NodeMCU V3 (ESP8266) development boards x3

3 NodeMCU V3 (ESP8266) development boards

These are the actual items in the photo that will be shipped.

These are incredibly popular, budget-friendly microcontrollers widely used for IoT (Internet of Things) and smart home automation projects.

Key Features Visible in the Image:

The Core Module: The silver metal shield houses the ESP8266MOD (typically an ESP-12E or ESP-12F chip), which provides built-in 2.4GHz Wi-Fi capabilities.

PCB Antenna: The squiggly gold/copper trace on the left edge of each board is the integrated Wi-Fi antenna.

Connectivity & Power: On the right, there is a Micro-USB port used for both powering the board and flashing your code from a computer.

Onboard Buttons:

RST: Reset button to reboot the board.

IO0 (Flash): Used to put the chip into flashing mode (though modern IDEs usually handle this automatically via the USB-to-UART chip).

Common Uses:

Because they can be programmed easily using the Arduino IDE, MicroPython, or ESPHome, they are perfect for:

Reading sensor data and sending it to a local server or cloud dashboard.

Controlling relays, LEDs, or displays over Wi-Fi.

Integrating custom DIY hardware into smart home platforms like Home Assistant.