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Latest Cumulus MX release v3.0.0 build 3048 - 02 March 2019.
Legacy Cumulus 1 release v1.9.4 (build 1099) - 28 November 2014

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Search found 8 matches

by ksangeelee
Wed 26 Sep 2012 7:13 pm
Forum: Fine Offset/EasyWeather
Topic: The inside of the ws-1081
Replies: 121
Views: 104554

Re: The inside of the ws-1081

Personally, I don't have an RPi but as it appears you've posted the source code, perhaps someone else will be able to analyse some of the "other" protocols. The x080 models transmit the Radio Controlled Clock data as well, and the 308x models transmit solar data in a separate packet (with 60 second...
by ksangeelee
Wed 26 Sep 2012 12:23 am
Forum: Fine Offset/EasyWeather
Topic: The inside of the ws-1081
Replies: 121
Views: 104554

Re: The inside of the ws-1081

Work out the protocol for the wireless link between the units (has someone done this already?) Others have asked about this, but I'm not aware of anyone who has actually done it. I've created a receiver for my WH1081 (Maplin branded, 433MHz) using a Raspberry Pi. As part of the project, I had to fi...
by ksangeelee
Sat 07 Apr 2012 11:53 am
Forum: Homebuilt
Topic: Fed up with Fine Offset. I want to start from scratch?
Replies: 34
Views: 9934

Re: Fed up with Fine Offset. I want to start from scratch?

Hi Scott, I'm not sure that the RaspberryPie has much in the way of "I/O pins" and availablity is certainly an issue at the moment. It comes with a 26 pin header that provides GPIO (at least 8, as I recall), SPI, I2C, and UART, so there's quite a lot of connectivity. From the datasheet, it's also p...
by ksangeelee
Fri 06 Apr 2012 8:00 pm
Forum: Fine Offset/EasyWeather
Topic: Photos of the insides of Fine Offset sensors.
Replies: 147
Views: 127395

Re: Photos of the insides of Fine Offset sensors.

... thinking I can buy an inexpensive microprocessor board, a one-wire/USB converter, and write my own code to read wind and rain data. Add a one wire temperature and humidity sensor, and done. Give the microprocessor a USB wifi adapter, and now I have a sensor array data transmitted to my house wi...
by ksangeelee
Sun 27 Nov 2011 9:57 pm
Forum: Fine Offset/EasyWeather
Topic: Photos of the insides of Fine Offset sensors.
Replies: 147
Views: 127395

Re: Photos of the insides of Fine Offset sensors.

So in general, it would be much better to modify the receiver antenna. Cheers, Alan. That's earmarked for part 2, and I've got some 50ohm coax lying around that I can strip back and take vertically out of the receiver unit. Doing it in this order means I can tinker with the transmitter without havi...
by ksangeelee
Sun 27 Nov 2011 2:07 pm
Forum: Fine Offset/EasyWeather
Topic: Photos of the insides of Fine Offset sensors.
Replies: 147
Views: 127395

Re: Photos of the insides of Fine Offset sensors.

Thanks all, that starts to make sense.

So, to change to a monopole whip, I could remove the trimmer cap and connect a trimmer inductor in series with my 1/4 wave wire and tune by trial and error?
by ksangeelee
Sat 26 Nov 2011 11:23 am
Forum: Fine Offset/EasyWeather
Topic: Photos of the insides of Fine Offset sensors.
Replies: 147
Views: 127395

Re: Photos of the insides of Fine Offset sensors.

dpmiller wrote:the track that goes around the "L" cutout is the twig.
That was my initial thought, but I can't figure out why it would continue into the ground plane.

Also, that blue component that looks like an inductor actually has infinite resistance across it, whereas an inductor would have close to zero.
by ksangeelee
Fri 25 Nov 2011 11:30 pm
Forum: Fine Offset/EasyWeather
Topic: Photos of the insides of Fine Offset sensors.
Replies: 147
Views: 127395

Re: Photos of the insides of Fine Offset sensors.

I've attached a photo of the new DCF antenna position as well as both sides of the PCB for comparison with older units, and a labelled pinout for the solar pod cable. These images show the inside of my Maplin N96GY / WH-1081 transmitter circuit (433MHz) The red wire soldered to the board was added ...