RF receiver 433MHZ

[Hoagie]

HI,

I sometimes find a bit here and there comes through wrong too. The code always gets repeated quite a few times though, so I generally just live with it. I just put it down to the number of devices all trying to use the same frequency. With the error always being the first bit, maybe it's something in the receiver taking a bit too long to lock onto the signal.

Maybe you could try changing the threshold in the source code. Go too far and you'd risk getting 0s for some of the 1s though.

Cheers,
Geoff.

[d82k]

Dear Geoff,

thank you for your reply.
What about if I want to display the full bit received "10001000" for 0 and "10001110" for 1?
I have also tried to increase the length to have more than 24 but does not work...

This is because I also wish to interface it to my oregon scientific termomether (details of the decoded protocol here: http://wmrx00.sourceforge.net/Arduino/O ... tocols.pdf).

Thank you,
dk

[kitcope]

Hi,

I'm successfully capturing codes with a Java program using the Pi GPIO connected to a receiver. I'm using transition trigger call-backs from wiringPi via pi4J. The receiver is powered by the 3.3V output so is on all the time.

This works pretty well, usually capturing about 5 or 6 identical codes out of 20 to 30 sequences per transmission. These codes are also reproducible across runs.

However, it only works if you leave the program running a couple of seconds before attempting to capture a transmission. If you attempt to use it just after the program has started, numerous random noise events occur in the sequences which make them unusable.

Does anyone know why this might be?

Regards,

Chris

[d82k]

Hello Chris,
Which java program are you using? I'm interested in trying it too if possible
Thank you
dk

[txt3rob]

i would love to know the java program as well

[camillo75]

Hi I am making some tests using cheap 433 TX & RX; configuration is:

Sender: Arduino Due + 433 TX
Receiver: Raspberry PI + 433 RX

I am using these cool links:
http://ninjablocks.com/blogs/how-to/750 ... spberry-pi
http://ninjablocks.com/blogs/how-to/750 ... ur-arduino

Apart from range, it works!

My question is:
Do You know why for every send I am receiving the same message 4 times?
How do I discriminate and group the 4 messages to understand it is only one?

Thank you!

Best regards,
Camillo

[Bianco]

Do You know why for every send I am receiving the same message 4 times?

When I receive a message, I receive it between 1 and 4 times, yes.

Which brings my question:
I really don't know C so I don't get how RFSniffer etc. work. Has someone made these chinese RF modules work with Python?

[chorlton2080]

Can I make a suggestion that people try a different approach to control remote sockets?

I've found it easier to use the original socket remote and trigger the button contacts using opto-isolators connected to the GPIOs. I've had complete success with sockets and remote doorbells acting as audible alerts for my projects.

[xuw]

kitkopu,

Would you be so kind to share your Java working code for receiving the RF signals with pi4j ?

Thanks

[danicymru54]

There are some issues with the sniffer as it doesn't understand some of the protocols eg nexa protocol. Take a look at this site http://www.instructables.com/id/Super-S ... utomation/ and also some of the work I have done https://danicymru.wordpress.com/2016/12 ... -doorbell/.

[danicymru54]

Do You know why for every send I am receiving the same message 4 times?

When I receive a message, I receive it between 1 and 4 times, yes.

Which brings my question:
I really don't know C so I don't get how RFSniffer etc. work. Has someone made these chinese RF modules work with Python?

Check http://www.instructables.com/id/Super-S ... utomation/ and my own work in Python https://danicymru.wordpress.com/2016/12 ... -doorbell/

[Bianco]

Nice!

I did some work on my own as well: https://github.com/Nickduino/Pi-Somfy

[yu55]

I would like to connect the receiver to the raspberry pi to record 433 signals. Next step would be to read temperature from my old oregon scientific.

Hi
I'm using my Raspberry Pi to read 433 MHz transmissions from weather station for three years now. This is my project: https://github.com/yu55/auriol_reader - maybe it will help you to read data from Oregon (but I guess the protocol is different).
I used cheap chinese 433 MHz receivers but range was very small and many transmissions were corrupted. Then I changed receiver to AUREL RX-4MM5++/F and it's miles better!