[
 {kernel, [
  {logger_level, ${LOG_LEVEL}},
  {logger, [
    %% Console logger
    {handler, default, logger_std_h, #{formatter => {jsonformat, #{new_line => true,
                                                                   key_mapping => #{ level => severity,
                                                                                     report => message}}}}
    }
 ]}
]},

 {opentelemetry,
  [
   {resource, [{service, #{name => "hvac_iot"}}]},
   {span_processor, batch},
   {sampler, {otel_sampler_always_on, #{}}},
   {traces_exporter, otlp}
   %{traces_exporter, {otel_exporter_stdout, []}}
 ]},

"${CONFIG_ROOT}/app"].