@szescstopni do you have anyone around who is brave enough to try and desolder the leds from the boards? No guarantee that is a solution as it may be part of another circuit but I have had success doing such things on various boards for power conservation reasons in the past. Sometimes all you need to do is cut a trace, no soldering iron involved.
@PlumpCat Apparently the producer knows about the issue and there's a command on their website that should switch the LEDs off, but it didn't work. I was thinking of cutting the wires too :)
Even further away from the gateways, RSSI -73, SNR 14. There will be no problem with measuring the level of water in a ditch nearby. Those #Dragino sensors work pretty well at first glance, but they were not made for wild areas – still haven't found a way to switch off the very bright LEDs that light up during transmission. We want to kep this place dark at night. And the LEDs use up the battery.