The ESP8266MOD is a compact and cost-effective Wi-Fi module developed by Espressif Systems, widely used in IoT (Internet of Things) applications. It is built around the ESP8266 SoC (System on Chip), which integrates a full TCP/IP stack, microcontroller functionality, and Wi-Fi connectivity—all in a single module.
Key Features:
- Wi-Fi Support: 802.11 b/g/n, enabling it to connect to wireless networks or act as an access point.
- Built-in Microcontroller: Typically includes a 32-bit Tensilica L106 microcontroller running at 80 MHz (can be overclocked to 160 MHz).
- Flash Memory: Usually comes with 512 KB to 4 MB flash memory, depending on the model.
- GPIO Pins: Provides general-purpose input/output pins that support interfaces like UART, SPI, I2C, PWM, and ADC.
- Low Power Consumption: Supports deep sleep mode for power-saving applications.
- Programmable: Can be programmed using the Arduino IDE, Lua, or AT commands.
Basic Working:
The ESP8266MOD can operate in three modes:
- Station Mode (STA): Connects to an existing Wi-Fi network to access the internet or a local server.
- Access Point Mode (AP): Creates its own Wi-Fi hotspot, allowing other devices to connect to it.
- Station + AP Mode: Operates as both a station and an access point simultaneously.
It can send/receive data over Wi-Fi, host web servers, communicate via HTTP/MQTT protocols, or interact with other microcontrollers and sensors.
Common Use Cases:
- Home Automation: Smart lighting, switches, and security systems.
- IoT Devices: Remote sensors, data loggers, and monitoring systems.
- DIY Projects: Weather stations, smart garden systems, or connected wearables.
- Industrial Applications: Remote machine monitoring or telemetry.
- Embedded Web Servers: Hosting configuration or control interfaces.