Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.



10647 posts

Uber Geek
+1 received by user: 377

Trusted
Subscriber

Topic # 112078 25-Nov-2012 20:31 Send private message

I got 2 sets of these, they are a reciver with LCD and 3 plug in transmitters - http://www.jaycar.co.nz/productView.asp?ID=MS6116 

Anyway, they are a totally irresponsible user of the 433MHz band with the way they work.

Every 6-7 seconds or so they transmit for a second, totally hogging the 433MHz band. To the point where my weather station sensors are not displaying most of the time, and it even takes a couple of trys to get other things to work. As my wireless IR repeater is also 433Mhz it means that most of the time is is blasting out a useless stream of data making remotes not operate too well.

I only just noticed this when I was trying to make another reciever for them to send the values out to cosm to get charted. They are transmitting any time the LED on the front is lit up. I thought that was just to show it was logging or something, not having close to a 20% duty cycle on its transmissions.




Richard rich.ms

Create new topic
2329 posts

Uber Geek
+1 received by user: 78


  Reply # 722703 25-Nov-2012 21:01 Send private message

Ouch! Do you have a SDR that you could use to see exactly what they're doing?



10647 posts

Uber Geek
+1 received by user: 377

Trusted
Subscriber

  Reply # 722716 25-Nov-2012 21:24 Send private message

No, but I have taken the output of my IR repeater into my soundcard to get a waveform. Its huge tho I will try soundclouding it, not sure how well it will work since I think they transcode it to something lossy.

http://soundcloud.com/user9568544/powermeter-grab

The IR remote repeater adds a 40ish kHz carrier to anything it recieves, the powermeter is right at the end, my rain gauge is what is on the other channel.

Looks trivial to decode but I have an issue that if I have my arduino connected to the computer it gets a massive amount of noise on the 433MHz reciever on it, and I cant find my bluetooth bee to connect wirelessly.

The end constant height bit is one of the transmissions from the wireless power meter. I am doing this out in the garage whcih is out of range of the ones in the house so there is some hope to monitor stuff in both locations, one with each set.




Richard rich.ms

Create new topic




Twitter »
Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:




News »

Trending now »
Hot discussions in our forums right now:

Geekzone giveaway: Thecus N2310 NAS
Created by freitasm, last reply by k14 on 24-Jul-2014 13:30 (63 replies)
Pages... 3 4 5


MH 17 "shot down" all dead
Created by joker97, last reply by joker97 on 24-Jul-2014 13:46 (198 replies)
Pages... 12 13 14


Is chorus going to deliberately slow adsl internet down
Created by rugrat, last reply by Detruire on 24-Jul-2014 13:44 (21 replies)
Pages... 2


Huge Fuss, didn't even make it a year.
Created by networkn, last reply by Glassboy on 22-Jul-2014 19:50 (121 replies)
Pages... 7 8 9


Skinny's new aggressive ad campaign
Created by Yabanize, last reply by Yabanize on 22-Jul-2014 23:35 (52 replies)
Pages... 2 3 4


PB Computers experiences
Created by KiwiNZ, last reply by KiwiNZ on 24-Jul-2014 13:18 (32 replies)
Pages... 2 3


Is working in IT making you less manly?
Created by dotnetdev, last reply by BTR on 24-Jul-2014 11:31 (32 replies)
Pages... 2 3


Dell Inspiron laptop replaced mobo
Created by ScuL, last reply by gzt on 24-Jul-2014 11:32 (11 replies)


Geekzone Live »
Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.