ESP32 Intelligent LED

As luck would have it, I had a small desk lamp I bought on Taobao, but controlling the switch required manually plugging and unplugging the USB port, which wasn't very elegant for an embedded engineer. So, I used my Xiao Ai smart home system to achieve remote and local control of the lamp via an ESP32 microcontroller.
Hardware: 1. This bedside lamp only requires a simple 5V input to light up, so we can control the input power using a MOSFET circuit. 2. Since it's MOSFET-controlled, we can adjust the MOSFET's on/off state to adjust the lamp's brightness via PWM control. 3. Increasing or decreasing the lamp's brightness by repeatedly pressing a button seems simple, but... it's not elegant; therefore, we can use an encoder to increase or decrease the lamp's brightness.
Software:
1. There are multiple paths for ESP32 development, but based on the simplest implementation principle, I quickly implemented it using Arduino. 2. For smart home systems controlled by Xiao Ai, there are many development paths online; following the principle of simplicity, we implemented it using a third-party device from Diandeng Technology.