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Forum Want to ask about spectrum distribution of radio waves specifically for LoRa application
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Forum Thread Details
  • Replies 14 replies
  • Subscribers 218 subscribers
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  • lora
  • raspberry pi
  • iot
  • wireless_development
  • wireless
  • rf
Related

Want to ask about spectrum distribution of radio waves specifically for LoRa application

embeddedguy
embeddedguy over 2 years ago

Hi Everyone,

I have a Dragino LoRa module HaT which is compatible with RaspberryPi version 3 and older. I wanted to create a LoRa gateway(single channel) for personal use and evaluation how things work.

I saw that the HaT is compatible with frequencies as follows...

868 MHZ/433 MHZ/915 MHZ(Pre-configure in factory)

https://www.dragino.com/products/lora/item/106-lora-gps-hat.html

The region I am living right now(India) does not have 868MhZ as license free band and also not other two remaining frequencies supported by this shield. However here frequencies from 865 to 867MhZ are license free.

These has created confusion to me weather I could use this shield for my application. Some internet discussion also suggest that the module can be configured to 687 MhZ to be used.

Other suggest even that the 868 MhZ can also be used license free as channels are overlapping with 867 MhZ frequency. This has created confusion to me. It would be helpful to ask and get some insight how these frequency division works.?

On internet there are only a few key information but not details about how it distributed.

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  • charlieo21
    charlieo21 over 2 years ago +3
    It's license free since 2021. The use of low power equipment in the frequency band 865-868 MHz for short range devices_Exemption from License_Rules, 2021 | Department of Telecommunications | Ministry…
  • shabaz
    shabaz over 2 years ago +2
    Hi, If you can legally operate at 867 MHz then the board will work at 867 MHz, even though it says 868 MHz on it. That's because 868 is a loose term that actually includes channels at 867 MHz part of…
  • Gough Lui
    Gough Lui over 2 years ago +2
    Check with your local radio authority. This is very much country-dependent on the local laws and whatever licenses you hold. Just because certain bands are open for use in certain countries does not…
Parents
  • charlieo21
    charlieo21 over 2 years ago

    It's license free since 2021. 

    The use of low power equipment in the frequency band 865-868 MHz for short range devices_Exemption from License_Rules, 2021 | Department of Telecommunications | Ministry of Communication | Government of India (dot.gov.in)

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  • embeddedguy
    embeddedguy over 2 years ago in reply to charlieo21

    Thanks. That will make lot of work easy.

    BTW, how do you know that? just internet search or you have encountered same issue before?

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  • charlieo21
    charlieo21 over 2 years ago in reply to embeddedguy

    Just internet search. 

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  • embeddedguy
    embeddedguy over 2 years ago in reply to charlieo21

    Hi charlieo21 

    I was reading the document and found that it mentions that it's free to use 868 mhz for short-range communication distances such as RFID.

    I do not know what but LoRa is not short range such as RFID etc. Have you seen LoRa?

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  • charlieo21
    charlieo21 over 2 years ago in reply to embeddedguy

    There's nothing special about LoRa, if you're using it for personal use, you could use it without any issues if you operate under the limits. But as others mentioned before, you can tune it to use only the lower channels.

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  • charlieo21
    charlieo21 over 2 years ago in reply to embeddedguy

    There's nothing special about LoRa, if you're using it for personal use, you could use it without any issues if you operate under the limits. But as others mentioned before, you can tune it to use only the lower channels.

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