RFBitBanger

[F1BFU]

Hello Daniel

I have order the PCB from JLCPCB.
But I have the old versions. Does the project still have to move or is it already a stable version?
I am interested in the project because I am part of the emergency network in France.
We train to make transmissions in MFSK64 or 128 with FLDIGI.

73 QRO Gilles F1BFU ADRASSEC 79/FNRASEC

[profdc9]

I'm still working on it... please don't order it yet! It's very much a word in progress. I would be happy to accept any help to develop it. I just started it recently and got the hardware working. I am preparing the next version which fixes a lot of stuff. The radio is optimized to actually send/receive low bandwidth protocols directly with the arduino, not requiring a computer. It will support CW/RTTY and a new mode I am designing called SCAMP directly on the radio itself. The requirement to implement the digital signal processing directly on the Arduino results in some limitations of the protocols that can be implemented. But I'm always open to having my expectations surpassed. Dan

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On Sat, Jan 15, 2022 at 2:42 PM Gilles ***@***.***> wrote: Hello Daniel I have order the PCB from JLCPCB. But I have the old versions. Does the project still have to move or is it already a stable version? I am interested in the project because I am part of the emergency network in France. We train to make transmissions in MFSK64 or 128 with FLDIGI. 73 QRO Gilles F1BFU ADRASSEC 79/FNRASEC — Reply to this email directly, view it on GitHub <#1>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKFIJZFUUP2QNEVZBKCROWDUWHLZXANCNFSM5MBMU2DA> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[fermino]

Hi! I'm super interested in the project! What is the status of it? Is there any help needed? Thanks! :)

[profdc9]

You might consider joining the slack channel at the Open Research Institute ( http://www.openresearch.institute ). It is currently being offered as a kit by them for a donation. https://www.openresearch.institute/2023/08/08/rfbitbanger-kit-defcon31-show-special/ I am working on getting the project into the hands of those who have ordered the kit. I hope they will help provide feedback on the transceiver and help improve it. My main interest right now is to finalize the feature set and make the radio software and hardware robust. So if you can get your hands on a radio, whether you order it or build it yourself, using the radio and SCAMP and providing feedback would be valuable. 73, Dan KW4TI

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On Sun, Aug 20, 2023 at 6:21 PM Fermín Olaiz ***@***.***> wrote: Hi! I'm super interested in the project! What is the status of it? Is there any help needed? Thanks! :) — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKFIJZFRCYTIWHQD6CDGTW3XWKLWRANCNFSM5MBMU2DA> . You are receiving this because you commented.Message ID: ***@***.***>

[profdc9]

You can send an email to ***@***.*** to joint the slack channel.

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On Sun, Aug 20, 2023 at 6:21 PM Fermín Olaiz ***@***.***> wrote: Hi! I'm super interested in the project! What is the status of it? Is there any help needed? Thanks! :) — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKFIJZFRCYTIWHQD6CDGTW3XWKLWRANCNFSM5MBMU2DA> . You are receiving this because you commented.Message ID: ***@***.***>

[hello42world]

Question from a passerby: What would be the approximate range of this device when working in this text transmission SCAMP mode?

[profdc9]

Well, not to be evasive, but it depends a lot on band conditions. If we relate it to similar modes like FT8, then probably on the order of hundreds to thousands of km. The distance can depend very strongly on the time of the day and the state of the ionosphere between two stations. For a mode like FT8, often the goal is to make contacts, but not contacts in specific places at specific times, and SCAMP like FT8 should be able to accomplish that. If your goal is to reliably establish a connection between two particular stations at any time, this requires selecting a suitable band (especially given the time of day and season) and above all having a matched antenna as high as you can get it.

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On Thu, Aug 24, 2023 at 12:42 PM hello42world ***@***.***> wrote: Question from a passerby: What would be the approximate range of this device when working in this text transmission SCAMP mode? — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKFIJZHM5R2WFD5ZES3C4BLXW6HB3ANCNFSM5MBMU2DA> . You are receiving this because you commented.Message ID: ***@***.***>

[hello42world]

The use case I had in mind is a cheap two way pager for areas with poor/no cell coverage with a range of maybe up to a hundred km.
As someone who only knows how to turn on a walkie talkie I think I understood most of this with help from google.
Thank you!

[profdc9]

You should look up NVIS (Near Vertical Incident Skywave) for the kind of propagation suitable to your application.

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On Thu, Aug 24, 2023 at 1:37 PM hello42world ***@***.***> wrote: The use case I had in mind is a cheap two way pager for areas with poor/no cell coverage with a range of maybe up to a hundred km. As someone who only knows how to turn on a walkie talkie I think I understood most of this with help from google. Thank you! — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKFIJZF77TDJO256OACCZJTXW6NPHANCNFSM5MBMU2DA> . You are receiving this because you commented.Message ID: ***@***.***>

[FK8IH]

With my Hermes Lite 2 and an EFHW antenna I realized 15,000KM range QSO using FT8 mode on frequencies well fitted to the conditions of the day, currently high HF like 15 or 10M bands. No doubt a RFBitBanger can do marvels with SCAMP mode.