Home Auotmation adaptor for a La-Z-boy™ chair. This first version only reclines. I didn't have enough of the right relays onhand to contol every function.
My model of La-Z-boy™'s Wire Legend*
- Yellow ,GND
- Red ,+30v
- Black ,Lumbar ,In
- White ,Lumbar ,Out
- Pink ,Headrest ,In
- Grey ,Headrest ,Out
- Brown ,Legs ,Out
- Green ,Legs ,In
- Blue ,Back ,Out
- Orange ,Back ,In
*Colors and pin positions are for my chair only. I don't know if La-Z-boy™ kept connector connections standard for all models. Verify all the wires by checking for voltage on each when using the remote.
This is my prototype for testing. I ordered plugs so I can design an enclosure that can be installed by attaching it inline with the controller and base.
Hardware:
- 10 5v relays to control every function. I only have one for my prototype that I use to recline the back and open the legs together.
- 1 nodemcu v1
- 1 DC-DC adjustable voltage regulator for 5v to power the MCU and relay trigger
- need to go from 30v to 3.3v to ~ 9v (i think nodemcu can take up to 9v on vin)
Notes:
- The chair electronics include limit switches that switch current away from the linear actuators when they hit
- their limits. I take advantage of this and wrote a lazy implementation of the recline code. It sends the recline
- signal for 15 seconds and does not check for feedback. The chair reclines in about 5 seconds so I can reduce the
- time to 5 seconds to reduce the time an open signal is sent to the relay when it doesn't move. I might eventually
- try to use the limit switches for feedback but they aren't exposed at the controller port so each limit switch
- would need to be wired directly to the pads in the main enclosure, making installing this device a lot more difficult.
- My goal is to make something anyone can plug in and add to their home automation implementation.