timing differences between device messages and analytics messages

rafinewman

lets say trip of a vehicle ended on time 10:15:00 and the last device message of the trip (engine off) arrived and forwarded by the stream to my HTTP service on 10:15:02.
in addition, this device has some calculators that analyze the messages in order to generate some events/intervals via MQTT.

can i assume that analytics engine messages via MQTT will arrive to my service after 10:15:02 ?

is it the same when all messages (from device and from analytics engine) forwarded to my service via mqtt? (using topics)

dexif

It depends on many factors.
For example, in calcs you can find the update_delay parameter.
Streams send messages in batches as soon as they receive a response from the server that it is ready to accept a new batch.
The MQTT has its own queue for sending messages.
In addition, all these mechanisms depend on the network conditions and the willingness of the client side to receive messages.

You can find a useful scheme here for understanding flespi message flow.