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RF - Range - Antennas - RFM69 library
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868-915 mHz - which is it 869 or 915??
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Topic: 868-915 mHz - which is it 869 or 915?? (Read 1853 times)
HeneryH
Full Member
Posts: 229
868-915 mHz - which is it 869 or 915??
«
on:
November 04, 2018, 02:26:20 PM »
I'm confused by the mixed nomenclature. For instance, looking at antennas on DigiKey, I see one antenna that has 915mHz center freq then another that shows 868-915. Then on the LowPowerLab site, I see a lot of instances where the transceivers are listed as 868-915 without a choice to select which one.
This antenna is listed as 915mHz center -
https://www.digikey.com/product-detail/en/nearson-inc/S152AH-915S/730-1007-ND/1628302
This antenna is listed as 868MHz, 915MHz center -
https://www.digikey.com/product-detail/en/multi-tech-systems-inc/AN868-915A-10HRA/881-1242-ND/5246371
The LPL shop for buying Moteinos lists 868/915 for transceivers -
https://lowpowerlab.com/shop/product/99
But the dipole antenna says you need to trim the length depending on the freq -
https://lowpowerlab.com/shop/product/161
Can someone explain what is going on with the mix/match on 868 vs 915?
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sparky
Sr. Member
Posts: 296
Country:
Re: 868-915 mHz - which is it 869 or 915??
«
Reply #1 on:
November 04, 2018, 04:08:22 PM »
You select the freq. In your sketch.
//#define FREQUENCY RF69_433MHZ
//#define FREQUENCY RF69_868MHZ
//#define FREQUENCY RF69_915MHZ
«
Last Edit: November 04, 2018, 04:14:57 PM by sparky
»
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HeneryH
Full Member
Posts: 229
Re: 868-915 mHz - which is it 869 or 915??
«
Reply #2 on:
November 04, 2018, 04:17:54 PM »
So the hardware supports both equally (at least marginally) well?
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ssmall
Full Member
Posts: 158
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Re: 868-915 mHz - which is it 869 or 915??
«
Reply #3 on:
November 04, 2018, 07:56:57 PM »
A 915MHZ transceiver will work for 868MHZ as well but not 433MHZ. You need a 433MHZ transceiver for that frequency.
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LukaQ
Sr. Member
Posts: 302
Country:
Re: 868-915 mHz - which is it 869 or 915??
«
Reply #4 on:
November 05, 2018, 12:42:51 AM »
That is correct, there are only 3 modules, 315, 433 and 868/915. Last one you can use in either band
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http://www.classdaudio.eu
https://github.com/LukaGitH/Moteino
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LowPowerLab Forum
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Hardware support
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RF - Range - Antennas - RFM69 library
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868-915 mHz - which is it 869 or 915??