I’ve been on AU915 more than anything, building nodes. I’ve just thrown up an AS923 GW (in .au so totally legit) and relearnt something I learnt…last year. I don’t understand why this is so though.
It looks to be a significant limitation of ABP (reinforcing the don’t use it message) that the default channels (2 for AS923, and 3 for EU868) are the only ones used in a standards compliant stack. This will surely cause congestion on those channels, which will hurt OTAA attempts too?
I get that OTAA gives the MAC downlink that gives the permissible channels…but are they not always the same (for TTN) so why doesn’t a stack using ABP just choose some a la the sub-bands in AU/US915 as a standard thing? Maybe it’s an AS1 vs AS2 thing for AS923? Or were the standards-folk imagining the server assigning any of the available frequencies based on it’s knowledge of the utilisation?
It would help me remember this difference if I understood the rationale for this soft channel config in the standard. It would also encourage me to switch to OTAA (and should be in the text for “don’t use ABP” everywhere too)
(from other forum entries and code it looks like a frequent request/solution is just to force set the frequencies, and TTN does use a fixed set. Perhaps that’ll evolve though?).