We have just started using MQTT on our cr350 dataloggers to publish a data table to AWS every 5 minutes. In addition, the station state is published every 1 minute. The data is being published OK, and we can retreive it OK. We noticed a huge increase in cell data use. I monitored the MQTT state field on the datalogger and discovered that the TLS handshake is occurring on EVERY publish, and the MQTT session gets re-established each time. Has anyone solved a similar problem? Is there a setting somewhere to avoid this unnecessary TLS overhead?
This post is under review.
This post is under review.