To accomplish this, a board from an old dehumidifier was used. The board was chosen because it has two 8-segment displays, 7 buttons and 8 LEDs, all of which are controlled from only seven pins thanks to a shift register IC( 23 pins if the system was not multiplexed!).
The next step was to modify the existing PCB cover to correspond to the newly programmed controls. Up and down buttons next to the 8-segment display increase and decrease the number of washing cycles and the start/stop buttons start the cycle and stop 'listening' for a signal from the dishwasher.