Hey guys, I'm new to the forum to so apologies if I have posted in the wrong location.
I am currently undertaking a project for univeristy - classic - sending a balloon hig altitude. We are all Mechanical engineers, so we are focusing on the stability aspects of our design. However, we still need to find the device once we have achieved cut-down. This leads me to my question. I'm using an Arduino Mega 2560, radio NTX2 and a GPS Falcom FSA-03. I have no knowledge of programming and I am trying to get a grips on writting a code to send GPS coords back to base and also achieve a cut-down using a nichrome wire based on constraints on the location of the device as well as a max ceiling altitude. I have got snippets of code on the go, (eg the exmple using by Mikel Hart using his TinyGOS library) and snippets of RTTY stuff - but I am now completely stuck =( . Can anyone advise of any examples of code out there that may help? Indeed, any help at all would be appreciated
RTTY is quite old hat and you are only buying yourself a load of trouble using it. Better just transmit straight ASCII, it is simpler to send and receive.
Just treat the nichrome wire like any heavy current load with a FET driver. However make sure your battery will provide enough power for it in the low temperature it will find itself in when it comes to activate it. It is the power that is normally the limiting factor on these exercises.
Best of luck
With so much APRS gear out there, why in the world would you use RTTY?
RTTY is usually found in the HF bands where bandwidth is quite low. That's not an issue on 70cm. Even on HF, more modern modes like Domino seem to work better than RTTY.
IIRC, there are APRS trackers built around some Radiometrix modules, although I don't recall any details and don't know if they are compatible with the module you selected.
-j
The issue is that I have a limited timeframe and extremely limited knowledge on the subject. I have copied the set-up of a previously successful build and I have access to the receivers required (through university). At this point, any and all coding will be difficult for me, so I am just looking for a solution that will provide the easiest method of implementation as well as being to incorporate the skills (limited) of myself and a fellow from our Electronics dept. who has experience of RTTY (but probably has experience of other methods). RTTY came up upon suggestion of this guy and I followed blindly as I have no experience.
RTTY came up upon suggestion of this guy and I followed blindly as I have no experience.
OK you need to dump that idea as it adds unnecessary layers of complexity. The output of your GPS module is in ASCII so why not just transmit that?
I think we are using it because he wants to use dl-fldigi, which is, and I quote "Dl Fldigi is an adapted version of the free fldigi soundcard decoding software" - source: http://ukhas.org.uk/projects:dl-fldigi. Let's you put it through a laptop meaning you can be mobile if required. I don't know if there is any ASCII software available for free (budget constraints)
I used RTTY about 40 years ago, and it was old then. It is time to move on. The sound card section of that app is equally appropriate to ASCII as it is to RRTY, you are mixing up modulation and demodulation with the code you send on the top of it. I would strongly recommend you talk to someone who actually knows what century he is in.
Haha, harsh words but appropriate, I feel. I have been on the #IRC and spoke to some guys who have opened my eyes. I believe I will be having words with the electronics guy. In his defence I think it is more indicative of the teaching in his uni course than anything else
RTTY too old? That is like saying the wheel is outdated
APRS FM will never outperform balloon tracking on SSB @ low power (QRP).
CW is the oldest of them all...and the most reliable form of comms to date.
Jim,N2NXZ
CW is the oldest of them all...and the most reliable form of comms to date.
That is only because the human brain is part of the decoding process. The brain can make corrections on contextual information that is not possible using a computer.
I was not saying that RTTY was bad simply because it is old.
RTTY too old?
Yes, because of the protocol of bank switching on the character set. You only need to loose one shift character and the whole thing starts coming out as nonsense until you get the next one. The protocol is inherently not robust, and it severly biased towards the mechanical constrictions of the sender. That is why RYRY is such a standard test on RTTY, the mecanical constraints of print head rotation.
However it seems odd that you resurrect a three year old thread do pick a fight over.
Mike - G8HBR
Pick a fight????
How was I picking a fight by by my opinion regarding RTTY?
It is a good useful mode regardless what you think anyhow.
Old thread?
Probably because when most people looking for answers and help they instead get egg head know it alls that troll the forums to do nothing but the opposite.This Arduino forum has been polluted by nonsense and know it all nothings who sit and wait to to prove how much more intelligent they are to those who come for help.I bet you have nothing going on yourself except waiting like a jackal for the next poster...or mine for than matter.
I know the format...next is your buddies to run and aid your replies with brown nosing comments
You know so much,that is why your QRZ lookups are lower than your Arduino postings.
Lookups: 183
Theres your fight!
bet you have nothing going on yourself except waiting like a jackal for the next poster
Come on if you are going to be a troll then do your home work.
I have had two books published last year and am writing another two.
My website is full of tutorials to help beginners. It is full of projects that are rather unique.
Last year at the Rome Maker Fair I won a "Maker of merit" blue ribbon.
Look at the number of posts and Kama points, see many other people with more. (There is one actually)
Yes I call a 2011 an old post. And I call you a totally ignorant troll.
You know so much,that is why your QRZ lookups are lower than your Arduino postings.
Lookups: 183
I gave up ham radio 30 years ago mainly because of idiots like you. I did make the very first commercial RTTY to video converter in the U.K. back in 1975. Been there done that.
The face of a troll.
Thanks for the photo post.
Now you can post yours.Oh wait,,,you are on my shirt in the photo
You are calling me a troll when I was using this forum for good reason and to learn more about Arduino and my application for it.So looking into old posts is normal and expected considering I have only been using Arduino for a few weeks.Of course,there are no replies to a post where help is needed,only pounced upon for disagreement with your RTTY comment.Odd how a post where one needs help goes ignored...but here we are wasting time.
So I am done with you.Find someone else to hassle.