Go to advanced search

by mcrossley
Wed Feb 06, 2013 10:42 am
Forum: Automation, sensing and robotics
Topic: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi
Replies: 193
Views: 72185

Re: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi

My soundcard OSC has a max sampling rate of 44kHz!

Is there are ready built SD card image with Panalyser incorporated anywhere?
by mcrossley
Wed Feb 06, 2013 10:00 am
Forum: Automation, sensing and robotics
Topic: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi
Replies: 193
Views: 72185

Re: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi

I will take a look, bear in mind, that this transmitter is faulty in some way...
by mcrossley
Tue Feb 05, 2013 11:02 pm
Forum: Automation, sensing and robotics
Topic: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi
Replies: 193
Views: 72185

Re: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi

The screen grab below shows SDI (Green) and SCK (Red), I haven't worked out the polarity yet, but it looks like the data is being sent on the SDI line?
scope.gif
scope.gif (47.15 KiB) Viewed 4821 times
This image shows the full data stream on SDI.
burst.gif
burst.gif (21.74 KiB) Viewed 4821 times
by mcrossley
Tue Feb 05, 2013 10:18 pm
Forum: Automation, sensing and robotics
Topic: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi
Replies: 193
Views: 72185

Re: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi

OK, the FSK line did pulse with DMM, but when I put the soundcard OSC on it that's all it was, a simple pulse. The SDI line does carry a data burst with each transmit, I have recorded one burst as a WAV file, the quality isn't brilliant but does anyone know of any software that will do logic analysi...
by mcrossley
Mon Feb 04, 2013 6:36 pm
Forum: Automation, sensing and robotics
Topic: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi
Replies: 193
Views: 72185

Re: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi

I was just composing a reply to my own message, it does go via the header, but you are correct the header doesn't seem to corresponds with to the RFM02 DIP layout. Odd, but it seems to be the same IC as the RFM02, I'll try the DMM later tonight...
by mcrossley
Mon Feb 04, 2013 1:44 pm
Forum: Automation, sensing and robotics
Topic: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi
Replies: 193
Views: 72185

Re: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi

Pin 16 goes straight to the MCU 'blob' - give me a week or two to get Panalyzer running! :lol:
by mcrossley
Sun Feb 03, 2013 2:10 pm
Forum: Automation, sensing and robotics
Topic: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi
Replies: 193
Views: 72185

Re: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi

Kevin

Following on from your blog page...

Here are some pictures of my 868MHz transmitter.
Front
Back

The RF chip is labelled Si4021 - A Silcon Labs FSK unit.

I haven't had a chance to take any pictures of the base unit yet.

Cheers
Mark
by mcrossley
Wed Jan 30, 2013 1:12 pm
Forum: Automation, sensing and robotics
Topic: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi
Replies: 193
Views: 72185

Re: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi

Oh, and the Fine Offsets all seem to use binary coded decimal for date/time when storing in the memory, if they use the same in the radio packets it should be pretty easy to spot.
by mcrossley
Wed Jan 30, 2013 1:03 pm
Forum: Automation, sensing and robotics
Topic: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi
Replies: 193
Views: 72185

Re: Fine Offset WH1081 (Maplin N96GY) sensors working on Pi

I did read somewhere that the DCF data was sent in a separate data packet once every minute. That may have been for the 30xx series of stations though.

Go to advanced search