Create rule that compares temperatures?

Developer Programs Rules API
1

Sorry maybe this is not the right topic but is it possible to make a rule if temperature outside is lower than inside than send a push notification. It cant be done with the app…

2

Not sure if you need an outside sensor, although it would be more accurate for sure, but the rule can compare values of temperatures, which can trigger a virtual switch to have an Alexa notification.
Smartthings push notifications cannot run in rules, one of the few disadvantages of rules compared to routines.

3

I’ve an outside temperature sensor so thats not a problem. But can you give me an example of the rule that compares two sensors with each other?

Austin described in a post above that you can look how automations look in JSON. So I looked up a rule with a notification in it. What if I copy that, will it work?

4

No, notifications cannot run in rules. As for copying, basically you need to paste the code in the rule brackets

{
“name”: "your rule name ",
“actions”: [
{ your code here }
]
}

and then you need to filter out metadata, principally “type” “” although sometimes there are others. That’s part of the learning curve, which is pretty easy - I’m no programmer and in a month I have a collection of rules. Find a decent online JSON formatter, there are many, I prefer

but maybe another community member with more experience would recommend another.
As for the rule you need, explain what you want to do exactly, and maybe a community member could help you as they’ve helped me.

2 Likes
5

You can use the location/temperature as a comparison…

                    {
                        "lessThan": {
                            "left": {
                                "location": {
                                    "attribute": "TemperatureF"
                                }
                            },
                            "right": {
                                "device": {
                                    "devices": [
                                        "your temp sensor device id"
                                    ],
                                    "component": "main",
                                    "capability": "temperatureMeasurement",
                                    "attribute": "temperature"
                                }
                            },
1 Like
6

If you look at the structure of Rules you can see that comparisons have a left and a right. @mrfitz98 has shown one where the left is the location temperature and the right a temperature sensor device. To compare two devices you simply make the left a device as well.

4 Likes
7

Thank you all for the explanation. I’ll try this tomorrow!