A laser rangefinder module is one of the easiest long-range sensors to wire up and one of the easiest to misread. The wiring is four wires. The mistakes happen in the protocol: a frame header you skip, a checksum you do not verify, a unit you assume.
Source: [Dev.to](https://dev.to/erdilrf_tommy/reading-a-2-km-laser-rangefinder-module-over-uart-with-python-lr2000e2-55-aa-protocol-3jaj)