Search found 8 matches

by oden
Tue May 20, 2014 12:23 am
Forum: OpenLRSng hardware
Topic: Operating at 472 Mhz instead of 433 Mhz
Replies: 20
Views: 17473

Re: Operating at 472 Mhz instead of 433 Mhz

Have finally received some RFM23B 915Mhz units, it appears they can operate at a wider frequency then the RFM22B. Setting to 433Mhz seems to operate even when this is a 915Mhz unit, have confirmed this by the spectrum analyser detecting other devices on their correct frequencies. Mounting the RFM23B...
by oden
Mon Apr 21, 2014 9:38 am
Forum: OpenLRSng hardware
Topic: Operating at 472 Mhz instead of 433 Mhz
Replies: 20
Views: 17473

Re: Operating at 472 Mhz instead of 433 Mhz

Very interesting. I had given up on the idea of getting it running on 472Mhz as the 472 module is not available for small orders. Ended up ordered 2x RFM23B 1watt 915Mhz modules from Ebay, unfortunately these were the only units available as they have a different form factor so it won't be a simple ...
by oden
Fri Mar 21, 2014 1:57 pm
Forum: OpenLRSng hardware
Topic: Operating at 472 Mhz instead of 433 Mhz
Replies: 20
Views: 17473

Re: Operating at 472 Mhz instead of 433 Mhz

Ok the 470 Mhz is a 'custom' order from HopeRF, they don't normally manufacture them. They have a 'large' minimum order quantity, no point even asking what large is. your best bet would be to try and configure a 433MHz module up there Did test the 433 module with 470 frequency settings, it was just ...
by oden
Thu Mar 20, 2014 12:33 am
Forum: OpenLRSng hardware
Topic: Operating at 472 Mhz instead of 433 Mhz
Replies: 20
Views: 17473

Re: Operating at 472 Mhz instead of 433 Mhz

he RFM22 module is sold in 4 different versions depending on band THANK YOU! Did not pick up that massive point from the product manual. Makes perfect sense! :P Interesting that 470Mhz is not an option on the unit you have shown. providing you can find the one you want as it seems to only be stocke...
by oden
Mon Mar 17, 2014 5:57 am
Forum: OpenLRSng hardware
Topic: Operating at 472 Mhz instead of 433 Mhz
Replies: 20
Views: 17473

Re: Operating at 472 Mhz instead of 433 Mhz

Reading the documentation on transmitter module shows there is no hardware changes needed to support different frequencies (other then the antenna). The schematics from the Flytron site confirms no additional components are between the module and the antenna. Decided to test this out using the stock...
by oden
Thu Mar 06, 2014 3:34 am
Forum: OpenLRSng hardware
Topic: Operating at 472 Mhz instead of 433 Mhz
Replies: 20
Views: 17473

Re: Operating at 472 Mhz instead of 433 Mhz

So people have done this before for 868Mhz, are there any details on what hardware was needed to be changed. Should I troll though the commit history to see how made this code change and try to contact them? As you can see, it has a very wide frequency range So according to the website these units w...
by oden
Thu Mar 06, 2014 3:07 am
Forum: OpenLRSng hardware
Topic: Operating at 472 Mhz instead of 433 Mhz
Replies: 20
Views: 17473

Re: Operating at 472 Mhz instead of 433 Mhz

Rob Thomson wrote:Have you looked at the Rlink? By royal way?
No, i had not seen this product before your post. 410-510Mhz is the frequency range which is perfect for me but unfortunately the low power mode is 400mW which is way over the power limit. :roll:

Thanks for the suggestion
by oden
Tue Mar 04, 2014 11:56 pm
Forum: OpenLRSng hardware
Topic: Operating at 472 Mhz instead of 433 Mhz
Replies: 20
Views: 17473

Operating at 472 Mhz instead of 433 Mhz

In Australia we have laws that limit (unlicensed operators) the power output of 433Mhz transmitters to 25mw EIRP (means includes the gains from antenna). :evil: Wikipedia reference http://en.wikipedia.org/wiki/First-person_view_(radio_control)#Radio_frequency_use_for_video_transmission How every we ...

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