How to read and Set the logic variables with HomeyScript?

Apps
1

Hi,

I am writing a script to set my screens on a certain percentage. Therefore I need to set/read the new 2.0 logic variables from Homey Script.

Does anybody know how to do this?

Kind regards,

Marcel

2

From this post onwards, there’s some discussion on how to set Logic variables.

3

Thanks!

4

Found this from google search and this is how I got variables to update:

const variables = await Homey.logic.getVariables()

console.log('variables', variables)
const id = "2df501f3-f1d7-4f40-bbba-6a8e29b51fee" // my variable id 
const dimLevel = await Homey.logic.getVariable({id: id})

const newLevel = dimLevel.value > 0.2 ? dimLevel.value - 0.2 : 0

await Homey.logic.updateVariable({id: dimLevel.id, variable: {value: newLevel}})
1 Like
5

If you want to look up a variable by name instead of id, you can use lodash like:

const vars = await Homey.logic.getVariables(); 
const myVar = _.find(vars, (o) => o.name === "Variable name");

log(`Changed switch is ${myVar.value}`)

await Homey.logic.updateVariable({id: myVar.id, variable: {value: "foo"}})
2 Likes
7

you really don’t need lodash to convert an object into an array so you can find a variable by a field property. you can just write:

const myVar = Object.values(await Homey.logic.getVariables()).find(({name}) => name === "Variable name");
8

But lodash.find() is faster :face_with_hand_over_mouth:

9

I really don’t think so:

The native array and object methods are almost always faster than Lodash, plus they require less memory.

10

benchmark says otherwise:

✔ lodash.find  5,137,273.76  ops/sec  ±2.87%  (96 runs)  fastest
✔ Array.find   3,212,320.51  ops/sec  ±2.05%  (96 runs)  -37.47%

âž” Fastest is lodash.find

Duh never mind, getVariables() returns an object, I tested incorrectly :sweat_smile: