mqtt max speed

[kamacode]

Hello

I need to broadcast large amount of data on MQTT ~ 300K 

I require to send it as fast as possible

how can I best calibrate settings for maximal speed send via MQTT?

how can I test speed limit to the maximum? are there any relevant AT commands ? 

thank you 

[Heidi]

Hi!

Here are the relevant limitations with regard LTE-M and NB-IoT.

	LTE Cat M2	LTE Cat NB2
Downlink Peak Rate	~ 4 Mbit/s	127 kbit/s
Uplink Peak Rate	~ 7 Mbit/s	159 kbit/s

Source: Wikipedia 

We don't have any modem-specific AT commands to test this, but the Serial LTE Modem application has some MQTT-related proprietary AT commands.

But if you want to try posting as often as possible to test the maximum amount you should really write a small application that does this. The Simple MQTT sample is a good starting point here.