EU433 configuration about gateway-conf HOT 7 OPEN

@temporaryaccount

1. Center frequency
2. I think so yes cc @tftelkamp

from gateway-conf.

what is the difference between chan_multiSF_xxx and chan_Lora_std?

The chan_multiSF_xxx configures a 125kHz channel that demodulates all LoRa spreading factors. The chan_Lora_std usually configures a 250kHz channel that demodulates a fixed LoRa spreading factor. Then the chan_FSK configures a channel that demodulates FSK. A "full" config file configures 8 multiSF LoRa channels, one std LoRa channel and one FSK channel.

from gateway-conf.

Maybe @tftelkamp already has something in mind, but otherwise please make a proposal. The minimal channels are 433.175 433.375 433.575, then we'd have to come up with the extra 5 channels.

from gateway-conf.

Maybe these pieces of code (band_eu433.go, RegionEU433.c, RegionEU433.h) can provide some reference material, for example this function has the minimum and maximum frequencies:

static bool VerifyTxFreq( uint32_t freq )
{
    // Check radio driver support
    if( Radio.CheckRfFrequency( freq ) == false )
    {
        return false;
    }

    if( ( freq < 433175000 ) || ( freq > 434665000 ) )
    {
        return false;
    }
    return true;
}

This manual about setting up a 433MHz gateway has a configuration sample and as long as I can decipher it they offer to use these frequencies: 434.1, 434.3, 434.5, 434.7, 433.3, 433.5, 433.7, 433.9 at 125kHz (chan_multiSF_xxx), and 434.2 at 250kHz (chan_Lora_std) which is strange because they overlap and also the required 433.175 433.375 433.575 channels are missing.

By the way, what is the difference between chan_multiSF_xxx and chan_Lora_std?

Added later:
LoRaWAN Specification, section 7.4 EU 433MHz ISM Band.

from gateway-conf.

I couldn't find any official documentation about the additional channels for EU433, so I'm trying to allocate the frequencies by myself. I have two questions though:

1. When we define a channel, for example 433.175 with 125kHz bandwidth, is it the "left" frequency or the "central frequency"? In other words, does it mean the channel will occupy the 433.175-433.300 frequencies, or the 433.1125-433.2375 frequencies?

2. We can see in EU-global_conf.json that both chan_Lora_std (250kHz) and chan_multiSF_1 (125kHz) are using the same 868.3MHz channel, how is it possible? Is it because they are using different spreading factors so they can use the same frequencies?

Thank you.

from gateway-conf.

TODO:

• Inventorise the 433MHz ISM/license free/SDR bands across the world.
• Using the proposed EU433 channels, try and find as many overlapping channels as possible.

Because 433MHz is quite a standard ISM band internationally, this is the ideal band to try and find at least one standard channel that will work everywhere. If a device joins on that channel(s), they are guaranteed to be heard as long as there is a 433MHz gateway in range.

from gateway-conf.

https://net868.ru/assets/pdf/LoRaWAN-Regional-Parameters-v1.1rA.PDF

from gateway-conf.