Are there any GPIO available on the RB411U? I don’t mind soldering a wire to some place on the board to access a single line. I want to connect a 1-wire device. I am running openWRT and can turn the LEDs on and off, but need something that supports input.
Look at the schematic for the cpu to see if it exists, then see if there are any traces on the pcb to those pins. If the leds are connected to an actual gpio, you might could remove the led and change the pin to input.