Today I’m showing you how I use ESP32 + ESP-NOW to toggle and dim LEDs wirelessly, instantly, and in real time. The whole idea is simple: a transmitter ESP32 reads three push buttons (on/off for three receivers) and a 10K potentiometer that acts like a “volume knob” for brightness. I cleaned up the controller by ditching the big breadboard button block and switching to basic 2‑pin push buttons with the ESP32’s internal pull-up resistors—so no extra resistors needed for the buttons. On the receiver side, each ESP32 drives a MOSFET module, so the ESP32 only has to send a value over ESP‑NOW and the MOSFET does the heavy lifting. In my previous ESP‑NOW build I was only sending a boolean for on/off, but here I’m sending a power level and using PWM at 20 kHz, which stays completely silent for LEDs and small motors. I also show how easy it is to swap loads: I pull off the 12V LED strip and drop in a small DC motor, then just change the power supply (I ran it at 9V). Same wiring to the ESP32 header, same control—now it’s wireless speed control too. If you run into brownouts or random resets, add a big capacitor on the power rail and keep your wires short.