LimeSDR
limemicro.com
LimeSDR
1–10 of 130 posts
Re: LimeSDR
#2Does anyone know of a solution that can go down to the 5khz range? Older (...and even newer) gym equipment uses the gymlink protocol for heart rate monitors instead of low power Bluetooth and friends, and very few monitors support it anymore. I wanted to try to make a converter but couldn't find anything to output in that frequency.
Re: LimeSDR
#3Does anyone know of a solution that can go down to the 5khz range? Older (...and even newer) gym equipment uses the gymlink protocol for heart rate monitors instead of low power Bluetooth and friends, and very few monitors support it anymore. I wanted to try to make a converter but couldn't find anything to output in that frequency.
I think it's pretty easy to make circuitry to shift a radio's frequency. If you did that with LimeSDR you'd still get the same bandwidth but it would be shifted into a different range.
Re: LimeSDR
#4Biden needs to be removed immediately.
He has murdered dozens of American citizens and was laughing about them yesterday.
Fucking evil piece of shit.
Re: LimeSDR
#5I haven't used a LimeSDR but I have used the mini version which is just about the same hardware minus the extra TX/RX channels. It's a great little device that covers a massive spectrum with a decent bandwidth as well. Comparable devices from Ettus are much more expensive. I'd love to own one for ham stuff but haven't had much time for that hobby lately. The Lime rep did give me a mini PCB on a keychain once, coolest trinket I've ever gotten at a conference.
Re: LimeSDR
#6Does anyone know of a solution that can go down to the 5khz range? Older (...and even newer) gym equipment uses the gymlink protocol for heart rate monitors instead of low power Bluetooth and friends, and very few monitors support it anymore. I wanted to try to make a converter but couldn't find anything to output in that frequency.
At 5000 Hz, you could probably just rig up a sound card with a mic input.
Re: LimeSDR
#7One of my concerns with using an SDR is that the FCC basically requires DRM[1]:
> ...importers and marketers should ensure that [two-way radios] are properly certified and labeled as FCC-compliant and cannot be easily modified to operate outside its grant of certification.
So if you use an SDR for LoRa, you have to make it hard for users to modify the code to emit a different frequency.
[1]: https://docs.fcc.gov/public/attachments/DA-18-980A1.pdf
Re: LimeSDR
#8Does anyone know of a solution that can go down to the 5khz range? Older (...and even newer) gym equipment uses the gymlink protocol for heart rate monitors instead of low power Bluetooth and friends, and very few monitors support it anymore. I wanted to try to make a converter but couldn't find anything to output in that frequency.
Ham It Plus can go upconvert as low as 300Hz, compatible with any SDR you just shift the frequency in software https://support.nooelec.com/hc/en-us/articles/360005812474
Re: LimeSDR
#9SDR is one of those technologies I still want to play with that I feel will open up this incredible new world to my curious mind. All of a sudden, the invisible waves around us that we often tangentially know about but never think about (because we can't see, smell, or hear them), become a whole sixth sense to explore.
I really hope for some free time to play with this, and to expose this invisible world to those around me (especially my kids), in a way that has been much less accessible in the past.
Even things like ceiling fan remotes, door sensors, wifi, a garage remote, a car key, ISS video feeds, data from stuff in SPACE, weather data, I mean, we're bombarded with it every day all the time and we just don't realize it.
Anyway, just had a wide-eyed moment, as I do every time I read about another thing that makes SDR just a bit easier to access.
Re: LimeSDR
#10One of my concerns with using an SDR is that the FCC basically requires DRM[1]: > ...importers and marketers should ensure that [two-way radios] are properly certified and labeled as FCC-compliant and cannot be easily modified to operate outside its grant of certification. So if you use an SDR for LoRa, you have to make it hard for users to modify the code to emit a different frequency. [1]: https://docs.fcc.gov/publ…
But this is a fully generic SDR. Can this even be certified as some consumer product?