Smart Relay Controller 🔧 Go to Programmer 📌Device ✅ Features Supports up to 16 relays Based on ESP32 microcontroller Integrated support for SIM800L GSM module Connector Dual power input: 5V/2A DC Jack or USB Type-C Jumper-selectable power source (prevents USB overcurrent) Relay pattern storage up to 2000Rows Onboard status LED indicators for each relay Ideal for home automation, industrial control, and IoT projects 📌 Pinout Diagram 🔌 Wiring Diagram ⚠️ Notes This circuit only works with a 5V / 2A power supply or a Type-C USB connection. When powering via Type-C from a computer, remove the J1 jumper to avoid powering relays from the USB port (may cause damage). Use a regulated and smooth power supply for stable operation.