Variables to set:
SPEEDFLUX_LOCATION tag for the db where the measurement is from (e.g. home)
SPEEDFLUX_USER influxdb user
SPEEDFLUX_PASS influxdb pass
SPEEDFLUX_PROTOCOL http or https
SPEEDFLUX_HOST database address (e.g. influxdb.example.com)
SPEEDFLUX_PORT port where influxdb is reachable
SPEEDFLUX_DB database or bucket where the data will be saved (has to exist already)