RF control issue .

i had these :

i lost the receiver and disassembled the transmitter and broke it , the thing is i found a little independent module hooked to the antenna . it's an SPI to RF module , so it must be controllable with arduino .

the thing is , i cannot buy a receiver like that one .because it's no longer available in my country , what i need is a method or a module to receive the data from the transmitter module , i just cannot figure how , due to me being an ignorant when it comes to radio transmission .

I am afraid you haven't figured out how to use this forum either. We do not mind read, we don't have magical powers to turn a small photo into a part number or datasheet, we use only the information you provide.

If you read the "how to use this forum" it tells you all this and more.

You will probably need to find the spi format.

Some have been hacked but not all.

Last i looked for instance the spektrum had not but some others had.

Mark , here is the PDF of the thing : http://radiolink.com.cn/doce/UploadFile/ProductFile/2015060561597109.pdf .

hey Board , thank you , the SPI format is not the problem here . the problem is with the reciever module , i cant find one .

i cannot buy a receiver like that one .because it's no longer available in my country

What country are you in ?

what i need is a method or a module to receive the data from the transmitter module , i just cannot figure how , due to me being an ignorant when it comes to radio transmission .

You can't make a spread spectrum receiver. If you can't find one you can't use it. Get a different transmitter, like 72 Mhz.

Spektrum make what is called a satellite, basically a spread spectrum reciever with spi output. he decoding is done separately.

Unlikely that different manufacturers are compatible though.

Orange is a popular cheap make.

Best to ask in the RC forums, someone there may know what is compatible with what.

Given that the cost of these modules can be high it is probably cheaper to buy a cheap tx RX pair.

I don't believe that is thef OP's transmitter because he said he "lost" his receiver. If he had any RC experinence he would know the don't sell transmitters with just one receiver. It's useless with only one receiver. I think he is trying to buil d an IED. This ims a continuation of another one of his posts asking how to "trigger" something from 3 km.

amine2: i had these :

it's an SPI to RF module , so it must be controllable with arduino .

Possibly but functions such as pairing of tx and rx will be built in , you would have to figure out the commands in spi to do that.

Some have been hacked, but if its a cheap one noone is likely to bother.

raschemmel: I don't believe that is thef OP's transmitter because he said he "lost" his receiver. If he had any RC experinence he would know the don't sell transmitters with just one receiver. It's useless with only one receiver. I think he is trying to buuld an IED.

Its actually more common than might be obvious.

Club shop regularly gets walk ins with similar requests.

Brand makes which the regulars use have available parts.

Fairly common to get 'expensive toys' for which spares are unavailable.

He's not trying to drive a servo. He's trying to send 1 bit.

raschemmel: He's not trying to drive a servo. jHe's trying to send 1 bit.

you have some very good memory sir . how on earth can you remember after all this time , yes i am not willing to drive servos , i am just transmitting little bytes of information over Radio , not for a Bomb though that i can promise you .

you have some very good memory sir . how on earth can you remember after all this time ? , yes i am not willing to drive servos , i am just transmitting little bytes of information over Radio

I have a memory like a steel trap. I am an electronics technician and have been remembering technical project details for 30 years.

i am just transmitting little bytes of information over Radio , not for a Bomb though that i can promise you .

Then for what ?

Why not tell us what you are trying to do ?

Bodging an old RC set may be something i would have tried 30 years ago due to cost.

For signalling to my shed i use ir.

I do not have a 3 KM garden though.

It's "km", not "KM"

i have a series of 7-segment displays hooked to an arduino and i want to send the data to it ,i just want to display a number 800meters away , the transmitter i already have can do that , though i can't figure the receiver part.

Good luck with that

You still haven't answered the question. What are you doing ? You gave an incomplete answer. What are you doing ? It sounds like a remote countdown timer.

raschemmel: Good luck with that

You still haven't answered the question. What are you doing ? You gave an incomplete answer. What are you doing ? It sounds like a remote countdown timer.

what does that have to do with the actual solution to the problem ? i am just sending numbers and i want to use my SPI to RF module but cannot find a way to receive the stuff . that's it man .

what does that have to do with the actual solution to the problem ? i am just sending numbers and i want to use my SPI to RF module but cannot find a way to receive the stuff . that's it man .

No that's not it , man. You are leaving out the part about why you are sending the numbers and why 800 meters ? (reduced from the original 3 km).

It has nothing to do with the solution. It has to do with our choice of whether or not to help you. The assistance offered by The Forum is a privilege, not a right. Right now I am challenging your reason for seeking our assistance. I think it's pretty obvious why I am asking, and it is starting to become obvious why you are not answering.

WHAT ARE YOU DOING ? WHY ARE YOU SENDING THE NUMBERS ?

And while we're on that subject why did you post this in October of 2015 ? (in THIS post)

so all i need , is to transmit a logic or analog state over a very long distance . something around 4km to 5km . like a high state or a low state ... or a voltage value . all the possibilities use pre-defined protocols . i want something from scratch . like it only transmits something very simple , like a voltage or a wave that i can later analyse

[u]Reply#16 of that post[/u]:

there are many buildings in the way .. and some high trees .. the RF systems are meant to carry bytes of information . all i need is one bit .

Believe it or not, it is OUR prerogative to ask this question when we suspect our assistance is being sought to accomplish some end we do not endorse or approve of. If you want our help, answer the question or go somewhere else.

"That's it, man."

amine2: i have a series of 7-segment displays hooked to an arduino and i want to send the data to it ,i just want to display a number 800meters away , the transmitter i already have can do that , though i can't figure the receiver part.

That requires somewhat more than one bit.

I took the time to read your previous posts. Your time stamp puts you in europe or west africa both areas of high alert.

I agree with Rchemmels comment.

I'm not convinced there are any 7-segment displays. I think that may be an attempt to mask the intent of the system because his last attempt at this raised too much suspicion when he said all he needed was one bit. That post ended with the OP changing the title to [SOLVED] , without explaining HOW it was solved , other than to say he used "some other modules". Why were there no details as to how it was "[SOLVED]" in Oct of 2015 ? The purpose of making these posts accessible to the public is for everyone to benefit from the information. To post for help, then claim you solved yourself, and not say how, is an affront to the rest of the forum who have been following the post and would want to know HOW it was solved. It is on a par with members posting until they get what they want and then not saying thank you, just disappearing. I have seen that before. You take the time to post some link that solves their post and then they just disappear without a word. Terminating a long post by changing the title to [SOLVED] with no explanation of how , is almost the same thing.

What raises a flag is that the OP did not want to answer the question of why he wants to send the numbers. This seems like an innocuous question. Most posters would reply "I don't know why it matters , but if you must know...the reason is ...etc" Why dodge it ? What is he hiding ? What is the project ?

Note: The OP's Local Time (from Profile) is GMT+ 1 hr.

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