wifi reset button and wifi reset without reboot

after while mu yun seems lose wifi connection (drop). not sure due yun or router. debug answers following questions:

pressing wifi rst button <5 sec not reset @ all, correct (it lets led blink)?

pressing wifi rst button >=5 <30 sec run wifi-reset-and-reboot script, correct?
this script return yun in ap mode + reboot yun, correct?

is there way (programmatically) reset wifi without going ap mode , without rebooting yun? i.e. turning on/off wifi on tablet?
edit: looking openwrt docs, should possible wifi (down) command.

the wifi-live-or-reset script ran after boot. if let's after 10 minutes wifi network drops, there nothing in yun automatically try go ap mode, correct? (i hope so)

if console via ethernet  port:

code: [select]

ifconfig

code: [select]

ifconfig wlan0 down

code: [select]

ifconfig

code: [select]

ifconfig wlan0  up

code: [select]

ifconfig

the code looking :

code: [select]

ifconfig wlan0 down; ifconfig wlan0 up

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