In search of hams that can program
Hi all, I hope this is the correct category to be posting this under.
I have been working on an APRS IGate for the past couple of months or so, based on the Netduino Plus board. This results in a very low power, and very small IGate. The only other requirements would be a radio and internet connection (even a slow one). The project is open source so I would like to invite anyone with programming and/or hardware skill to join in. I am far from professional so any help would be greatly appreciated. The end goal is to get this out there so other hams can build them, too. The more IGates there are in the system, the shorter the path required for those that are only interested in getting their packets onto the internet, therefore reducing APRS congestion. A kit may be offered but this is not intended to be a money-making venture.
I currently have a basic receive-only IGate up and running, with a TNC-style configuration interface over telnet. The "TNC" is based on Bob Ball, WB8WGA's PIC16F88 TNC, with very different software. It will be in the form of a "shield" for the Netduino board. The receive performance of this design is decent, but could be better, so I am currently looking for designs with better sensitivity. I also plan to make the IGate bidirectional, add selective digipeating, and add support for cellular modem shields for installations with no internet connection.
If you are interested, the code for the IGate and the TNC are posted here: https://github.com/ab0tj You can also email me at the email address on my QRZ callsign lookup page.
Thanks and 73!
Alex / AB0TJ
Sorry for the dumb question but can you explain what an IGate is or provide a link to a description? Last time I used APRS was probably 10+ years ago.
An IGate is an Internet Gateway where APRS packets are routed over the Internet to other gateways where packets can go back out onto the RF network.
Right now I am involved in too many other projects and really don't have APRS access or interest, to have time to sling any bits your way. Good luck!
Not necessarily back to other gateways, even though that is one function. The IGate's job 99% of the time is to route packets to the APRS-IS (internet) system so they can be mapped on sites like aprs.fi and findu. It can also take packets from the APRS-IS, such as APRS messages, and send them out onto RF.
I wish you the best of luck. Sounds like it'll be a neat one and I may tackle it myself at a later date.
I've currently got two projects in the works.
One is using the arduino and an Argentdata radio shield (N1VG) TNC, keyboard, LCD and radio to provide a simple APRS messaging interface.
The other is to take an old WRTSL54GS and some linux code to turn it into an igate. That project is on hold until I can procure a Linksys WRTSL54GS been tough finding one.
Electricity takes ALL paths to ground, not just the least resistive. -Guido
Thanks! I also have a wireless router based IGate (AB0TJ-5). It is a WRT54G running APRX and using a TNC-X. Works great, but I was planning on going even more compact this time.
Originally Posted by AC2EV
Maybe a Raspberry Pi would be a choice in the future? They are still a bit hard to get with a waiting period.