Pololu Wixel User Manual download pdf (Page 3)

Wixel programmable USB

wireless module.

Wixel programmable USB

wireless module enabling

wireless communication

between a PC and robot.

1. Overview

The Pololu Wixel is a general-purpose programmable module featuring a

2.4 GHz radio and USB. The Wixel is based around the CC2511F32

[http://focus.ti.com/docs/prod/folders/print/cc2511f32.html] microcontroller from

Texas Instruments, which has an integrated radio transceiver, 32 KB of flash

memory, 4 KB of RAM, and a full-speed USB interface. A total of 15

general-purpose I/O lines are available, including 6 analog inputs, and the

0.1" pin spacing makes the Wixel easy to use with breadboards

[http://www.pololu.com/category/28/solderless-breadboards] and perfboards.

We provide free, open-source apps for the Wixel that you can load and

configure with its built-in USB bootloader, turning it into whatever you need

for your current project. Simply download a different app to reuse the Wixel

in your next project.

Our Wireless Serial app turns a pair of Wixels into a wireless USB/TTL

serial link for communication between two microcontrollers or between a PC

and a microcontroller. This can be used, for example, for communication

between two robots or to remotely monitor a robot from a computer. A special

version of this app is designed for use with our Wixel shield for Arduino

[http://www.pololu.com/product/2500], which makes it easy to add wireless

capabilities (including wireless programmability) to an Arduino

[http://www.pololu.com/product/2191] or Arduino clone. Using an RF bit rate of

350 kbps, the serial app is capable of transmitting or receiving up to 10 KB of

data per second and can reach a range of approximately 50 feet (under typical

conditions indoors). Multiple serial links can be used simultaneously on

different channels. Detailed information about the wireless serial app is

available in Section 9.b.

Our USB-to-Serial app turns a single Wixel into a USB-to-TTL serial adapter that is capable of baud rates as high as

350,000 bps and supports four serial control signals. This app does not use the radio. Detailed information about this

app is available in Section 9.c.

Our I/O Repeater app allows you to wirelessly extend the reach of your microcontroller’s I/O lines up to 50 feet

using two or more Wixels. Detailed information about this app is available in Section 9.f.

We plan to release additional apps in the future for wireless AVR programming, wireless sensing, and more. You can

also write your own apps using the open-source Wixel SDK (see Section 10) and share them with the community.

Included Hardware

The Wixel is available in two versions:

The Partial Kit version [http://www.pololu.com/product/1337] comes with a 25×1 straight 0.1" male header strip

[http://www.pololu.com/product/965]. This version is ideal for compact installations and allows flexibility in choice of

connectors.

The Assembled version [http://www.pololu.com/product/1336] comes with its header pins soldered in, so it is ready to be

connected to your project with no soldering required.

1. Overview Page 3 of 64

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