NeTV Main Page

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Welcome to the NeTV developer info page. NeTV is currently available as a development kit for use by developers, reviewers, and other people interested in evaluating the product. You can buy it at http://adafruit.com/products/609.

Beta Program: Beta users please see the NeTV beta program page for more info.

netv_insides_sm.jpg
(hi-res photo)

This page is intended for technical development use. If you are curious about the consumer facing features of NeTV, please see What is NeTV.

However, as far as developers and hackers are concerned, NeTV is a robust, wifi-enabled embedded linux computer that can connect to HD video sources and sinks. It has very strong potential applications in education, digital signage, smart energy, and low-cost computing.

Contents

Developing Software for NeTV

There are two categories of software development for NeTV.

One is firmware development. This includes the kernel, drivers, and application programs. If you are interested in writing C programs on embedded linux, then you should see the Firmware Development section.

The other is application development. This includes widgets, event generators, and android. If you are interested in creating user-facing applications written in javascript, HTML, and/or Dalvik (Android Java) then please see the Application Development section.

Configuring NeTV from the command line

Firmware Development

There are three methods for developing Firmware on NeTV.

Application Development

Please choose a category for application development:

Tricks

Various hacks you can do to NeTV.
See NeTV tricks

USB Ethernet support

The NeTV is powered by a 5V supply shaped like a Micro-USB connector. Conveniently, the board draws around 300-700 mA of current when running. This is only slightly above USB spec, so you should be able to power it entirely from a USB port on your computer. Note that running the board in this manner can cause HDMI voltage to droop below 4.5V, making them out of spec. Also, some systems will shut off power to a USB port that draws more than 500 mA. This mode is provided as a convenience only.

When booted, the NeTV configures the Micro-USB port to act as an Ethernet gadget. It will configure itself with the IP address 10.0.88.1, and runs a DHCP server that will offer your desktop computer the address 10.0.88.4. You'll need to install a driver in order to get it working.

With the network configured, you will be able to connect to the NeTV board through SSH:

ssh root@10.0.88.1

This will work even if the wifi is unconfigured, or if you start fiddling with NetworkManager. This is because the network subsystem completely ignores the usb0 interface.

The NeTV makes extensive use of syslog. It logs both to a local buffer (which you can read by running "logread"), as well as to the USB network on UDP port 6368. To capture these messages, install netcat (which should come with OS X and most Linux distributions) and run:

nc -l -u 6368

To verify logging is working, ssh into your NeTV unit and log a message to syslog:

logger "Hello, world!"

Kernel hacking


Mobile app development

Android app is available in Android Market at http://market.android.com/details?id=com.chumby.NeTV
The source code is posted on github at http://github.com/sutajiokousagi/netv-android

iOS app is under heavy development and yet to be submitted to AppStore.
However, the latest source code (unstable, usable) is posted on github at http://github.com/sutajiokousagi/netv-ios

Both platforms uses a combination of HTTP & UDP API documented above.

USB extension board

Add more USB ports to your NeTV.
See NeTV USB extension board

Motor controller board

Add digital IO, analog inputs, motor/servo control power to your NeTV.
See NeTV Motor controller board

Developing Hardware for NeTV

CAD

Hardware source for NeTV's PCB, mechanical design, breakout board, and FPGA can be browsed at http://sutajiokousagi.com/netv_hardware/ (please note CC3.0-BY-SA license)

FPGA

Details on developing for the FPGA, modifying the design, and programming the existing design can be found at NeTV FPGA architecture. Git repo with latest code is here: https://github.com/bunnie/netv-fpga

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