The ESP-01 ESP8266 Wi-Fi Serial Module for IoT is a classic, lightweight wireless module designed to add Wi-Fi connectivity to microcontrollers or operate as a standalone micro-controller for… 3.0V to 3.6V DC (3.3V nominal, 5V non-tolerant).
The ESP-01 ESP8266 Wi-Fi Serial Module for IoT is a classic, lightweight wireless module designed to add Wi-Fi connectivity to microcontrollers or operate as a standalone micro-controller for small-footprint Internet of Things (IoT) devices. Built around the Espressif ESP8266EX 32-bit RISC processor operating at 80 MHz (up to 160 MHz), it delivers complete 802.11b/g/n Wi-Fi networking in a tiny 14.3mm × 24.8mm form factor.
The module comes equipped with 1MB (8Mbit) of SPI flash memory and an integrated PCB trace antenna. Out of the box, it includes factory pre-loaded AT command firmware, allowing microcontrollers like Arduino, AVR, or STM32 to send and receive data over Wi-Fi via standard UART serial commands. Alternatively, it can be directly flashed with custom firmware using the Arduino IDE, NodeMCU (Lua), or MicroPython.
Featuring a 2 × 4 dual-in-line header (2.54mm pitch), the ESP-01 breaks out 8 essential pins: V_CC, GND, TX, RX, RST, CH_PD (Enable), GPIO0, and GPIO2. It operates strictly on a 3.0V to 3.6V DC supply (3.3V nominal) and features multiple low-power sleep modes.
| Core Processor | Espressif ESP8266EX Tensilica Xtensa 32-bit LX106 RISC CPU @ 80 MHz / 160 MHz |
|---|---|
| Onboard Memory | 1MB (8Mbit) SPI Flash Memory |
| Wireless Protocol | 2.4 GHz Wi-Fi (802.11b/g/n, up to 72.2 Mbps) with WPA/WPA2 security |
| Operating Modes | Station (STA), Soft Access Point (SoftAP), and STA + SoftAP dual mode |
| Antenna Type | Onboard 3dBi 2.4GHz PCB trace antenna |
| Power Supply Voltage | 3.0V to 3.6V DC (3.3V nominal, 5V non-tolerant) |
| Serial Communication | Standard UART Interface (TX/RX) |
| Available GPIOs | 2 general-purpose I/O pins (GPIO0 and GPIO2) |
| Integrated Network Stack | Full onboard TCP/IP protocol stack |
| Package Style | 8-pin (2 × 4) header layout with standard 2.54mm pin pitch |
What is the operating voltage?
3.0V to 3.6V DC (3.3V nominal, 5V non-tolerant).
Which interface does it use?
2.4 GHz Wi-Fi (802.11b/g/n, up to 72.2 Mbps) with WPA/WPA2 security.
Is it compatible with Arduino and ESP8266?
Yes. It works with Arduino, ESP8266, NodeMCU, STM32 projects.
Can I buy the ESP-01 ESP8266 Wifi Serial Module For IOT in Kanpur?
Yes – buy online with delivery across India, or pick it up from the iTechBuilders store, Damodar Nagar, Kanpur.
