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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
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

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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.

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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 :)

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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


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Location: New Zealand
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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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