@Kubas Yes, but with openwrt in the middle, because tplink has prevented going from 1.3.x to 1.2.x. Or perhaps it is possible to go fron 1.3 to 1.2 with tftp (I didn't try). With the web interface it...

@Kubas I followed this procedure from ofiicial to wrt and from wrt to official: https://openwrt.org/toh/tp-link/tp-link_archer_c6_v2

@RedIndianRobin From 1.2.x I have installed openwrt and then gone back to 1.2.x using tftp. You just follow openwrt instructions. But in wrt 5ghz is not stable enough yet.

@RedIndianRobin Here you have 1.2.1 (the last one in this page): https://www.tp-link.com/es/support/download/archer-c6/v2/#Firmware

@MikeTelcontar Yo el C6 ya no lo uso. Puse de nuevo el que me dio mi operador de fibra. Es más lento, menos funciones, pero no falla. Cuando el C6 sea estable lo volveré a poner. Durante un tiempo le...

@MikeTelcontar Leyendo el eblace de antes, puedes ver que hay quien lo palía un poco apagando la red de invitados, y programando el router para reiniciarse cada noche, por ejemplo.