I am using the R2s and after changing a port forwarding rule in the Lua web interface, the unit rebooted and never came back to life: the power LED is now blinking twice every second and the network interfaces are not accessible anymore. I tried flashing a new copy of the ISO (rk3328-sd-friendlywrt-5.4-20200904.img) and the condition remains: I cannot access the device anymore. :cry:
What does the double blinking of the power LED mean?
How can I access the device if the network ports are not available?

thanks for your help