I have came across a proplem that i need to partitially control another device i have zero control over.
It does use rotatory switch with a push button, from what I did inspect it does pull the lines low(gnd) and pull ups enabled by the micro in the said device to get the line high, so every other turn of the knob does ground the lines(depending on the direction one pin after another).
What the proplem is i can control the device in every other position of the knob(when it's not pulling the lines to gnd), is there anyway to control the device in every position of the knob without pulling it off and re-wiring?
PS. And if someone is wondering why, im building "universal" steering wheel control kit which let's one replace headunit of car with tablet or phone while retaining steering wheel controls, but did get request of controlling the main volume directly rather than the source volume(phone/tablet)