WiFi Module ESP8266 – details of ESP8266 WiFi Module for Arduino

ESP8266 wifi module for arduino and raspberry pi

What is a WiFi module ESP8266 ?

  • A WiFi module ESP8266 is a microcontroller made by Espressif.
    It is loaded with features. The most important being wi-fi protocol. The best part is that they are dirt cheap and more powerful than an Arduino.
  • The wifi module ESP8266 is an extremely cost-effective board with a huge, and ever-growing, community.
  • The ESP8266 WiFi Module with SOC with integrated TCP/IP protocol stack, this protocol stack allows the microcontroller connects to Wi-Fi.
  • The ESP8266 is capable of an act as a server i.e. hosting an application or client, a client will receive all Wi-Fi networking functions from another processor.
  • ESP 8266 compatible with Arduino board, you can program ESP using ARDUINO IDE, popular as WiFi module for Arduino.
  • Each ESP8266 module comes with pre-programmed an AT command set firmware.
  • ESP 8266 available from esp-01 module to esp-12e module.
  • More common module are esp-07 and esp-12e.



ESP 8266 can be used in following applications

Use of ESP 8266 wifi module

  • Home Appliances
  • Home Automation
  • Smart Plugs and Lights
  • Mesh Network Industrial Wireless Control
  • Baby Monitors
  • IP Cameras  Sensor Networks
  • Wearable Electronics
  • Wi-Fi Location-aware Devices
  • Security ID Tags
  •  Wi-Fi Position System Beacons
  • Wifi module for Arduino board



  • 802.11 b/g/n
  • Wi-Fi Direct (P2P), soft-AP
  • Integrated TCP/IP protocol stack
  • Integrated TR switch, balun, LNA, power amplifier and matching network
  • Integrated PLLs, regulators, DCXO and power management units
  • +19.5dBm output power in 802.11b mode
  • Power down leakage current of <10uA
  • 1MB Flash Memory
  • Integrated low power 32-bit CPU could be used as application processor
  • SDIO 1.1 / 2.0, SPI, UART
  • STBC, 1×1 MIMO, 2×1 MIMO
  • A-MPDU & A-MSDU aggregation & 0.4ms guard interval
  • Wake up and transmit packets in < 2ms
  • Standby power consumption of < 1.0mW (DTIM3)
  • Power 3.3 v


ESP 8266 wi-fi module Specification


  • Standards FCC/CE/TELEC/SRRC
  • Protocols 11 b/g/n/e/i
  • Frequency Range 2.4G ~ 2.5G (2400M ~ 2483.5M)


  • CPU Tensilica L106 32-bit micro-controller
  • Peripheral Interface UART/SDIO/SPI/I2C/I2S/IR Remote Control
  • GPIO/ADC/PWM/LED Light & Button
  • Operating Voltage 3.0V ~ 3.6V
  • Operating Current Average value: 80 mA
  • Operating Temperature Range -40°C ~ 125°C
  • Storage Temperature Range -40°C ~ 125°C



  • Wi-Fi Mode                    Station/softAP/SoftAP+station
  • Security                          WPA/WPA2
  • Encryption                     WEP/TKIP/AES
  • Firmware Upgrade        UART Download / OTA (via network)
  • Software Development Supports Cloud Server Development / Firmware and SDK for fast on-chip programming
  • Network Protocols        IPv4, TCP/UDP/HTTP/FTP
  • User Configuration AT Instruction Set, Cloud Server, Android/iOS App


ESP8266 WiFi module Datasheet and Documents for detail study


Let us know what you think about ESP8266 WiFi module for Arduino in the comment section below.

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Featured Image credit: Espruino

Naval Allurwar
He is a learner and passionate about IoT ,and other new technologies. He has good industrial experience in IoT & Smart cities. He love to learn new things & make understandable to others at IoTDunia.com .