Get the last record from variable "water_level", prints it to the console, multiple the value by 2 and insert in a new variable called water_level_double.
Do your own modifications if you want.
Upload to TagoIO analysis, in the admin website.
Add the environment variable device_token with the device token of your choice.
Make sure you have npm and node installed in your machine.
Add the environment variable device_token with the device token of your choice, to the analysis configuration, in the admin website.
Open the analysis.js, change MY-ANALYSIS-TOKEN-HERE line for your analysis token.
Opens the terminal and run:
npm install
node .