So you need to investigate any local interferers and other close proximity RF users for the band…We are obviously commenting in the context of OP and thread subect - Europe! with local experience Have some prior customer history with India (again largely from smart metering perspective and there are a few gotchas IIRC). With lower urban deployment you ‘may’ find (2) less of an issue for your specific case, but in populous areas you may need to conduct RF surveys to determine actual situation and viability… again YMMV!
You also need to investigate the 433Mhz band limits wrt TX power in your area… again we have discussed in EU433 context vs any IN equivalent (IN865 & EU868 close enough for condideration of 1st order effects in this context).
But that didnt work if I recall - was on some of the early discussions where harmonization was proposed and discussed - I think they still carried on with dual deployments based on AU915 & AS923 options - 'cause many were already invested as you noted above and there is then reluctance to change… havent heard much on that lately as the group discussions collapsed to AU locals only with us remote parties dropped from the invites
Think for wider Indian Sub-Continent some EU433 options (but no predefined plans) - Bangladesh, Pakistan and (IIRC) Sri Lanka, but not India? - military considerations per other territories?
If you wish to rebut a comment it would be polite only to do so if the person was aware of the facts at hand.
Your topic opener said Europe. Someone provides high value technical advice and you dismiss it on the grounds you think it doesn’t apply on the basis of information you did not disclose.
It also begs the question why on earth you are interested in a channel plan that does not cover your jurisdiction. If you go and get permission from your authorities, ie they enact it in law, then please feel free to come back and request the channels to be included.
Under the right circumstances you do get longer distances using 433MHz, I use it for High Altitude Balloons, but it’s not on LoRaWAN. If you want to pursue LoRa P2P, this is not the forum for you and you will have to ask in-country if the frequencies are permissible.
Because of the differance butween the ERP limits, 10dBm @ 434Mhz and 14dBm @ 868Mhz, the range differance is small. A 434Mhz system would only go around 25% further.
And given that the 434Mhz band can have quite a lot of ‘interferance’ from other users, you might actually get less range, not more.
It would make sense to carry out real world tests, at the legal limits, of the actual achieved range differances, and not just assume the change is worth all the effort.
I have both systems in use. One for LoRa-APRS on 433 MHz, the other one on 868MHz for LoRaWAN. The antennas of the gateways are nearly on the same position.
I can confirm that there’s no significant difference in coverage between 433MHz with 14dBm (I am allowed to use more than 10 dBm) and 868MHz at 14dBm erp.
I was @sofia2019 who opened, and hasn’t commented since. @Piet_Pillay ‘contributed’, guess interested in same potential, but advice given, comparatives provided by others, real world is where rubber hits the road…. Or EM signals hit the atmosphere….so down to users to take advice, ignore or experiment for their own benefit/interest….we can but comment and put ideas forward
Yes, but remember\quote all of what what I said earlier, in most places you are limited to 10dBm on 434Mhz and 14dBm on 868Mhz, so the practical difference is only 2dBm, not 6dBm.
On air time doesn’t directly impact distance - indeed longer range comes from fact that the higher SF’s have more availability (time) for any given SF’s message ‘symbols’ to be seen. Shorter on air time means you might dodge a bursty interferer but you are not then on air for longer to allow symbol detection and correlation to happen against a general noise floor vs a bursty noise floor, swings and roundabouts! Whilst doubling with each step in SF there is a ladder effect and package sizes will generate a payload and SF induced staircase effect on timings - you need to look into the details but can see the kind of behaviour here (bottom of page) https://avbentem.github.io/airtime-calculator/ttn/eu868/13
As a general rule LoRa is able to recover data if <~ half of a symbol is lost, so quite rugged/resilient. Though actual perfromance is in part dependent on the nature of the interferer’s modulation scheme…
OK so for example 10dBm on 434Mhz will go around as far as 14dBm on 868Mhz and it appears the 868mhz is using more battery power.
But on 868Mhz you could cut the TX back to 10dBm, so same power consumption as the 434Mhz, but then use a gain antenna to get around the same range as the 434Mhz setup.
The question I guess we all want to know the answer to is what is the real reason for wanting a custom 434Mhz setup ?
Have some prior customer history with India (again largely from smart metering perspective and there are a few gotchas IIRC). With lower urban deployment you ‘may’ find (2) less of an issue for your specific case, but in populous areas you may need to conduct RF surveys to determine actual situation and viability… again YMMV!
military considerations per other territories?