When 1 temp sensor is the same as 1 other turn something off

General Discussion
1

I have two temp sensors one Zigbee and one mqtt ,I want a routine to turn something off when the mqtt sensor is at the same temperature as the ZigBee one .

any help would be great .

thanks

martin

2

The following driver written by @Mariano_Colmenarejo does math. You need to use API Rules to put the data into the edge device it installs

Screenshot_20260620-093315
Screenshot_20260620-093315864×861 88.9 KB

3

thanks

martin

4

You can also try this example Rules API rule

5

The app Routines don’t have a condition to handle that. I can see why they might not want to support one.

You can do it easily enough using the Rules API with a Rule such as:

{
    "name": "Turn off a device if two temperature sensors have the same reading",
    "actions": [
        {
            "if": {
                "equals": {
                    "left": {
                        "device": {
                            "devices": [
                                "187814ee-eeed-4e9a-ae32-4c8e99e027d4"
                            ],
                            "component": "main",
                            "capability": "temperatureMeasurement",
                            "attribute": "temperature"
                        }
                    },
                    "right": {
                        "device": {
                            "devices": [
                                "625ab66e-b632-4c55-89dc-cd52993afa2c"
                            ],
                            "component": "main",
                            "capability": "temperatureMeasurement",
                            "attribute": "temperature"
                        }
                    }
                },
                "then": [
                    {
                        "command": {
                            "devices": [
                                "b7db0d43-dee3-4974-bd47-db34438aa814"
                            ],
                            "commands": [
                                {
                                    "component": "main",
                                    "capability": "switch",
                                    "command": "off"
                                }
                            ]
                        }
                    }
                ]
            }
        }
    ]
}
6

Have you tested this rule?

Does the Rules API handle temperature values ​​with one decimal place?

(TIMMERFLOTTE 2)> emitting event: {"attribute_id":"temperature","capability_id":"temperatureMeasurement","component_id":"main","state":{"unit":"C","value":25.36}}

My Timmerflotte is emitting temperature values using two desimals.

7

Only with single decimal place temperature attributes this afternoon. With the typical home sensor only being accurate to 0.2 C, and the reporting sometimes defaulting to reporting 0.5 C changes, it isn’t something I’d do myself because a match might never happen.

Sounds a bit excessive to me.

I may have a play with virtual sensors after I’ve done the washing up.

Update: I forgot I had to get the washing in and change the bed clothes. However the Routine works fine with three decimal places.

8

hi i tried but am getting a request is malformed,

{
    "name": "Turn off a device if two temperature sensors have the same reading",
    "actions": [
        {
            "if": {
                "equals": {
                    "left": {
                        "device": {
                            "devices": [
                                "b99e319f-47ba-4758-84a8-68103b15e293"
                            ],
                            "component": "main",
                            "capability": "temperatureMeasurement",
                            "attribute": "temperature"
                        }
                    },
                    "right": {
                        "device": {
                            "devices": [
                                "bb46f49c-298d-40bd-bd17-9ac379ea1c6c"
                            ],
                            "component": "main",
                            "capability": "temperatureMeasurement",
                            "attribute": "temperature"
                        }
                    }
                },
                "then": [
                    {
                        "command": {
                            "devices": [
                                "0b14645b-e54d-4b41-b28b-ca83b244bcac"
                            ],
                            "commands": [
                                {
                                    "component": "main",
                                    "capability": "switch",
                                    "command": "off"
                                }
                            ]
                        }
                    }
                ]
            }
        }
    ]
}