The JSON interface is designed to be easy to implement for those developing new physics backend. It provides a plain text return to ArduPilot
with easily configurable fields. The interface uses UDP communication and is launched using
sim_vehichle.py -f JSON:127.0.0.1 or with the vehicle executable
--model json:127.0.0.1 where, if necessary,
127.0.0.1 is replaced by the IP of the machine where the physics backend is running.