Ask Brenda's Cat

This video shows three thresholds I have set for temperature, humidity and lux. The idea is to provide a warning system if the value exceeds the threshold. The next step is to design a step to give Green or Red status on all variables.

My Node Red Flow so far:

I have eliminated some major errors in this trial run. One was Alexa giving an "Object Object " error. I also need to trim the response to less than 10 decimal points. But I think I am on the right track. I only included the Freeboard dashboard to verify the response is correct. Next Steps: include a simple update that all data being measured is within a specified threshold. I would also make the Lux measurement more meaningful. i.e. are all the lights off ?

The first step was to wire the components in Node Red. I have two function nodes for each measurement to correctly extract the data for Alexa.

I used Freeboard to check if the response is correct or you can use the Debug node in node red. For those unfamiliar with Lux here's some info:

One lux is also the equivalent to 1 lumen spread over approximately 1 meter. A lumen is the measurement of the total amount of light that a source emits, such as a light bulb

Okay now for a trial run !