mqtt.config

[
	{sasl, [
			{sasl_error_logger, false},
			{utc_log, true}
	]},

%% log levels: debug, info, notice, warning, error, critical, alert, emergency, none
	{lager, [
    {error_logger_redirect, false},
    {log_root, "logs"},
    {handlers, [
      {lager_console_backend, [
         {level, debug},
         {formatter, lager_default_formatter},
         {formatter_config, [
            date," ",time, " [",severity,"] ", pid, " ", 
            {module, [module, ":"], [""]}, 
            {function, [function, ":"], [""]}, 
            {line, [line], [""]}, 
            {endtype, [" -", endtype, "- "], [" - "]}, 
            message, "\n"
         ]}
      ]},
      {lager_file_backend, [{file, "common.log.txt"}, {level, info}]}
    ]},
    {traces, [
    ]}
  ]},

	{mqtt_client, [
		{host, "localhost"}, 
		{port, 8080},
		{mqtt_protocol_ver, '3.1.1'}
	]},
	{mqtt_common, [
		{timeout, 103}
	]}
].