I realize it is somewhat counterintuitive as LoRa is not exactly built for high speed sending, but could it be feasible to get under a minute (ideally somewhere around 1 second) packet sending on a private gateway.
You can do all sorts of things with LoRa that you canât with LoRaWAN. We do LoRaWAN here âŚ
Do you mean sending one âpacketâ per second or even per minute, or somewhere in between.
Short answer, probably, if you are in the EU and are sending 10 bytes and are close to the gateway so you are on SF7, you can do it once every 6.2 seconds: https://avbentem.github.io/airtime-calculator/ttn/eu868/10. You can try other combinations for region & uplink size.
You canât actually change the speed, so letâs work with âvery frequentâ.
This assumes you have more than a private gateway - almost all gateways are private in that they arenât owned by TTN but by companies & individuals - but again, accuracy counts here, you may mean a private LoRaWAN instance - as in the server back end & all that goes with it.
But as with all these cryptic questions, the real answer(s) can only come from you providing some context - it may be you donât need to send that frequently or it may be that itâs just not suited to LoRaWAN.
(ideally somewhere around 1 second) packet sending
Such a question is off topic here, since this is most definitely not allowed by the TTN fair use policy.
In terms of what is legally permissible in your location, youâd have to research that yourself. Generally what you want to do is not allowed, but there may be some places where it can be done in particular air modes (especially using not just a fast SF, but a wider modulation bandwidth), though that likely forces a custom LoRa scheme rather than standard LoRaWAN.
Anyway, this is not a TTN or even normal LoRaWAN use case, so the question is off topic here. Chances are there are other radio technologies better suited to your need.
UHF LoRa can send at circa 60,000bps, which I would not refer to as âslowâ. 2.4Ghz LoRa is many times faster than that.
But difficult to see how that is relavent to TTN ?
Groan, now everyone is going to want to try and do it every 6.2sec!
Hitting every LOS gw within about 20km with LoRa spam, triggering them to start to allocate receiver/ demod resources, even if subsequent fails crc/mic check or message dropped at back end. There is no such thing, in this context, as private gw, private network or private anythingâŚit a broadcast technology and it works over a shared, scarce, precious, rf spectrum! FfsâŚ
@ksamuelsonâŚthink more like 6.2 minutes 
As Stated anything LoRa only off topic here, anything LoRaWAN is on topic if targeting TTN. If targeting TTN, FUP applies, above and beyond any legal limitsâŚ
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