General • Re: Need advice on sending image data from a Pi5 to several Picos

datagrams are limited to single packets (around 1500 byte).

UDP messages are limited to 65.507 bytes.
Advantage is that message handling is easy.

a protocol that can queue (and re-assemble) larger data packets, but without the overhead of TCP

TCP overhead is often overestimated. Opening a connection, send a byte and close is a waste of resources. But it is efficient if you send large amount of data or if you establish a connection and keep it open.
TCP provides a byte stream, so message handling is a bit more complicated. You have to track messages in th eapplication (which sounds more complicated than it is).

MQTT is meant for small data packets

MQTT uses TCP under the hood. "The MQTT protocol itself defines a MQTT PUBLISH payload size limit of 256MB. For a majority of the M2M and IoT scenarios this is a very high limit and most clients will probably never send a message with a payload which is that huge." /HiveMQ/
Advantage of MQTT is build in the message concept which makes it easy to use.

Statistics: Posted by ghp — Sat Jul 20, 2024 1:52 pm

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