ADIY 4 Channel ESP32 IOT Relay Module

Welcome to the ADIY IoT Relay Board. This ultra-compact, precision-engineered automation board is powered by the ESP32-WROOM module, combining robust built-in Wi-Fi and Bluetooth with industrial-grade switching capabilities. Designed for smart home integration, DIY IoT projects, and automation, this board stands out by offering onboard high-isolation relays, a dedicated I2C header, and a massive 16-pin GPIO breakout for ultimate customization.

Key Advantages Over Mechanical Relays:-

1. Silent operation (no clicking).

2. Longer lifespan (>1M cycles).

3. Zero-crossing for reduced EMI.

4. Opto-isolation for safety

Key Features: – 

• Ultra-Compact Form Factor: Measuring roughly 85mm x 50mm, it fits easily into standard junction boxes and enclosures.

• ESP32 Core: Built-in Wi-Fi and Bluetooth/BLE for wireless control.

• 4x Onboard Relays (QY46F): High-quality, 5V-coil relays for switching external loads, configured in a secure, Normally Open (NO) setup.

• Opto-Isolated Drive: Relays are driven via optocouplers to ensure physical isolation between the low-voltage ESP32 and high-voltage loads.

• I2C Expansion Port: Dedicated top-mounted 4-pin header for plug-and-play sensors and displays.

• Extensive GPIO Breakout: A 16-pin bottom header exposing analog and digital pins for maximum expandability.

• Physical Safety: Features physical PCB isolation milling (slots) around the high-voltage relay traces to prevent electrical arcing.