sudo chmod a-x /usr/local/Repetier-Setup/bin/wlanscanner
pi@Repetier-Server:~ $ tail -f /var/log/syslog
May 19 18:08:54 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:09:57 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:11:00 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:12:01 Repetier-Server dhcpcd[642]: wlan0: new hardware address: 0a:a5:0e:46:74:36
May 19 18:12:01 Repetier-Server kernel: [12362.536734] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
May 19 18:12:01 Repetier-Server kernel: [12362.536795] brcmfmac: power management disabled
May 19 18:12:01 Repetier-Server NetworkManager[373]: <info>  [1558289521.0179] device (wlan0): set-hw-addr: set MAC address to 0A:A5:0E:46:74:36 (scanning)
May 19 18:12:01 Repetier-Server NetworkManager[373]: <info>  [1558289521.0251] device (wlan0): supplicant interface state: inactive -> disconnected
May 19 18:12:01 Repetier-Server NetworkManager[373]: <info>  [1558289521.0291] device (wlan0): supplicant interface state: disconnected -> inactive
May 19 18:12:01 Repetier-Server wpa_supplicant[456]: wlan0: Reject scan trigger since one is already pending
May 19 18:14:10 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:15:13 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:16:12 Repetier-Server dhcpcd[642]: eth0: adding default route via 192.168.0.1
May 19 18:16:16 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:16:49 Repetier-Server dhcpcd[642]: eth0: Router Advertisement from fe80::ee43:f6ff:fe03:da38
May 19 18:16:49 Repetier-Server dhcpcd[642]: eth0: requesting DHCPv6 information
May 19 18:17:01 Repetier-Server CRON[16985]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
May 19 18:17:17 Repetier-Server kernel: [12678.536835] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
May 19 18:17:17 Repetier-Server kernel: [12678.536852] brcmfmac: power management disabled
May 19 18:17:17 Repetier-Server dhcpcd[642]: wlan0: new hardware address: 0a:c3:7c:fe:6f:25
May 19 18:17:17 Repetier-Server NetworkManager[373]: <info>  [1558289837.0179] device (wlan0): set-hw-addr: set MAC address to 0A:C3:7C:FE:6F:25 (scanning)
May 19 18:17:17 Repetier-Server NetworkManager[373]: <info>  [1558289837.1331] device (wlan0): supplicant interface state: inactive -> disconnected
May 19 18:17:17 Repetier-Server NetworkManager[373]: <info>  [1558289837.1599] device (wlan0): supplicant interface state: disconnected -> inactive
May 19 18:17:17 Repetier-Server wpa_supplicant[456]: wlan0: Reject scan trigger since one is already pending
May 19 18:19:26 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:20:29 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:21:32 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:22:33 Repetier-Server dhcpcd[642]: wlan0: new hardware address: 42:92:0a:7b:00:89
May 19 18:22:33 Repetier-Server kernel: [12994.536885] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
May 19 18:22:33 Repetier-Server kernel: [12994.536900] brcmfmac: power management disabled
May 19 18:22:33 Repetier-Server NetworkManager[373]: <info>  [1558290153.0176] device (wlan0): set-hw-addr: set MAC address to 42:92:0A:7B:00:89 (scanning)
May 19 18:22:33 Repetier-Server NetworkManager[373]: <info>  [1558290153.1030] device (wlan0): supplicant interface state: inactive -> disconnected
May 19 18:22:33 Repetier-Server NetworkManager[373]: <info>  [1558290153.1308] device (wlan0): supplicant interface state: disconnected -> inactive
May 19 18:22:33 Repetier-Server wpa_supplicant[456]: wlan0: Reject scan trigger since one is already pending
May 19 18:24:42 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:25:45 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:26:19 Repetier-Server dhcpcd[642]: eth0: Router Advertisement from fe80::ee43:f6ff:fe03:da38
May 19 18:26:19 Repetier-Server dhcpcd[642]: eth0: requesting DHCPv6 information
May 19 18:26:48 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:27:49 Repetier-Server dhcpcd[642]: wlan0: new hardware address: 86:ac:d0:23:2f:ab
May 19 18:27:49 Repetier-Server kernel: [13310.547393] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
May 19 18:27:49 Repetier-Server kernel: [13310.547416] brcmfmac: power management disabled
May 19 18:27:49 Repetier-Server NetworkManager[373]: <info>  [1558290469.0280] device (wlan0): set-hw-addr: set MAC address to 86:AC:D0:23:2F:AB (scanning)
May 19 18:27:49 Repetier-Server NetworkManager[373]: <info>  [1558290469.0361] device (wlan0): supplicant interface state: inactive -> disconnected
May 19 18:27:49 Repetier-Server NetworkManager[373]: <info>  [1558290469.0382] device (wlan0): supplicant interface state: disconnected -> inactive
May 19 18:27:49 Repetier-Server wpa_supplicant[456]: wlan0: Reject scan trigger since one is already pending
May 19 18:29:58 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:31:01 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan
May 19 18:32:04 Repetier-Server wpa_supplicant[456]: wlan0: Failed to initiate sched scan