search

avbentem / airtime-calculator

Airtime calculator for LoRaWAN
https://avbentem.github.io/airtime-calculator
MIT License
47 stars 5 forks source link

airtime for eu433 #3

Open donsez opened 3 years ago

donsez commented 3 years ago

Could you add airtime for eu433 band (for sx1280 transceiver) ?

avbentem commented 3 years ago

https://www.thethingsnetwork.org/docs/lorawan/frequency-plans/#eu433 says it's not supported by The Things Network?

donsez commented 3 years ago

eu433 is supported by other LNS (chirpstack and TheThingsNetwork/lorawan-stack) see https://github.com/TheThingsNetwork/lorawan-stack/blob/c0e437afc7fccb9d506e05f73b4a2d2c3db54d13/pkg/band/eu_433.go

Erratum: sx1280 transceivers operate on 2.4GHz band.

avbentem commented 3 years ago

I guess you know that, for LoRaWAN, the time-on-air of a LoRa packet only depends on packet size and data rate (DR, being a combination of SF and bandwidth within a frequency plan). Quickly comparing page 26 for EU868 and page 43 for EU433 in the May 5th 2021 "RP2-1.0.3 LoRaWAN® Regional Parameters" seems to indicate that the definition for DR0..DR6 is the same for both EU868 and EU433. So, in terms of time-on-air, the existing configuration for EU868 can be used for EU433.

However, the calculator above all includes network-specific details, most notably the TTN fair access policy. As the TTN community network does not support EU433, and as the calculator so far only knows details about TTN, adding EU433 (or ISM2400) would feel a bit off topic right now. I'm not convinced yet that adding EU433 is a good idea.