lease age 11 (secs) under 25% threshold, reply with unaltered, existing lease for 192.168.42.11
May 31 11:09:51 DietPi dhcpd[14419]: DHCPREQUEST for 192.168.42.11 from 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:09:51 DietPi dhcpd[14419]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:09:53 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:10:16 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:10:33 DietPi dhcpd[14419]: reuse_lease: lease age 53 (secs) under 25% threshold, reply with unaltered, existing lease for 192.168.42.11
May 31 11:10:33 DietPi dhcpd[14419]: DHCPREQUEST for 192.168.42.11 from 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:10:33 DietPi dhcpd[14419]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:10:38 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:11:01 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down
May 31 11:11:13 DietPi dhcpd[14419]: reuse_lease: lease age 93 (secs) under 25% threshold, reply with unaltered, existing lease for 192.168.42.11
May 31 11:11:13 DietPi dhcpd[14419]: DHCPREQUEST for 192.168.42.11 from 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:11:13 DietPi dhcpd[14419]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:11:22 DietPi dhcpd[14419]: reuse_lease: lease age 102 (secs) under 25% threshold, reply with unaltered, existing lease for 192.168.42.11
May 31 11:11:22 DietPi dhcpd[14419]: DHCPREQUEST for 192.168.42.11 from 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:11:22 DietPi dhcpd[14419]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
May 31 11:11:24 DietPi dhcpd[14419]: receive_packet failed on wlan0: Network is down

root@DietPi:~# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.10.10.215  netmask 255.255.255.0  broadcast 10.10.10.255
        ether b8:27:eb:68:8f:d7  txqueuelen 1000  (Ethernet)
        RX packets 1883  bytes 295031 (288.1 KiB)
        RX errors 0  dropped 2  overruns 0  frame 0
        TX packets 710  bytes 99249 (96.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 83681  bytes 18481599 (17.6 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 83681  bytes 18481599 (17.6 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.42.1  netmask 255.255.255.0  broadcast 192.168.42.255
        ether b8:27:eb:3d:da:82  txqueuelen 1000  (Ethernet)
        RX packets 568  bytes 56463 (55.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 824  bytes 80387 (78.5 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

root@DietPi:~# iwconfig
wlan0     IEEE 802.11  Mode:Master  Tx-Power=31 dBm
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

lo        no wireless extensions.

eth0      no wireless extensions.

root@DietPi:~# iw wlan0 info
Interface wlan0
        ifindex 3
        wdev 0x1
        addr b8:27:eb:3d:da:82
        type AP
        wiphy 0
        channel 1 (2412 MHz), width: 20 MHz, center1: 2412 MHz

config files:

root@DietPi:~# cat /etc/network/interfaces
#/etc/network/interfaces
#Please use DietPi-Config to modify network settings.

# Local
auto lo
iface lo inet loopback

# Ethernet
allow-hotplug eth0
iface eth0 inet static
address 10.10.10.215
netmask 255.255.255.0
gateway 10.10.10.1
dns-nameservers 10.10.10.1

# Wifi
allow-hotplug wlan0
iface wlan0 inet static
address 192.168.42.1
netmask 255.255.255.0
#gateway 192.168.0.1
wireless-power off
#dns-nameservers 8.8.8.8 8.8.4.4

# IP tables
up iptables-restore < /etc/iptables.ipv4.nat
-------------------------------------------------------------------------------------------------------------------

root@DietPi:~# cat /etc/dhcp/dhcpd.conf
ddns-update-style none;
default-lease-time 600;
max-lease-time 7200;
authoritative;
log-facility local7;

subnet 192.168.42.0 netmask 255.255.255.0 {
        range 192.168.42.10 192.168.42.50;
        option broadcast-address 192.168.42.255;
        option routers 192.168.42.1;
        option domain-name "local";
        option domain-name-servers 8.8.8.8, 8.8.4.4;
}
-------------------------------------------------------------------------------------------------------------------

root@DietPi:~# cat /etc/hostapd/hostapd.conf
interface=wlan0
driver=nl80211
ssid=DietPi
hw_mode=g
channel=1
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=DietPi
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
ieee80211n=1
-------------------------------------------------------------------------------------------------------------------

root@DietPi:~# cat /etc/iptables.ipv4.nat
# Generated by iptables-save v1.6.0 on Thu May 31 10:06:09 2018
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A FORWARD -i eth0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -i wlan0 -o eth0 -j ACCEPT
COMMIT
# Completed on Thu May 31 10:06:09 2018
# Generated by iptables-save v1.6.0 on Thu May 31 10:06:09 2018
*nat
:PREROUTING ACCEPT [0:0]
:INPUT ACCEPT [0:0]
:OUTPUT ACCEPT [2:1038]
:POSTROUTING ACCEPT [2:1038]
-A POSTROUTING -o eth0 -j MASQUERADE
COMMIT
# Completed on Thu May 31 10:06:09 2018

[Fourdee]

@UnrealEngineer

Thanks for the report 👍

Onboard WiFi, or, USB?

If USB WiFi, please paste results:

Also, may provide us some additional info, please paste results:

dmesg | grep wlan

[UnrealEngineer]

@Fourdee
I use onboard WiFi.
dmesg | grep wlan returns nothing.

[Fourdee]

Tests RPi 3B+

• 🈯️ WiFi HotSpot

root@DietPi:~# systemctl status isc-dhcp-server.service -l
● isc-dhcp-server.service - LSB: DHCP server
   Loaded: loaded (/etc/init.d/isc-dhcp-server; generated; vendor preset: enable
d)
   Active: active (running) since Sun 2018-06-03 02:03:28 BST; 19min
-------------------
Jun 03 02:03:28 DietPi systemd[1]: Started LSB: DHCP server.
Jun 03 02:21:58 DietPi dhcpd[5410]: DHCPDISCOVER from 00:ec:0a:ce:2b:76 via wlan
0
Jun 03 02:21:59 DietPi dhcpd[5410]: DHCPOFFER on 192.168.42.10 to 00:ec:0a:ce:2b
:76 (RedmiNote4-486/100DX) via wlan0
Jun 03 02:21:59 DietPi dhcpd[5410]: DHCPREQUEST for 192.168.42.10 (192.168.42.1)
 from 00:ec:0a:ce:2b:76 (RedmiNote4-486/100DX) via wlan0
Jun 03 02:21:59 DietPi dhcpd[5410]: DHCPACK on 192.168.42.10 to 00:ec:0a:ce:2b:7
6 (RedmiNote4-486/100DX) via wlan0

• dietpi-config adjust settings
  -- 🈴 Issue with enable/disable button 🈯️ (https://github.com/Fourdee/DietPi/commit/d0c53991ad55002c9d09f30998aab3ce6b1b9f9a)
• 🈯️ WiFi+Tor Hotspot (WiFi hotspot is a auto pre-req to Tor install, should not make any difference) (https://github.com/Fourdee/DietPi/issues/1692#issuecomment-379542526) | Tested fine.

[Fourdee]

@UnrealEngineer

There was a minor issue with dietpi-config, however, this won't be the cause of issue. Aside from that, all your config settings and output values match my test system.

Can you please confirm:

• RPi3B+ is the board used?
• PSU brand/make/model

Please paste the results of the following:

dmesg | grep brcm
ifdown wlan0
ifup wlan0

[UnrealEngineer]

Sorry for waiting. Have no access to internet.
I am using Raspberry Pi 3 Model B+ with Grand-X CH-45 5V 2.4A 2USB PSU
I have made some measurements of power consumption during WiFi device connection: U = 5.05-5.08 V, I = 0.80-0.86 A.

Jun 04 08:25:25 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:25:32 DietPi dhcpd[1063]: DHCPDISCOVER from 12:81:2a:cf:78:e0 via wlan0
Jun 04 08:25:33 DietPi dhcpd[1063]: DHCPOFFER on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:25:34 DietPi dhcpd[1063]: DHCPREQUEST for 192.168.42.11 (192.168.42.1) from 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:25:34 DietPi dhcpd[1063]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:25:42 DietPi dhcpd[1063]: reuse_lease: lease age 9 (secs) under 25% threshold, reply with unaltered, existing lease for 192.168.42.11
Jun 04 08:25:42 DietPi dhcpd[1063]: DHCPREQUEST for 192.168.42.11 from 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:25:42 DietPi dhcpd[1063]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:25:48 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:26:10 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:26:33 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:26:56 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:27:19 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:27:41 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:28:04 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:28:27 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:28:49 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:29:12 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:29:35 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:29:40 DietPi dhcpd[1063]: DHCPREQUEST for 192.168.42.11 from 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:29:40 DietPi dhcpd[1063]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:29:45 DietPi dhcpd[1063]: reuse_lease: lease age 5 (secs) under 25% threshold, reply with unaltered, existing lease for 192.168.42.11
Jun 04 08:29:45 DietPi dhcpd[1063]: DHCPREQUEST for 192.168.42.11 from 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:29:45 DietPi dhcpd[1063]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:29:57 DietPi dhcpd[1063]: reuse_lease: lease age 17 (secs) under 25% threshold, reply with unaltered, existing lease for 192.168.42.11
Jun 04 08:29:57 DietPi dhcpd[1063]: DHCPREQUEST for 192.168.42.11 from 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:29:57 DietPi dhcpd[1063]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:29:57 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:30:20 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down
Jun 04 08:30:39 DietPi dhcpd[1063]: reuse_lease: lease age 59 (secs) under 25% threshold, reply with unaltered, existing lease for 192.168.42.11
Jun 04 08:30:39 DietPi dhcpd[1063]: DHCPREQUEST for 192.168.42.11 from 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:30:39 DietPi dhcpd[1063]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:30:43 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down

root@DietPi:~# dmesg | grep brcm
[    3.394448] brcmfmac: F1 signature read @0x18000000=0x15264345
[    3.403949] brcmfmac: brcmf_fw_map_chip_to_name: using brcm/brcmfmac43455-sdio.bin for chip 0x004345(17221) rev 0x000006
[    3.404789] usbcore: registered new interface driver brcmfmac
[    3.715153] brcmfmac: brcmf_c_preinit_dcmds: Firmware version = wl0: Feb 27 2018 03:15:32 version 7.45.154 (r684107 CY) FWID 01-4fbe0b04
[    3.715834] brcmfmac: brcmf_c_preinit_dcmds: CLM version = API: 12.2 Data: 9.10.105 Compiler: 1.29.4 ClmImport: 1.36.3 Creation: 2018-03-09 18:56:28
[    4.077173] brcmfmac: power management disabled
[    4.225743] brcmfmac: power management disabled
[   15.449119] brcmfmac: power management disabled

root@DietPi:~# ifdown wlan0
root@DietPi:~# ifup wlan0
ifup: interface wlan0 already configured

By the way WiFi working fine in standard mode. It connects to my local router, gets access to internet and has stable connection.

[Fourdee]

@UnrealEngineer

Thanks 👍

Very strange.

Ok, so everything appears to be functional, until the OrangePi obtains an IP address, then something is causing the wlan0 adapter to fail (OPi sending invalid packets, repeated DHCP requests, causing the failure?).

Jun 04 08:25:32 DietPi dhcpd[1063]: DHCPDISCOVER from 12:81:2a:cf:78:e0 via wlan0
Jun 04 08:25:33 DietPi dhcpd[1063]: DHCPOFFER on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:25:34 DietPi dhcpd[1063]: DHCPREQUEST for 192.168.42.11 (192.168.42.1) from 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:25:34 DietPi dhcpd[1063]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:25:42 DietPi dhcpd[1063]: reuse_lease: lease age 9 (secs) under 25% threshold, reply with unaltered, existing lease for 192.168.42.11
Jun 04 08:25:42 DietPi dhcpd[1063]: DHCPREQUEST for 192.168.42.11 from 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:25:42 DietPi dhcpd[1063]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:25:48 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down

• We need to check hostapd for status/errors when receive_packet failed on wlan0: Network is down is reported
  -- systemctl status hostapd -l
• Also, does the issue occur with a different device connected to hotspot, and, OrangePi disabled (eg: smartphone which I used in my local testing)?

[UnrealEngineer]

Such situation with all WiFi devices: OPi, smartphone, laptop and ESP8266 chip.

isc-dhcp-server.service
Jun 05 07:59:33 DietPi dhcpd[1083]: receive_packet failed on wlan0: Network is down
Jun 05 07:59:56 DietPi dhcpd[1083]: receive_packet failed on wlan0: Network is down
Jun 05 08:00:03 DietPi dhcpd[1083]: DHCPDISCOVER from 12:81:2a:cf:78:e0 via wlan0
Jun 05 08:00:04 DietPi dhcpd[1083]: DHCPOFFER on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 05 08:00:04 DietPi dhcpd[1083]: Wrote 2 leases to leases file.
Jun 05 08:00:04 DietPi dhcpd[1083]: DHCPREQUEST for 192.168.42.11 (192.168.42.1) from 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 05 08:00:04 DietPi dhcpd[1083]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 05 08:00:18 DietPi dhcpd[1083]: receive_packet failed on wlan0: Network is down
Jun 05 08:00:41 DietPi dhcpd[1083]: receive_packet failed on wlan0: Network is down

hostapd.service
Jun 05 07:59:21 DietPi hostapd[12591]: Starting advanced IEEE 802.11 management: hostapd.
Jun 05 07:59:21 DietPi systemd[1]: Started LSB: Advanced IEEE 802.11 management daemon.
Jun 05 08:00:03 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: associated
Jun 05 08:00:03 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 RADIUS: starting accounting session E4C67DC0-00000000
Jun 05 08:00:03 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 WPA: pairwise key handshake completed (RSN)
Jun 05 08:00:18 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: disassociated
Jun 05 08:00:18 DietPi hostapd[12596]: wlan0: STA c9:03:da:07:c9:03 IEEE 802.11: disassociated
Jun 05 08:00:31 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: disassociated
Jun 05 08:00:33 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: associated
Jun 05 08:00:33 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 RADIUS: starting accounting session E4C67DC0-00000001
Jun 05 08:00:33 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 WPA: pairwise key handshake completed (RSN)
Jun 05 08:00:40 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: disassociated
Jun 05 08:00:41 DietPi hostapd[12596]: wlan0: STA e3:01:e3:01:e3:01 IEEE 802.11: disassociated
Jun 05 08:00:52 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: disassociated
Jun 05 08:00:54 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: associated
Jun 05 08:00:54 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 RADIUS: starting accounting session E4C67DC0-00000002
Jun 05 08:00:54 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 WPA: pairwise key handshake completed (RSN)
Jun 05 08:01:03 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: disassociated
Jun 05 08:01:04 DietPi hostapd[12596]: wlan0: STA e1:01:e1:01:e0:01 IEEE 802.11: disassociated
Jun 05 08:01:06 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: disassociated
Jun 05 08:01:08 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: associated
Jun 05 08:01:08 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 RADIUS: starting accounting session E4C67DC0-00000003
Jun 05 08:01:08 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 WPA: pairwise key handshake completed (RSN)
Jun 05 08:01:26 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: disassociated
Jun 05 08:01:26 DietPi hostapd[12596]: wlan0: STA d0:03:f5:c7:d0:03 IEEE 802.11: disassociated
Jun 05 08:01:44 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: disassociated
Jun 05 08:01:46 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: associated
Jun 05 08:01:46 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 RADIUS: starting accounting session E4C67DC0-00000004
Jun 05 08:01:46 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 WPA: pairwise key handshake completed (RSN)
Jun 05 08:01:49 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: disassociated
Jun 05 08:01:49 DietPi hostapd[12596]: wlan0: STA e3:01:e3:01:e3:01 IEEE 802.11: disassociated

[Fourdee]

@UnrealEngineer

OrangePi device seems to be the trigger, power off the OrangePi and see if the issue reoccurs:

Jun 05 08:00:03 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: associated
Jun 05 08:00:03 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 RADIUS: starting accounting session E4C67DC0-00000000
Jun 05 08:00:03 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 WPA: pairwise key handshake completed (RSN)
Jun 05 08:00:18 DietPi hostapd[12596]: wlan0: STA 12:81:2a:cf:78:e0 IEEE 802.11: disassociated

---

Jun 04 08:25:42 DietPi dhcpd[1063]: DHCPACK on 192.168.42.11 to 12:81:2a:cf:78:e0 (orangepi) via wlan0
Jun 04 08:25:48 DietPi dhcpd[1063]: receive_packet failed on wlan0: Network is down

[UnrealEngineer]

Logs after reboot. OrangePi and other devices disconnected. Than I connected by smartphone and situations was the same.

root@DietPi:~# journalctl -f -n 100 -u hostapd.service
-- Logs begin at Wed 2018-06-06 14:03:41 EEST. --
Jun 06 14:04:05 DietPi systemd[1]: Starting LSB: Advanced IEEE 802.11 management daemon...
Jun 06 14:04:06 DietPi hostapd[1197]: Starting advanced IEEE 802.11 management: hostapd.
Jun 06 14:04:06 DietPi systemd[1]: Started LSB: Advanced IEEE 802.11 management daemon.
Jun 06 14:15:01 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: associated
Jun 06 14:15:01 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b RADIUS: starting accounting session D69407       8A-00000000
Jun 06 14:15:01 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b WPA: pairwise key handshake completed (RSN       )
Jun 06 14:15:02 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:15:02 DietPi hostapd[1226]: wlan0: STA c9:03:d7:a7:c9:03 IEEE 802.11: disassociated
Jun 06 14:15:06 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:15:07 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:15:13 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: associated
Jun 06 14:15:13 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b RADIUS: starting accounting session D69407       8A-00000001
Jun 06 14:15:13 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b WPA: pairwise key handshake completed (RSN       )
Jun 06 14:15:25 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:15:25 DietPi hostapd[1226]: wlan0: STA e3:01:e3:01:e3:01 IEEE 802.11: disassociated
Jun 06 14:15:36 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:15:36 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:15:36 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:15:39 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: associated
Jun 06 14:15:39 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b RADIUS: starting accounting session D69407       8A-00000002
Jun 06 14:15:39 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b WPA: pairwise key handshake completed (RSN       )
Jun 06 14:15:47 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:15:48 DietPi hostapd[1226]: wlan0: STA e1:01:e1:01:e0:01 IEEE 802.11: disassociated
Jun 06 14:15:49 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:15:52 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: associated
Jun 06 14:15:52 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b RADIUS: starting accounting session D69407       8A-00000003
Jun 06 14:15:52 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b WPA: pairwise key handshake completed (RSN       )
Jun 06 14:16:10 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:16:10 DietPi hostapd[1226]: wlan0: STA ce:03:c6:47:ce:03 IEEE 802.11: disassociated
Jun 06 14:16:12 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:16:12 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:16:12 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:16:15 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: associated
Jun 06 14:16:15 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b RADIUS: starting accounting session D69407       8A-00000004
Jun 06 14:16:15 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b WPA: pairwise key handshake completed (RSN       )
Jun 06 14:16:33 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:16:33 DietPi hostapd[1226]: wlan0: STA e3:01:e3:01:e3:01 IEEE 802.11: disassociated
Jun 06 14:16:34 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:16:34 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:16:37 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: associated
Jun 06 14:16:37 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b RADIUS: starting accounting session D69407       8A-00000005
Jun 06 14:16:37 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b WPA: pairwise key handshake completed (RSN       )
Jun 06 14:16:41 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated
Jun 06 14:16:41 DietPi hostapd[1226]: wlan0: STA 10:2a:b3:7f:0f:0b IEEE 802.11: disassociated


root@DietPi:~# journalctl -f -n 100 -u isc-dhcp-server.service
-- Logs begin at Wed 2018-06-06 14:03:41 EEST. --
Jun 06 14:03:50 DietPi systemd[1]: Starting LSB: DHCP server...
Jun 06 14:03:51 DietPi isc-dhcp-server[1041]: DHCPv4 interfaces are no longer set by the INTERFACES variable        in
Jun 06 14:03:51 DietPi isc-dhcp-server[1041]: /etc/default/isc-dhcp-server.  Please use INTERFACESv4 instead.
Jun 06 14:03:51 DietPi isc-dhcp-server[1041]: Migrating automatically for now, but this will go away in the f       uture.
Jun 06 14:03:51 DietPi isc-dhcp-server[1041]: Launching IPv4 server only.
Jun 06 14:03:51 DietPi dhcpd[1057]: Internet Systems Consortium DHCP Server 4.3.5
Jun 06 14:03:51 DietPi dhcpd[1057]: Copyright 2004-2016 Internet Systems Consortium.
Jun 06 14:03:51 DietPi dhcpd[1057]: All rights reserved.
Jun 06 14:03:51 DietPi dhcpd[1057]: For info, please visit https://www.isc.org/software/dhcp/
Jun 06 14:03:51 DietPi dhcpd[1057]: Wrote 2 leases to leases file.
Jun 06 14:03:52 DietPi dhcpd[1066]: Server starting service.
Jun 06 14:03:54 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:03:54 DietPi isc-dhcp-server[1041]: Starting ISC DHCPv4 server: dhcpd.
Jun 06 14:03:54 DietPi systemd[1]: Started LSB: DHCP server.
Jun 06 14:04:27 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:04:49 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:05:12 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:05:35 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:05:57 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:06:20 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:06:43 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:07:06 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:07:28 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:07:51 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:08:14 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:08:36 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:08:59 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:09:22 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:09:44 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:10:07 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:10:30 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:10:53 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:11:15 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:11:38 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:12:01 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:12:23 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:12:46 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:13:09 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:13:31 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:13:54 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:14:17 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:14:40 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:15:01 DietPi dhcpd[1066]: DHCPDISCOVER from 10:2a:b3:7f:0f:0b via wlan0
Jun 06 14:15:02 DietPi dhcpd[1066]: DHCPOFFER on 192.168.42.12 to 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan       0
Jun 06 14:15:02 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:15:13 DietPi dhcpd[1066]: DHCPDISCOVER from 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan0
Jun 06 14:15:13 DietPi dhcpd[1066]: DHCPOFFER on 192.168.42.12 to 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan       0
Jun 06 14:15:13 DietPi dhcpd[1066]: DHCPREQUEST for 192.168.42.12 (192.168.42.1) from 10:2a:b3:7f:0f:0b (Redm       iNote3-XRP) via wlan0
Jun 06 14:15:13 DietPi dhcpd[1066]: DHCPACK on 192.168.42.12 to 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan0
Jun 06 14:15:25 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:15:40 DietPi dhcpd[1066]: reuse_lease: lease age 27 (secs) under 25% threshold, reply with unaltere       d, existing lease for 192.168.42.12
Jun 06 14:15:40 DietPi dhcpd[1066]: DHCPDISCOVER from 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan0
Jun 06 14:15:40 DietPi dhcpd[1066]: DHCPOFFER on 192.168.42.12 to 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan       0
Jun 06 14:15:40 DietPi dhcpd[1066]: reuse_lease: lease age 27 (secs) under 25% threshold, reply with unaltere       d, existing lease for 192.168.42.12
Jun 06 14:15:40 DietPi dhcpd[1066]: DHCPREQUEST for 192.168.42.12 (192.168.42.1) from 10:2a:b3:7f:0f:0b (Redm       iNote3-XRP) via wlan0
Jun 06 14:15:40 DietPi dhcpd[1066]: DHCPACK on 192.168.42.12 to 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan0
Jun 06 14:15:48 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:15:52 DietPi dhcpd[1066]: reuse_lease: lease age 39 (secs) under 25% threshold, reply with unaltere       d, existing lease for 192.168.42.12
Jun 06 14:15:52 DietPi dhcpd[1066]: DHCPDISCOVER from 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan0
Jun 06 14:15:52 DietPi dhcpd[1066]: DHCPOFFER on 192.168.42.12 to 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan       0
Jun 06 14:15:52 DietPi dhcpd[1066]: reuse_lease: lease age 39 (secs) under 25% threshold, reply with unaltere       d, existing lease for 192.168.42.12
Jun 06 14:15:52 DietPi dhcpd[1066]: DHCPREQUEST for 192.168.42.12 (192.168.42.1) from 10:2a:b3:7f:0f:0b (Redm       iNote3-XRP) via wlan0
Jun 06 14:15:52 DietPi dhcpd[1066]: DHCPACK on 192.168.42.12 to 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan0
Jun 06 14:16:10 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:16:15 DietPi dhcpd[1066]: reuse_lease: lease age 62 (secs) under 25% threshold, reply with unaltere       d, existing lease for 192.168.42.12
Jun 06 14:16:15 DietPi dhcpd[1066]: DHCPDISCOVER from 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan0
Jun 06 14:16:15 DietPi dhcpd[1066]: DHCPOFFER on 192.168.42.12 to 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan       0
Jun 06 14:16:15 DietPi dhcpd[1066]: reuse_lease: lease age 62 (secs) under 25% threshold, reply with unaltere       d, existing lease for 192.168.42.12
Jun 06 14:16:15 DietPi dhcpd[1066]: DHCPREQUEST for 192.168.42.12 (192.168.42.1) from 10:2a:b3:7f:0f:0b (Redm       iNote3-XRP) via wlan0
Jun 06 14:16:15 DietPi dhcpd[1066]: DHCPACK on 192.168.42.12 to 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan0
Jun 06 14:16:33 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:16:37 DietPi dhcpd[1066]: reuse_lease: lease age 84 (secs) under 25% threshold, reply with unaltere       d, existing lease for 192.168.42.12
Jun 06 14:16:37 DietPi dhcpd[1066]: DHCPDISCOVER from 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan0
Jun 06 14:16:37 DietPi dhcpd[1066]: DHCPOFFER on 192.168.42.12 to 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan       0
Jun 06 14:16:37 DietPi dhcpd[1066]: reuse_lease: lease age 84 (secs) under 25% threshold, reply with unaltere       d, existing lease for 192.168.42.12
Jun 06 14:16:37 DietPi dhcpd[1066]: DHCPREQUEST for 192.168.42.12 (192.168.42.1) from 10:2a:b3:7f:0f:0b (Redm       iNote3-XRP) via wlan0
Jun 06 14:16:37 DietPi dhcpd[1066]: DHCPACK on 192.168.42.12 to 10:2a:b3:7f:0f:0b (RedmiNote3-XRP) via wlan0
Jun 06 14:16:56 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:17:19 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:17:41 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:18:04 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:18:27 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:18:49 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:19:12 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:19:35 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:19:58 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:20:20 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down
Jun 06 14:20:43 DietPi dhcpd[1066]: receive_packet failed on wlan0: Network is down

[UnrealEngineer]

I've tested WiFi HotSpot with new RPi 3B+ and everything was fine! Seems it is some hardware issue with first one RPi.