Casting Variables for I2C

I think I may have seen that in a loop somewhere in a post between Jun 12 and now... will be implementing it in the coming weeks.

Another arm of this project is sending this info to the Google Cloud, as part of this tutoroial, https://docs.particle.io/tutorials/integrations/google-cloud-platform/ Has anyone seen this error?
image

Ive been getting mixed results when googling the error, "0906D06C " It appears that my Datastore and Google cloud authentication was successful so I'm not quite sure what this error is referring to.
Thanks guys.