I’d like to have a button or door sensor for my mailbox, to let me know when it’s been opened. Problem is, the mailbox is ca. 100 meters from the house, and not quite in direct line of sight, there is some terrain in between. Do you know any intermediate range hardware that could manage this? Or do I have to use LoRa or similar, which would likely make it more expensive and troublesome than it’s worth.
Radio region: Europe. It must handle humidity and temps from -20 to +35 C. Battery power or solar.
I understand it could be done e.g. by hooking an arduino up to a LoRa 1-way Tx/Rx kit, and that would be an interesting thing to make, but feels overkill price-wise. I can’t easily run a cable to it since it has to cross a road.