Is Lora maximum transmission 1 km in real?
The claimed range for low-cost wireless gadgets often represents a triumph of marketing over engineering. The range may be achievable &quot;in free space&quot; with a clear line sight between two units, but not in the real world with structures, vegetation, interference, and the curvature of the earth intruding.
Since the transmit power and receiver sensitivity of the modules are fixed, and assuming you've already chosen the lowest data rate protocol, your best best is to use better antennas, and antenna siting, on one or both ends. Instead of a short piece of wire protruding from the device, use coaxial cable to connect an antenna that is outside, and mounted higher above the ground if possible. If your devices are at fixed locations, you can even use directional antennas. With 6 - 10 dB of antenna directional gain, you can extend the range by the factor or 2 to 3 that you are seeking. Search for &quot;800 MHz yagi antenna&quot; and you'll find several.