I have one net WNDR3700v4 and r6100
I followed the guide from openwrt(https://wiki.openwrt.org/doc/howto/hardware.button) to create a file /etc/hotplug.d/button/buttons found:
R6100 run logread -e button -f:
Mon May 15 01:49:05 2017 user.notice root: the button was rfkill and the action was released
Mon May 15 01:49:06 2017 user.notice root: the button was rfkill and the action was pressed
WNDR3700v4 run logread -e button -f:
Mon May 15 01:52:59 2017 user.notice root: the button was rfkill and the action was pressed
Mon May 15 01:53:00 2017 user.notice root: the button was rfkill and the action was released
in R6100 Wifi Toggle button is not "Toggle",then just restart
here is the log:
Mon May 15 01:49:05 2017 user.notice root: the button was rfkill and the action was released
Mon May 15 01:49:06 2017 daemon.notice hostapd: wlan0: interface state ENABLED->DISABLED
Mon May 15 01:49:06 2017 daemon.notice hostapd: wlan0: AP-STA-DISCONNECTED 80:7a:bf:3c:7f:07
Mon May 15 01:49:06 2017 daemon.notice hostapd: wlan0: AP-DISABLED
Mon May 15 01:49:06 2017 daemon.notice hostapd: wlan0: CTRL-EVENT-TERMINATING
Mon May 15 01:49:06 2017 daemon.notice hostapd: nl80211: deinit ifname=wlan0 disabled_11b_rates=0
Mon May 15 01:49:06 2017 kern.info kernel: [ 589.001314] device wlan0 left promiscuous mode Mon May 15 01:49:06 2017 kern.info kernel: [ 589.006054] br-lan: port 3(wlan0) entered disabled state
Mon May 15 01:49:06 2017 daemon.notice hostapd: wlan1: interface state ENABLED->DISABLED
Mon May 15 01:49:06 2017 daemon.notice hostapd: wlan1: AP-DISABLED
Mon May 15 01:49:06 2017 daemon.notice hostapd: wlan1: CTRL-EVENT-TERMINATING
Mon May 15 01:49:06 2017 daemon.notice hostapd: nl80211: deinit ifname=wlan1 disabled_11b_rates=0
Mon May 15 01:49:06 2017 kern.info kernel: [ 589.037885] device wlan1 left promiscuous mode
Mon May 15 01:49:06 2017 kern.info kernel: [ 589.042585] br-lan: port 2(wlan1) entered disabled state
Mon May 15 01:49:06 2017 daemon.notice netifd: Network device 'wlan0' link is down
Mon May 15 01:49:06 2017 daemon.notice netifd: Network device 'wlan1' link is down
Mon May 15 01:49:06 2017 user.notice root: the button was rfkill and the action was pressed
Mon May 15 01:49:07 2017 daemon.err hostapd: Configuration file: /var/run/hostapd-phy1.conf
Mon May 15 01:49:07 2017 kern.info kernel: [ 590.607100] device wlan1 entered promiscuous mode
Mon May 15 01:49:07 2017 kern.info kernel: [ 590.612044] br-lan: port 2(wlan1) entered forwarding state
Mon May 15 01:49:07 2017 kern.info kernel: [ 590.617636] br-lan: port 2(wlan1) entered forwarding state
Mon May 15 01:49:07 2017 daemon.err hostapd: Configuration file: /var/run/hostapd-phy0.conf
Mon May 15 01:49:07 2017 daemon.notice hostapd: wlan1: interface state UNINITIALIZED->COUNTRY_UPDATE
Mon May 15 01:49:07 2017 daemon.notice hostapd: ACS: Automatic channel selection started, this may take a bit
Mon May 15 01:49:07 2017 daemon.notice hostapd: wlan1: interface state COUNTRY_UPDATE->ACS
Mon May 15 01:49:07 2017 daemon.notice hostapd: wlan1: ACS-STARTED
Mon May 15 01:49:09 2017 daemon.notice hostapd: handle_probe_req: send failed
Mon May 15 01:49:09 2017 daemon.notice hostapd: handle_probe_req: send failed
Mon May 15 01:49:09 2017 kern.info kernel: [ 592.129913] br-lan: port 2(wlan1) entered disabled state
Mon May 15 01:49:09 2017 daemon.notice hostapd: wlan0: interface state UNINITIALIZED->COUNTRY_UPDATE
Mon May 15 01:49:09 2017 kern.info kernel: [ 592.171318] device wlan0 entered promiscuous mode
Mon May 15 01:49:09 2017 daemon.notice hostapd: ACS: Automatic channel selection started, this may take a bit
Mon May 15 01:49:09 2017 daemon.notice hostapd: wlan0: interface state COUNTRY_UPDATE->ACS
Mon May 15 01:49:09 2017 daemon.notice hostapd: wlan0: ACS-STARTED
Mon May 15 01:49:12 2017 daemon.notice hostapd: handle_probe_req: send failed
Mon May 15 01:49:12 2017 daemon.notice hostapd: handle_probe_req: send failed