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ESP8266 Serial WiFi Module — ESP-12E / ESP-12F / ESP-12S, 802.11 b/g/n, AT Commands
ESP8266 Serial WiFi Module ESP-12E / ESP-12F / ESP-12S, 802.11 b/g/n, AT Commands
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$7.80 USD
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ESP8266 Serial WiFi Module — ESP-12E / ESP-12F / ESP-12S, 802.11 b/g/n, AT Commands
The ESP8266 ESP-12 series are compact, high-integration WiFi modules built on the Espressif ESP8266EX SoC. With 4MB flash, 11 GPIO pins, and support for AT commands via UART or full standalone programming via Arduino IDE / MicroPython, they are the most versatile ESP8266 form factor for IoT nodes, wireless sensor networks, and Arduino WiFi expansion.
Variant Comparison
| Variant | Antenna | Shield | Key Difference |
|---|---|---|---|
| ESP-12E | PCB trace | Metal | Standard, most common |
| ESP-12F | PCB trace (optimized) | Metal | Improved RF performance vs ESP-12E |
| ESP-12S | PCB trace | Metal | Simplified pinout, FCC/CE certified |
Key Specifications
| Parameter | Value |
|---|---|
| SoC | Espressif ESP8266EX |
| WiFi Standard | 802.11 b/g/n, 2.4GHz |
| Flash Memory | 4MB |
| GPIO Pins | 11 (including SPI, I²C, UART, ADC) |
| Supply Voltage | 3.3V |
| Antenna | PCB trace (onboard) |
| Security | WPA / WPA2 |
| Programming | AT commands (UART) or Arduino IDE / MicroPython |
Why Choose ESP-12 Series?
- ✅ 4MB flash — sufficient for full Arduino sketches and OTA updates
- ✅ 11 GPIO pins — more I/O than ESP-01, suitable for complex sensor nodes
- ✅ Metal shield — better EMI shielding than bare modules
- ✅ AT command support — use as WiFi co-processor with Arduino Uno/Mega
- ✅ Arduino IDE compatible — program standalone with ESP8266 board package
Typical Applications
- Arduino WiFi expansion via AT commands
- Standalone IoT sensor node (temperature, humidity, CO2)
- HTTP / MQTT client for cloud data upload
- WiFi-controlled relay and smart switch
- Remote sensor monitoring over WiFi
Package Contents
- 1 × ESP8266 WiFi Module (ESP-12E, ESP-12F, or ESP-12S, as selected)
