RE: MQTT data limit

dave — Wed, 02 Oct 2024 15:46:25 GMT

Thanks. You are correct we're using MQTT with TLS

I'm not familiar with the difference between the stacks and will do some research, but

Does the mbedTLS stack have a data limit?

Aside from the data limit are there any advantages / disadvantages to using one over the other?

I have a low power system and need an average current of 300 uA max if that makes a difference. In general we will be transmitting data about 10 times a day and may run over 2kB per message ( maybe not for every message, hard to know). We can chunk the data if necessary

Thanks!

RE: MQTT data limit

Hakon — Wed, 02 Oct 2024 09:17:37 GMT

Hello,

[quote user=""]Using ncs v2.7 on the nrf9160, is there a data limit using MQTT to communicate with Azure IoT Hub per message?[/quote]

I'm assuming you are using MQTT with TLS, and in that case there is a TLS buffer limit of 2 KB. This can be avoided by using the mbedtls stack instead of the modem lib TLS stack.