[Feature Request] Increase payload size limit to 128 kB (same limit as IoT quota)

[davidallenmann]

Is the MQTT payload size limit 5kB?

I am trying to send 100 kB of audio data, and it is not practical to break that up into 20 messages that have to be reassembled on the backend.

Could you increase the payload size to the maximum payload size supported by IOT quotas?

[n9wxu]

Currently that will be a challenge due to RAM restrictions on the modules. The current protocol requires that the entire message be accepted/validated before processing. The 5kB limit is to reduce the incoming message buffer size. Increasing that message size to 100kB would be a significant fraction of the physical RAM in the current modules.