ikkeflikkeri
Posts: 3
Joined: Wed Jun 03, 2015 5:30 pm

RPi2 433 mhz receiver

Wed Jun 03, 2015 5:44 pm

Hello everone,

I have some trouble making my 433 mhz receiver work.
This is the one i bought: http://www.miniinthebox.com/433m-superr ... 91009.html
This is my setup: http://imgur.com/szFFg7m
(It is connected to 5V)

So to see what i am receiving I installed piscope, this is what i get: http://imgur.com/Ifj2fc5
Image
There is so much noise when im not sending anything.

Can someone help me? I really don't know how to fix this or what to do next.

My goal is to create a website to control the light at home.
The website shouldn't be a problem, but i'm not sure what to do with the receiver.

Kind regards

User avatar
joan
Posts: 14891
Joined: Thu Jul 05, 2012 5:09 pm
Location: UK

Re: RPi2 433 mhz receiver

Wed Jun 03, 2015 6:00 pm

There will be a lot of noise until a signal is actually being transmitted.

ikkeflikkeri
Posts: 3
Joined: Wed Jun 03, 2015 5:30 pm

Re: RPi2 433 mhz receiver

Wed Jun 03, 2015 7:02 pm

joan wrote:There will be a lot of noise until a signal is actually being transmitted.
So you are saying that is normal?
Do you know how i can read the signals? I haven't found a way that works.
My setup is correct, right?

Thanks for the feedback :)

User avatar
pi-anazazi
Posts: 716
Joined: Fri Feb 13, 2015 9:22 pm
Location: EU

Re: RPi2 433 mhz receiver

Fri Jun 05, 2015 6:01 am

This is one of the worst receivers and you have no antenna attached (little whole on bottom, solder in a 17.3 cm long piece of cable).

Have a look at pilight.org, there you can find details on how to built (or buy) a chip to suppress the noise from your receiver...

But if you (on the long run) only want to control some switches (with a sender ;-) ) you need the receiver only for "learning" from the remote control the correct command to flip the switch... No need to put too much effort into that.
Kind regards

anazazi

wernert
Posts: 10
Joined: Fri Jul 25, 2014 11:45 am
Location: New Zealand
Contact: Website

Re: RPi2 433 mhz receiver

Mon Jun 29, 2015 10:55 am

Hmmm.... This receiver is actually not too bad. Yes, there is a lot of noise while there is no signal, but as soon as a signal comes in it decodes it just fine. All these reciever modules do this, but it still works and from my experiments with it I was able to get reasonable range from it (pretty much cover my entire house and outside area).

I just recently spent quite a huge effort comparing all kinds of RF transmitters and receivers and eventually settled on a slightly upmarket one from the one you used, but the one you used is also not bad. I used these similiar RF devices to design quite a cool PCB called EasyPeasyPi. It has a transmitter, receiver, RGB LED, temperature sensor, buzzer en LED on it. But what makes it stand out is that I designed it work seemlessly with both Arduino and Raspberry Pi (including the Pi 2). I also included a large number of cool examples including source code for it which I will distribute with the project.

In case you are interested, I just started a crowdfunding campaign for this project on Ingiegogo. Please have a look on https://www.indiegogo.com/projects/easypeasy

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