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Publish MQTT from Lambda C++

0

Hi,

I developed a Lambda in C++ that publishes messages to MQTT using the IoTDataPlaneClient, however it takes 1 full second to send the first message, any subsequent messages (within the same request) take about 10 ms. Is there any way to improve the speed of this first message?

Topics
Internet of Things (IoT)ServerlessCompute
Tags
AWS IoT CoreAWS Lambda
Language
English
rePost-User-2247908
asked a year ago262 views
1 Answer
0

Hi,

For IoTDataPlaneClient within Lambda, if Lambda's are being reused, moving the instantiation of client outside of the main event handler can reduce subsequent calls. Then if the same Lambda is called again, that client can be reused.

What I haven't investigated is how the underlying client managed state, and if those parameters can be adjusted. The data plane client is making HTTP POSTs for the different operations such as Publish, so creating an HTTP persistent connection could be an approach to keep a connection pool open. Not a C++ expert, but I found this example that may help.

AWS
Gavin_A
answered a year ago
  • rePost-User-2247908
    a year ago

    Thanks for the reply,

    Would there be a way to maintain the connection across Lambda invocations?

  • Gavin_A
    a year ago

    Apologies, I misread this as a full MQTT connection (when I definitely saw the reference to IoTDataPlaneClient too! :) ). I've updated my answer with guidance on that.

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