AWS Lambda not getting invoked when binary data posted in AWS IOT?

Question

I have configured a lambda to a IOT Rule. The MQTT topic will get binary data and on arrival of data the rule should invoke lambda.

The lambda gets invoked when I post normal JSON data, but if I post any binary data, the lambda does not get invoked.

But at the same time, I am able to consume the binary data posted to MQTT through my stand alone consumer and able to deserialise it successfully.

So what is that I am missing here ?

Deividi Silva · Accepted Answer · 2018-04-09 13:56:21Z

4

When the message payload should be handled as raw binary data (rather than a JSON object), you can use the * operator to refer to it in a SELECT clause.

Do this on your rule:

SELECT encode(*, 'base64') AS data, timestamp() AS ts FROM 'a/b'

This way it will get invoked.

https://docs.aws.amazon.com/iot/latest/developerguide/iot-sql-select.html

answered Apr 9, 2018 at 13:56

Deividi Silva

8468 silver badges14 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

shoki Over a year ago

I was previously using SELECT * from 'a/b', looks like even this query should have invoked the lambda as per documentation. I will give a try with the rule suggested by you.

shanewwarren Over a year ago

As a follow-up for anyone who can't this working, the following SELECT timestamp() AS ts, encode(*, 'base64') AS data FROM 'a/b' - does not work but.. SELECT encode(*, 'base64') AS data, timestamp() AS ts FROM 'a/b' - does. The base64 statement must come first.

puhlen Over a year ago

My data is already base64 encoded, this causes it to be double encoded. If it possible to receive raw base64 days without double encoding?

Shivakumar Sajjan Over a year ago

I am also trying the same thing. AWS lambda function should invoke when AWS IoT receives payload in binary. How does SELECT encode(*, 'base64') AS data, timestamp() AS ts FROM 'a/b' query trigger lambda function without calling AWS IoT core SQL aws_lambda function?

Collectives™ on Stack Overflow

AWS Lambda not getting invoked when binary data posted in AWS IOT?

1 Answer 1

4 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Related