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ESP8266 WiFi Evaluation Board, Relay, Button, UEXT, GPIO US$11.50

ESP8266-EVB
ESP8266 WiFi Evaluation Board, Relay, Button, UEXT, GPIO


The ESP8266 is a small development board that includes a MOD-WIFI-ESP8266-DEV board in a socket, a 250V AC / 10A relay (RAS-0515), a button, a UEXT connector, and a 0.1″-pitch header connector with all ESP8266 signals.

The board must be powered by a regulated 5V supply via its 2.5mm barrel jack. Please see the Powering the Board notes below.

A strip of pin headers is included loose for you to solder to the GPIO header pads if desired.

The button has two uses. It's usually a general-purpose button, but if it's pressed during power up the ESP8266 will go into bootloader mode so you can upload new firmware to the chip. To upload code you will need any USB-to-serial 3.3V converter like the USB-SERIAL-CABLE-F (which you can add using the option checkbox at the bottom of this page). You can plug the leads of that cable into the appropriate UEXT pins of this board.

If you use the new Arduino IDE for ESP8266 released recently, with this board you can have an Arduino-driven WiFi device that is faster and cheaper than an official Arduino board by itself — which doesn't even have WiFi built in!

Espressif ESP8266 Features

The ESP8266 is very highly integrated SoC that includes an Xtensa LX106 core processor, RAM, and RF front-end allowing a WiFi TCP/IP stack to be implemented on board with just a few components. Since it found its way to the English-speaking world in the fall of 2014 it has attracted a lot of attention — there's even an Arduino IDE for it now. Its features include:
  • 802.11 b/g/n
  • Wi-Fi Direct (P2P), soft-AP
  • Integrated TCP/IP protocol stack
  • Integrated RF switch, balun, LNA, 24dBm 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 less than 10ľA
  • 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 less than 2ms
  • Standby power consumption of less than 1.0mW (DTIM3)
  • Integrated RISC processor, on-chip memory and external memory interfaces
  • Integrated MAC/baseband processors
  • Quality of Service management
  • I2S interface for high-fidelity audio applications
  • On-chip low-dropout linear regulators for all internal supplies
  • Proprietary spurious-free clock generation architecture
  • Integrated WEP, TKIP, AES, and WAPI engines

Add-on UEXT Modules Available

This board has a universal extension connector, UEXT, which allows you to add a peripheral module easily. The UEXT can provide I2C, RS232, SPI and power to the external device. Please see the UEXT Boards Category for a full list of modules that can plug into the UEXT port.

Powering the Board

This board does not have voltage regulation, so you must provide a regulated 5V DC supply. Our universal power supplies, available in the options below, do not have a 5V setting, so you also must use the voltage regulator board and the adapter cable listed beneath them, or provide your own means of supplying the board with exactly 5V.

ESP8266 Development Board Resources


Optional Recommended Products for this Item
USB-to-Serial Cable, 6 Female Header Wires, 3.3V I/O+ US$14.90
Power Supply 3-12V DC, U.S. plug, 6 connection tips+ US$11.00
Power Supply 3-12V DC, US/UK/Euro/AU Plugs, 100-240VAC+ US$13.00
Dual 5V/3.3V DC Regulator Board, 8-16V AC/DC Input (5V-3.3VReg)+ US$11.90
Power Supply Adapter Cable, Bare Wires to 2.5/5.5mm Barrel Plug+ US$0.85

This product was added to our catalog on Tuesday 27 January, 2015.

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