<p>ESP32 dual-channel 30A relay development board is a development board based on Espressif's ESP32-WROOM-32E module. The I\/O port is fully led out and supports DC7-28V\/5V power supply.</p> <p>Onboard programmable buttons, LEDs and relays facilitate developers to quickly conduct prototype verification and development, and bring more possibilities for loT control scenarios.</p> <p>After burning the program, it can be directly controlled by mobile phone remotely. The onboard LEDs and relays have functions such as WiFi network configuration and factory reset.</p> <p>Onboard 2-way 5V\/30A relays, output switch signals, suitable for controlling loads with working voltage within AC 250V\/DC30V.</p> <p>ESP32 supports the use of development tools such as for ArduinolDE\/VSCode\/Tonny.</p> <p>Instructions for use:</p> <p>The relay control pins are GPIO12 and GPIO13, and high level is valid.</p> <p>The programmable LED is GPIO5, and low level is valid. Users can write their own program control.</p> <p>The programmable button is GPIO0. It is also the burning button.</p> <p>Relay output terminal:</p> <p>NC: Normally closed terminal, short-circuited with COM before the relay is energized, and left floating after energization;</p> <p>COM: Common terminal;</p> <p>NO: Normally open terminal, left floating before the relay is energized, and left short-circuited with COM after energization;</p> <p>Colour:blue</p> <p>Material:PCB+Components</p> <p>Due to different batches, there may be differences in product appearance and printed text, which will not affect use</p> <p>Package Contents:</p> <p>1 * ESP32 2-channel 30A relay module</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>