https://nalar.dev/tags/gesture-sensor/ Recent content in Gesture Sensor on Nalar Hugo en-us Sat, 19 Sep 2026 00:00:00 +0000 https://nalar.dev/gesture-controlled-air-conditioner-esp32-s3-without-camera/ Sat, 19 Sep 2026 00:00:00 +0000 https://nalar.dev/gesture-controlled-air-conditioner-esp32-s3-without-camera/ <p>A camera is unnecessary when an air-conditioner controller only needs a small vocabulary of hand motions. The useful signal is not an image of the hand; it is a directional event such as up, down, left, or right. A short-range optical gesture sensor can reduce that input to a few bytes before the ESP32-S3 sees it.</p> <p>That changes the embedded design substantially. There is no camera frame buffer, DVP bus, image preprocessing, or inference model competing with the LCD and infrared transmitter. The ESP32-S3 can spend its resources on the part that actually needs careful handling: keeping the intended AC state synchronized with each gesture and encoding that state into the appliance&rsquo;s IR protocol.</p>