Wee Serial WIFI Module

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IM141118001 3.jpg

Wee is a WIFI module based on ESP8266 SoC. ESP8266 comes out of nowhere and has been taking by storm the IoT world. You can find many hacking projects about it on the internet. So far, the most popular ESP8266 breakout version only has GPIO0 and GPIO2 routed to the header. Compared to it, Wee WIFI module is designed with a standard Bee interface and has more GPIOs available for developers. In a word, users can take full use of the utility of ESP8266 SoC by using Wee WIFI module in your projects.

Go shopping Wee Serial WIFI Module


  • Standard Bee interface
  • indicators: TX, RX, PWR
  • FW/Work Switch
  • More GPIOs help developer take full use of the utility of ESP8266 SoC


PCB Size 23.9X26.2X1.6mm
Interface Bee interface
Indicators PWR,TX,RX

Electrical Characteristics

Characteristics Symbol Min Typ Max Unit
Power supply voltage VDD 3 3.3 3.5 V
High input voltage VIH 0.8XVDD - VDD V
Low input voltage VIL 0 - 0.2XVDD V
Operation current for VDD IDD - - 215 mA


IM141118001pic1.jpg IM141118001pic2.jpg IM141118001pic4.jpg


  • Work/FW Switch
When program firmware into ESP8266, you should ensure the switch is in FW mode.
For the normal usage of this module, you should ensure the switch is in work mode.

Pin Map

Pin Index Pin Name Description
1 3V3
2 TX
3 RX
4 -
5 RST# Enable wee module to reset in low level
6 -
7 FW Firmware enable pin*
8 -
9 -
10 GND
11 -
12 -
14 GPIO2
15 -
16 -
17 -
18 MTD0


  • Firmware enable pin
When set to 0, power or reset the wee module, you can access to the firmware uploading mode;
When set to 1, power or reset the wee module, you can access to the normal work mode

AT Commands

ESP8266 AT Test.png

Click the picture to zoom in


AT Commands--http://wiki.iteadstudio.com/ESP8266_Serial_WIFI_Module

How to upgrade ESP8266 firmware?

We use NodeMCU flasher here, the download links:

In this instruction, we will demonstrate the firmware upgrading by using Wee and Foca Pro.

  • Plug the Wee in Foca Pro, then make sure that the switch level is 3.3 V in Foca Pro and the Wee is in FW mode.


English Version: Please refer to the NodeMCU flasher user guide.

Chinese Version: Please see the guide below

  • Open the software, choose the right COM and click the button that is circled in the following picture. When a tick appears in the bottom-left corner, it suggests that the firmware upgrade successfully.

Upgrade Firmware.jpg

  • This software contains an existing firmware, but if you want to flash other ESP8266 firmware, please click the button that is circled in the following picture, and only two file path are available to choose.

Upgrade Firmware 1.jpg



Library-- https://github.com/itead/ITEADLIB_Arduino_WeeESP8266

Useful link

ESP8266 AT command test: http://blog.iteadstudio.com/wee-esp8266-start-guide-at-commands-test/

Firmware Update Tutorial: https://www.itead.cc/blog/esp8266-firmware-update-general-tutorial