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The Timestamp contains the time the device wakes up by the cron (according to the internal clock). So all Uplinks from the same activation will have the same Timestamp and are easy to associate.
Structure of a payload Format 5:
Bytes | 0 | 1 . 2 . 3 . 4 . 5 | 6 ... | ... | ... | ... |
+---+-------------------+------------+------------+------------------+
Part | HD |timestamp | response 1 | response 2 | ... | response n |
Structure of a payload Format 4:
Bytes | 0 | 1 ... | ... | ... | ... |
+---+------------+------------+-----+------------+
Part | HD | response 1 | response 2 | ... | response n |
Response to Downlink (Port 4)
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