The ESP8266 WiFi Transceiver Module is a compact board built around the ESP8266 chip — a full WiFi SoC (System on Chip) with a built-in processor and TCP/IP stack. The esp8266 wifi module supports 802.11 b/g/n wireless standard on the 2.4GHz band, covering the frequency range 2400MHz to 2483.5MHz. It communicates with a host microcontroller over UART (a two-wire serial interface) or can run firmware entirely standalone without a separate processor. GPIO (General Purpose Input/Output) pins let you connect sensors and control outputs directly from the chip.
The esp 12e module variant uses a metal shielding can over the RF circuitry, which reduces interference from nearby components on your PCB. A non-obvious fact — the ESP8266 has a single ADC (Analogue to Digital Converter) pin, but it only reads up to 1V by default. Most breakout boards include a voltage divider to bring the range up to 3.3V. The honest trade-off is power consumption. Deep sleep reduces current dramatically, but active WiFi transmission pulls 80mA average, which drains small batteries quickly during continuous operation.
The esp8266 wifi module pins support HSPI, I2C, I2S, and PWM alongside standard UART, giving a wide range of peripheral options. Engineers building IoT sensor nodes, students learning MQTT-based projects, and makers prototyping home automation systems use this module regularly. Load firmware using the Arduino IDE with the ESP8266 board package installed — or use MicroPython for scripted operation. To start, connect VCC to 3.3V, GND to ground, VCC, then flash over serial. StemVolt ensures fast, reliable delivery of products across India with trusted service.
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Ecplore the ESP boards for build creative iot projects
Features:
- 802.11 b/g/n WiFi over the 2.4GHz band connects to standard routers for internet-based IoT projects.
- UART serial interface supports full MQTT firmware builds using Arduino IDE or MicroPython sketch directly.
- GPIO pins cover PWM, I2C, HSPI, and I2S which allows direct peripheral control without external ICs.
- Operating voltage of 3.3V to 3.6V (recommended 3.3V) protects GPIO from overvoltage on all pins.
Technical specifications:
| Specification | Details |
|---|---|
| Item Type | WiFi Module |
| Based On | ESP8266 Based |
| Wireless Standard | 802.11 b/g/n |
| Frequency | 2.4GHz-2.5GHz (2400M-2483.5M) |
| Data Interface | UART / HSPI / I2C / I2S / Ir Remote Contorl GPIO / PWM |
| Operating Voltage | 3.0 ~ 3.6V (recommendation 3.3V) |
| Working Current | 80mA (Average) |
| Operating Temperature (°C) | -40 to 125 |
Applications:
- Smart home light switch uses this WiFi module to toggle a relay from a phone app.
- Weather station project sends temperature and humidity readings to a cloud dashboard over WiFi.
- ESP8266 WiFi Transceiver Module reads MQTT broker messages and controls three GPIO output pins remotely.
- ESP12E ESP8266 WiFi Transceiver Module for arduino bridges serial sensor data to a web server over 802.11n.
- Deep sleep firmware project wakes the ESP8266 every 5 minutes, reads a soil sensor, and posts data online.
Package includes:
- 1 x ESP12E ESP8266 WiFi Transceiver Module
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