https://devzone.nordicsemi.com/f/nordic-q-a/118907/what-s-the-maximum-uplink-payload-in-nrf9160-to-the-cloudHi Nordic Asking this question to Nordic AI (right-down window), below was the answer. The nRF9160 is a cellular IoT device, and its MTU size depends on the protocol being used. For MQTT publishing, which is a common use case for IoT devices: en-USTelligent Community 13Mon, 17 Feb 2025 01:22:08 GMThttps://devzone.nordicsemi.com/thread/523156?ContentTypeID=1Mon, 17 Feb 2025 01:22:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c46965c2-763a-4f87-a631-4ff039f9629dMichal<p>Hello,</p> [quote user=""]<span style="font-family:inherit;font-size:inherit;">Q1. As AI said, MQTT TLS, max payload is 2KB.&nbsp; At ncs/mqtt sample, is there any way to increase max payload?&nbsp; &nbsp;If yes, how to do?</span>[/quote] <p>Since it&#39;s using TLS, there is no way to do that currently.</p> [quote user=""]<span style="font-family:inherit;font-size:inherit;">Q2. How about max payload for HTTPs protocol?&nbsp;<span>At ncs/https sample, is there any way to increase max payload?&nbsp; &nbsp;If yes, how to do?</span></span>[/quote] <p>Assuming HTTPS, you run into the same issue.</p> <p>Also, remember to count the MQTT/HTTPS headers etc. as part of the payload.</p> <p>Best regards,</p> <p>Michal</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/522944?ContentTypeID=1Thu, 13 Feb 2025 20:53:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:72e41e07-4e7b-437f-b888-b439d0aa2805Michal<p>Hello Jeff,</p> <p>I will find it out internally and will get back to you, likely during next week.</p> <p>Best regards,</p> <p>Michal</p><div style="clear:both;"></div>