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Hi

Apart from the preset's it is possible to set anything supported by the TI device. If NZ is anything like AUS then you need to be on a centre frequency slightly above 900Mhz but then google...

Hehehe, beat me to it.

There was a question of polarization, the chip antenna (when flat) is vertical (imagine XRF with wire whip being vertical). Having chip antennas in similar orientation will give the best reception.
...

Hi,

The antenna and the balun (small orange object with 6 legs) are both tuned to 868-915Mhz, outside this range they will both filter the signal considerably (so reduce range). There's a 433...

"What sort of deviations are being used by the XRF"

In the two lower data rates the deviation had to be increased, the rest remain the same as they have always been

For more detail on the...

Good to see that the TI chip betters the Hope in range even though the data sheet would make you think the opposite. There's nothing I've come across yet on the market to equal it's performance (we...

We do this type of thing day in day out. You can mix off the shelf battery powered sensors with home brew picaxe sensors. The XRF is really easy to connect to a Picaxe, see here for a quick idea....

Spencer just wrote a brief run down on how to wire the AXE401 kit in less than 2 mins to the latest generation of XRF which has 5v tollerant data lines. There's a blob of code to test the outcome and...

I have some experience of them too (not on AXE) but on an internet gateway that I designed. Did you also find a well folded paper plane would go further. I thought the RFM12B was poor till meeting...

Read the thread somewhat more, on an XRF you can pause communications whilst you go do something else. The device has it's own micro and memory so buffers until you wiggle a pin to "release" the data...

"These are usually front end modules with the registers addressed via SPI and need a microprocessor to add UART support"

This is what we insulate the user from with our radios as they have a built...

"As you say, the market is small, and apart from relativly expensive fixed frequency modules, I have yet to find a (cheap) frequency configuarable module covering the 144Mhz region. "

I think...

Why that specifically? not being an ISM band I doubt it would attract inetrest from major manufacturers, so with only a small potential market I'd expect solutions to be rather expensive and usually...

The new v1.5 XRF supports RSSI on pin 6 as a PWM output, a capacitor and read the resultant on a ADC will give you an easy way to see signal go up & down.

"On the topic of RF modules, apart from the Hope RF ones, are there any other modules out there where you can configure the frequency directly ?"

The XRF / URF / ERF and SRF all can be set in...

You really don't need to build anything custom electronics wise, it's as simple as connecting RX to TX and TX to RX (plus power) with those style of radios.

The RevEd AXE210 can be ordered with an...

We have just designed an adapter for the Pi that can take the same radio modules as the AXE210 kit which means you can send text to and from your RasPi and PICAXE

Would anyone be interested in me...

Why do I get the feeling you are a retired teacher?

Search and you will find my young apprentice as they say in the films, it's all there to be read on openmicros. You are free to call it trivial...

Now having more time to sit down and re-read the comment of g6ejd which says "suggest the 'protocol' needs to be considerably more advanced than the examples shown to prevent inadvertant or false...

@g6ejd - I giggled, thats the whole point of LLAP, it's supposed to be simple, just 3 rules with positive ACK's. Needs a reliable mechanism for getting the data there and back and over multiple...

@Goeytex

It's a TI product, the CC1120, not a semtech part

They say - "Featuring range significantly beyond 10-kilometers (139-dB link budget) and 65-dB adjacent channel rejection, typically 30...

Stan,

You mentioned earlier in the thread, complexity of pinout on the XRF. Could it be the small 2mm headers thats the show stopper (the very reason why we have other versions coming out with...

Sorry, yes you are right, I perhaps should have used the word PICAXE instead of micro.

You are right about needing to know the hottest (unless the conditions change upon location of each bearing)

On the gui side, I'd not have one, data log it and have 56 rules, if bearing A exceeds...

Serendipidously your wish is about to be launched, it's smaller than the XRF, has 2x3 standard pin header in a line, is tollerant of 5v data. Has onboard voltage reg so you can power it from even...