BR-SPY Common

Field name	Description	Type
`brspy.timestamp`	`Timestamp`	`Signed/Unsigned Numeric Value In Seconds`
`brspy.timestamp.raw`	`Timestamp Raw Value`	`Signed/Unsigned Numeric Raw Value`
`brspy.timestamp.s`	`Timestamp (Seconds)`	`Signed/Unsigned Numeric Value In Seconds`
`brspy`	`BR_SPY`	`No value (only supports checking if file exists or not)`
`brspy.direction`	`Direction`	`Signed/Unsigned Numeric Value`
`brspy.reception_port`	`Reception Port`	`Signed/Unsigned Numeric Value`
`brspy.extra`	`Extra`	`Unsigned Integer, 1 byte`
`brspy.length`	`Length`	`Unsigned Integer, 2 byte`
`brspy.crc`	`CRC`	`Unsigned Integer, 4 byte`
`brspy.transmission_port`	`Transmission Port`	`Signed/Unsigned Numeric Value`
`brspy.id`	`Message Id`	`Unsigned Integer, 1 byte`