ESP8266 Serial Port WIFI Module
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DESCRIPTION
The ESP8266 Serial Port Wi-Fi Module (ESP-01) is a compact Wi-Fi module based on the ESP8266 chip. It enables microcontrollers such as Arduino to connect to Wi-Fi networks and communicate over the internet using a simple UART (serial) interface. It can also be programmed as a standalone microcontroller using the Arduino IDE.
Specifications
Feature | Description | Module | ESP8266 ESP-01 | Wi-Fi Standard | IEEE 802.11 b/g/n
(2.4 GHz) | Operating Voltage | 3.0–3.6 V (3.3 V
recommended) | Logic Level | 3.3 V | Flash Memory | 1 MB (typical
ESP-01S), varies by version | CPU | 32-bit Tensilica
L106 @ 80 MHz (up to 160 MHz) | RAM | 80 KB User RAM | Communication | UART (Serial) | Operating Current | 70–300 mA (peak
current can exceed 300 mA) |
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Features
- Built-in Wi-Fi connectivity
- TCP/IP networking support
- Connects to cloud platforms (ThingSpeak, Firebase, MQTT, etc.)
- UART serial communication
- Can operate as a standalone microcontroller
- Supports Station (STA), Access Point (AP), and STA+AP modes
- Supports OTA (Over-the-Air) firmware updates
Pin Configuration
Pin | Function | VCC | 3.3 V power | GND | Ground | TX | UART transmit | RX | UART receive | GPIO0 | Boot mode selection /
GPIO | GPIO2 | General-purpose I/O | CH_PD (EN) | Chip enable (connect
to 3.3 V) | RST | Reset input |
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