You're not the only one who has had problems with wifi on DIR645 and Lede/OpenWRT: D-Link DIR-645 WiFi interface not maintaining connection
Freeing memory will probably not do anything to fix it.
You're not the only one who has had problems with wifi on DIR645 and Lede/OpenWRT: D-Link DIR-645 WiFi interface not maintaining connection
Freeing memory will probably not do anything to fix it.