ESP-02 ESP8266 802.11 WiFi Module
ESP-02 overview
ESP-02 ESP8266 module is a highly integrated WiFi 802.11 b/g/n module that consumes extremely low power while providing a wireless internet connection for embedded devices. With a very small form factor (18mm by 20mm), this wireless module easily assimilates into resource limited devices. These features make ESP-02 a great choice for OEMs to connect their IoT (Internet of Things) applications. The embedded ESP8266EX chip gives the ESP-WROOM-02 module a wake up and transmits at a packet speed of less than 2ms which makes it a great solution for a wide variety of applications including IoT, EDGE computing, etc.
ESP-02 WiFi Module integrates a Tensilica L106 32-bit RISC processor, which achieves extra-low power consumption and reaches a maximum clock speed of 160 MHz. The Real-Time Operating System (RTOS) and Wi-Fi stack allow 80% of the processing power to be available for user application programming and development
Key specifications
Datasheet
ESP-02 features
- Works in WiFi 802.11 b / g / n standards; 2.4 GHz frequency
- Works in Access Point, Standalone, and combined mode (AP + STA)
- Supports LwIP
- Controlled by AT commands using UART
- Built-in antenna
- Simple AT commands for all operations.
- Connection-based data reception or transparent data reception.
- Programmable client connection inactivity timeout.
- Automatic domain name address resolution for public domain names but not local domain names within the local area network (router).
- PCB Thickness: 1mm
- Weight: 2 gm
- Supports WPA / WPA2 security
- 2x4 gold pin connectors with 2.54 mm pitch
ESP-02 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | GND | Module Ground Pin |
| 2 | RX | Serial Receive Pin of UART |
| 3 | TX | Serial Transmit Pin of UART |
| 4 | 3.3V | 3.3 V Power Pin |
| 5 | GPIO 1 | General Purpose I/O Pin 1. Also known as TX/RX pins as they are also used in the Programming of the module or for serial I/O purposes. |
| 6 | GPIO 0 | General Purpose I/O Pin 0. Also known as TX/RX pins. |
| 7 | GPIO 2 | General Purpose I/O Pin 2. Also known as TX/RX pins. |
| 8 | RST | Active Low Reset Pin |
ESP-02 applications
- Home appliances
- Sensors and detectors
- Security alarms
- Monitor and scales
- Mesh Networks
- Industrial Wireless Control
- Wearable Electronics
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