Go Down

Topic: translate image via RF transmiter  (Read 2599 times) previous topic - next topic

alikamelkarnib

Hi all,can anybody help me about code for send image via RF transmitter using arduino uno or mega
and the image store in SD card  shield or memory interne in arduino

jremington

#1
Apr 07, 2016, 05:18 pm Last Edit: Apr 07, 2016, 05:20 pm by jremington
Send the image in the same way you send any data.

alikamelkarnib

how?if you can send the code please


jremington

#4
Apr 07, 2016, 10:35 pm Last Edit: Apr 07, 2016, 10:36 pm by jremington
Quote
how?if you can send the code please
The code would depend on the radio modules you are using. What are they?

allanhurst

Hi...

sending data over any radio link often incurs errors. I suggest you convolutionally encode it to transmit, then
 a Viterbi decoder at the receiver. Rate 1/2 should be good enough.  All digital mobile phone , microwave datalinks and satellite comms use this ( or variants of this ) error correcting technique. It isn't terribly difficult, though processing power  will be a limit to your data rate. I take it you're using simple fsk rather than various levels of QAM for transmit?

Your radio link may supply you with analog or digital signals. If analog you can improve the performance using a 'soft' decoding algorithm. 3 bits resolution is good enough.

regards

Allan.


if all this is gobbledegook, ignore and handle errors some other way -eg CRC with retransmit requests of limited size packets

alikamelkarnib

module RF-ASK-MODULE-WIRELESS-TRANSMITTER-RECEIVER-PAIR-433

jremington

Use VirtualWire. Start with the simple examples, and don't worry about the "end of life" notice. It works fine.

DrAzzy

Sending an image over that will be incredibly slow. You realize that, right?  Seconds or minutes per image.
ATTinyCore for x4/x5/x61/x7/x8/x41/1634/828/x313 megaTinyCore for the megaavr ATtinies - Board Manager:
http://drazzy.com/package_drazzy.com_index.json
ATtiny breakouts, mosfets, awesome prototyping board in my store http://tindie.com/stores/DrAzzy

Go Up