WF121 datasheet(21/41 Pages) ETC2

21 / 41 page

Bluegiga Technologies Oy

Page 21 of 41

Firmware

WF121 incorporates firmware which implements a full TCP/IP stack and Wi-Fi management. Exact features

will depend on the firmware version used. Please see the documentation of the firmware for exact details.

There are three main ways to use the module: Host controlled, script controlled or native application

controlled.

Host controlled means an external host is physically connected to the module and it sends simple commands

to the module and one of several different host interfaces can be used. The module provides high level APIs

for managing Wi-Fi as well as data connections. Bluegiga provides a thin API layer (BGLib) written in ANSI C

for the host which can take care of creating and parsing the messages sent over the transport. For evaluation

purposes GUI tools and a library for python are also provided.

BGAPI

802.2 LLC

802.11 MAC

UART / USB / SPI

Host

UDP

TCP

BGLib

(implements BGAPI)

Application

MLME

802.11 PHY

HTTP, FTP,

SMTP etc.

DHCP, TFTP,

DNS etc.

Figure 3: WF121 software

Data can be routed either through the API or through another physical interface. For example if the first UART

is used for sending and receiving command events, a TCP/IP socket can be bound to the second UART and

data written to the UART will seamlessly be passed to the TCP/IP socket. For information about the latest

capabilities of the firmware, please refer to the WF121 API reference documentation accompanying it.

The module can also be controlled by a script running on the module. This is especially useful for simple

applications as it eliminates the need for a host controller and can drastically cut development time. In

combination with a host it can also be used automate certain features such as the serial to TCP/IP

functionality described above.

Native application development is also possible as the stack will not require all of the available flash or

memory. Please see the material accompanying the firmware release about more details of this option.

WF121 Datasheet(PDF) 21 Page - List of Unclassifed Manufacturers