ESP8266-01 Serial WiFi Wireless Module

ESP8266-01 Serial WiFi Wireless Module brings simple and cost-effective WiFi connectivity to embedded systems. Compact yet powerful, it allows developers to add wireless networking to microcontrollers, IoT devices, and automation projects without complex hardware design.

Key Features:

• Built-in WiFi Stack: Offers full TCP/IP protocol support for seamless internet access.
• UART Serial Interface: Communicates easily with microcontrollers via standard AT commands.
• Integrated 32-bit Processor: Enables standalone operation or co-processing with host MCUs.
• Low Power Modes: Supports sleep functions for battery-powered applications.
• Compact Design: Small form factor fits into space-constrained projects.
• Strong Community Support: Widely documented with numerous open-source libraries and tutorials.

Technical Specifications:

• WiFi Standard: IEEE 802.11 b/g/n
• Operating Voltage: 3.0 V to 3.6 V (recommended 3.3 V)
• Current Consumption: ~80 mA during data transmission
• Operating Frequency: 2.4 GHz ISM band
• Data Rate: Up to 72 Mbps
• Interface: UART (RX, TX), GPIO support
• Security Protocols: WPA/WPA2 encryption
• Operating Temperature: −40 °C to +125 °C

Mechanical Specifications:

• Module Type: ESP-01 with PCB antenna
• Connector: 2×4 2.54 mm header pins
• Antenna: On-board PCB trace antenna
• Mounting: Direct insertion into standard 2.54 mm pitch sockets

Dimensions:

• Length: Approx. 24.8 mm
• Width: Approx. 14.3 mm
• Height: Around 3.1 mm (excluding pin headers)
• Pin Pitch: 2.54 mm (standard)

Pinout and Wiring:

• VCC: Power input (3.3 V only)
• GND: Ground
• TX: UART transmit
• RX: UART receive
• GPIO0: General-purpose I/O (also used for programming mode)
• GPIO2: General-purpose I/O
• CH_PD / EN: Chip enable (connect high to activate module)
• RST: Reset pin (active low)
• Wiring Tip: Always use a 3.3 V regulator and level shifting when connecting to 5 V logic.

Datasheet Reference:

• Refer to the official Espressif ESP8266 datasheet and AT command set documentation for complete technical details.

Applications:

• IoT Projects: Connect sensors and devices to the cloud over WiFi.
• Home Automation: Control appliances, lights, and relays wirelessly.
• Smart Devices: Add network connectivity to microcontroller projects.
• Wireless Data Logging: Send sensor readings to servers or mobile apps.

Equivalent Models:

• ESP8266-12E: Larger module with more GPIO pins
• ESP32-WROOM-32: Successor module with dual-core processor and Bluetooth
• NodeMCU Development Board: ESP8266 with USB-to-serial and onboard regulator for easier prototyping

Package Includes:

• 1 x ESP8266-01 Serial WiFi Wireless Module