NW Digital Radio Blog page 9

News from DCC in Austin

Basil has the complete AX25 stack bolted to the transmitter. Proto 3 was shown tossing 9600 APRS packets to a Yaesu VX-8 at DCC in Austin. This includes the socket interface with support for IPV4 and V6.

We are now doing compatibility testing with commonly deployed 9600 TNCs. We don’t anticipate any issues with any properly functioning TNC, this is just a verification list:

  • Kantronics 9612 plus
  • Timewave PK96
  • Yaesu VX-8
  • Kenwood D710

Dennis has a non-coherent receiver working (it actually does FM Voice) which is the front end for the decoder. He is also working on a coherent receiver for higher speed modems which will give us an additional few dB.

We will provide another update after Pacificon in a few weeks.

Keep the Faith,
Bryan

UDRX Proto 3 has arrived

6 Units of the third, and hopefully final, UDRX prototype have arrived and passed power-up. We’ll release a complete project up-date at the TAPR/ARRL Digital Communications Conference in Austin TX on September 6th.

Hope to see many of you there,
Bryan – K7UDR

udrx-3

Customs Declaration

To our International Customers:

We all like to save money and don’t always agree with our Government’s Tax Policy.

But please, don’t ask us to falsify the customs declaration on your order.

Thanks,
Bryan K7UDR

Adding a Display to AMBEServer

An AMBEServer provides a great platform for supporting applications like DummyRepeater, which need a platform to convert audio to AMBE and back again.

In previous blog posts we have discussed using the AMBEServer with DummyRepeater, but have always used a display on another computer or HDMI monitor to accomplish this task.

I decided I would like to see if I could get a Raspberry Pi display attached to an AMBEServer for user interaction without the need for a remote computer display or HDMI connected monitor.

I decided to try the Adafruit Pi TFT as a display.  Here are the early results.  After receiving the PiTFT, I followed the assembly instructions and software install instructions. I used the deb file method rather than loading a new image.

The display came right up.  Here are the results.

adafruit-tft-crop

DummyRepeater display on PiTFT

 

Stacked DV3000 and PiTFT on Raspberry Pi

Stacked DV3000 and PiTFT on Raspberry Pi

 

End view of DV3000 and PiTFT on Raspberry Pi -- Need supports

End view of DV3000 and PiTFT on Raspberry Pi 

 

As you can see this all stacks up nicely, I just need to come up with a support and a case to hold it all!

The current UI isn’t optimized for the 320×240 display yet, but as you can see the touch PTT/Transmit button is clearly visible and the TFT touch function of the board works.  The board also supports 4 buttons that UI designers could use for a menu operated or similar system.  Additionally, adding a USB or Bluetooth keyboard and mouse are supported.

 

DV3000 in Japan – Portable DummyRepeater

Note from our new friend Satoru, JA1SCW, on Olive Island in Japan
PortableDR

Portable DummyRepeater

Since I started D-Star about two years ago, I have been looking for a solution for a portable rig like the photo which consists of Raspberry Pi, DV3000, sound card, software, WiFi, battery and smartphone. You may use them as a friend of your daily exercise, walking!!I made hotspots and node adapters in total six to seven sets, but this is the very first ever set which is capable for accessing the networks supported by ircDDBgateway software. At this moment of time, only remaining issue is PTT as I prefer PTTing by using a speaker-mic rather than hitting a PTT button on a smartphone screen.I will be soon 70 years young! hi This requires skills for a soldering and programming but hope everybody could overcome difficulties you may be faced to. Thanks to a great product, DV3000 and people contributed for launching it.Very best 73s,  JA1SCW@ Olive Island in JapanThanks,  Satoru (Radio Name: Steve)

Update

GPIO PTT

Photo of Portable DummyRepeater w/PTT

Based on information from G8BPQ, Saturo was able to simplify the Portable DummyRepeater and remove the external USB hub which supported a serial connector to get PTT.  Now his PTT goes directly to Pin 3 on the Raspberry Pi.

DummyRepeaterDV3000-2

Block Diagram

 

DR-DV3000

Portable Dummy Repeater with DV3000

DV3000 Analog to D-STAR Bridge

VK5ZEA, Michael, of Port Lincoln, Australia treats us to another of his wonderful YouTube videos.

Using a Raspberry Pi, DMK URI, DummyRepeater and analog radio, Michael demonstrates bridging analog FM and D-STAR.

International Shipping

I did a quick check today on our International Shipments via the US Postal Service.  Here are the results:

DELIVERED:

  • Australia
  • Canada
  • France
  • Netherlands
  • Poland
  • Spain
  • Switzerland
  • United Kingdom

HELD FOR PAYMENT:

  • Germany

STILL IN PROCESS:

  • Belgium
  • Ireland
  • Italy
  • Japan
  • Norway
  • Russia
  • Ukraine

DV3000 Back in Stock

We have have received another batch of 100 and all back-orders have been filled leaving about 70 in stock.

We’re working on some app notes as well.

Well that was quick …

The first 100 DV3000s are sold at the intro sale price and have been shipped to 10 different countries. We have started a new build cycle and are accepting back-orders. We intend to maintain units in stock after that.

Thanks for getting this off to a great start!

Preparing the Raspberry Pi for DV3000 Applications

See the basic installation instructions for the DV3000 and the dv3000d daemon in the document DV3000 – AMBEServer

Note: All production DV3000 units are configured for 230400 bps and do not have jumpers. 115200 bps is insufficient, but the board can be easily modified to add jumpers to configure baud rate, see the schematic at in the datasheet.

The dv3000d is the basic building block for the first set of applications for the DV3000.  It is a server which receives PCM audio over a UDP socket and returns AMBE or receives AMBE and returns audio.

DummyRepeater from the Yahoo! pcrepeatercontroller forum can access the daemon either locally or over a UDP/IP link. DummyRepeater in conjunction with ircDDBGateway will allow you to link to reflectors and repeaters around the world.  See notes.

You will also find utilities to convert between ‘wav’ and ‘dvtool’ or ‘ambe’ files in the ircDDBGateway file AMBETools.