Thanks for the link to the discussion of 6PACK and FlexNet. I recall reading mentions of them "back in the day" but that thread gave a good explanation of both. I continued to read the thread and Brian, N2KGC, gives some very good advice in message #287 (https://groups.io/g/EastNetPacket/message/287) that those new to amateur radio data networks will need to heed or they will be plagued by the Hidden Transmitter Syndrome that was so prevalent in the packet heyday (but we had an excuse--TNCs and radios were EXPENSIVE so we threw it up on the nearest grain elevator and hoped for the best). TARPN's use of dedicated links between stations is the most solid way to avoid this, a repeater being a close second, I suspect (I never had the opportunity to run packet through a repeater).
This where an entity like the Amateur Radio Standards Organization conceptualized in ZR 0079 would be useful as clearing house for best practices from the world over. Things like understanding Hidden Transmitter Syndrome need to be part of Amateur Radio Networking 101 otherwise the same mistakes will be made but these days with all of the very low cost hardware and free software at our disposal there is little excuse but to do Amateur Radio Networking right.
Nate - It's certainly no substitute for "ARSO", but there's a Zero Retries Guide to Amateur Radio Networking (in the current century) in the queue for 2023. Hidden Transmitter Syndrome will be an entire chapter.
Yep, I went to buy a Mobilinkd TNC a few weeks ago and discovered that the TNC3 was sold out and they were going to come out with the TNC4. This promises to be a great platform, looking forward to it!
Regarding your Decoding failures, it might be a problem with activated auto gain control and or noise cancellation on your phone and you need to play with the settings. Hopefully the manual for Assempix will help you figure some things out:
Thanks for the link to the discussion of 6PACK and FlexNet. I recall reading mentions of them "back in the day" but that thread gave a good explanation of both. I continued to read the thread and Brian, N2KGC, gives some very good advice in message #287 (https://groups.io/g/EastNetPacket/message/287) that those new to amateur radio data networks will need to heed or they will be plagued by the Hidden Transmitter Syndrome that was so prevalent in the packet heyday (but we had an excuse--TNCs and radios were EXPENSIVE so we threw it up on the nearest grain elevator and hoped for the best). TARPN's use of dedicated links between stations is the most solid way to avoid this, a repeater being a close second, I suspect (I never had the opportunity to run packet through a repeater).
This where an entity like the Amateur Radio Standards Organization conceptualized in ZR 0079 would be useful as clearing house for best practices from the world over. Things like understanding Hidden Transmitter Syndrome need to be part of Amateur Radio Networking 101 otherwise the same mistakes will be made but these days with all of the very low cost hardware and free software at our disposal there is little excuse but to do Amateur Radio Networking right.
Nate - It's certainly no substitute for "ARSO", but there's a Zero Retries Guide to Amateur Radio Networking (in the current century) in the queue for 2023. Hidden Transmitter Syndrome will be an entire chapter.
Yep, I went to buy a Mobilinkd TNC a few weeks ago and discovered that the TNC3 was sold out and they were going to come out with the TNC4. This promises to be a great platform, looking forward to it!
Tom - One great feature for the Mobilinkd TNC4 will be its ability to experiment with M17, so yeah, I'm looking forward to it also.
This comment seems to break down how the Rattlegram/Ribbit source is organized: https://github.com/aicodix/code/issues/1
TW - Thanks! Will mention that in Zero Retries 0081. For posterity:
If you are interested in the modem used for Rattlegram, here you go:
https://github.com/aicodix/modem/tree/short
We have a Reddit community about the COFDMTV technology used in the modem:
https://www.reddit.com/r/COFDMTV/
And there is also the COFDMTV website on our homepage:
https://www.aicodix.de/cofdmtv/
Regarding your Decoding failures, it might be a problem with activated auto gain control and or noise cancellation on your phone and you need to play with the settings. Hopefully the manual for Assempix will help you figure some things out:
https://www.aicodix.de/cofdmtv/assempix/
The source code for the Android app Rattlegram will not be available for the moment.