Environment variables are used to control various aspects of the application. The following are currently defined:
SIOT_HTTP_PORT: http network port the SIOT server attaches to (default is 8080)
SIOT_DATA: directory where any data is stored
SIOT_AUTH_TOKEN: auth token used for NATS (and eventually HTTP device API), default is blank (no auth)
SIOT_NATS_PORT: Port to run NATS on (default is 4222 if not set)
SIOT_NATS_HTTP_PORT: Port to run NATS monitoring interface (default is 8222)
SIOT_NATS_SERVER: defaults to nats://localhost:4222
SIOT_NATS_TLS_CERT: points to TLS certificate file. If not set, TLS is not used.
SIOT_NATS_TLS_KEY: points to TLS certificate key
SIOT_NATS_TLS_TIMEOUT: Configure the TLS upgrade timeout. NATS defaults to a 0.5s timeout for TLS upgrade, but that is too short for some embedded systems that run on low end CPUs connected over cellular modems (we've see this process take as long as 4s). See NATS documentation for more information.
SIOT_PARTICLE_API_KEY: key used to fetch data from Particle.io devices running Simple IoT firmware