I have a Raspberry PI 3 (B). I'm accessing it remotely via wlan0 - built in WiFi chip.
Now, for sake of pen testing i got myself a separate USB WiFi card. The problem is that, after i finish experimenting with wlan1, my PI disables both wlan0 and wlan1 so i can't access my PI anymore unless i connect it to a monitor and fix things while directly connected.
How to disable turning off certain device like wlan0?