WIFI module ESP-01, ESP8266

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 The ESP8266 ESP-01 module is a Wi-Fi module that allows microcontrollers (like Arduino) to access a Wi-Fi network. The ESP8266 WiFi Module is a self contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network. The ESP8266 is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor.

This module has a powerful enough on-board processing and storage capability that allows it to be integrated with the sensors and other application specific devices through its GPIOs with minimal development up-front and minimal loading during runtime. Its high degree of on-chip integration allows for minimal external circuitry, including the front-end module, is designed to occupy minimal PCB area. This makes the ESP8266 very versatile, and it can save you on cost and space in your projects.


  • The ESP8266 Module is not capable of 5-3V logic shifting and will require an external Logic Level Converter. Please do not power it directly from your 5V dev board.
  • This new version of the ESP8266 WiFi Module has increased the flash disk size from 512k to 1MB.


  • 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)

The module has a 2 x 4 Header on the assembly.  See pic for layout as the boards may not have the pins labeled.

  • GND =  Ground.  Connect to ground on MCU
  • GPIO2 =  General Purpose Digital I/O
  • GPIO0 =  General Purpose Digital I/O
  • RX =  Receive Data.  Connects to RX on MCU
  • TX =  Transmit Data.  Connects to TX on MCU
  • CH_PD =  Enable / Power Down.  Must be pulled to 3.3V directly or via pull-up resistor to enable
  • RST =  Reset.  Active low, must be pulled to 3.3V directly or via pull-up resistor
  • VCC =  3.3V.  Can draw up to 200mA worse case.

Package Includes:
1x WIFI module ESP-01, ESP8266

Note: Product Images are shown for illustrative purposes only and may differ from the actual products.

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