topic Re: Unexpected null EXECUTE Command in Smart Home Test Suite in Smart Home Developer Forum

Unexpected null EXECUTE Command in Smart Home Test Suite

MikiNac — Thu, 26 Feb 2026 13:03:42 GMT

We are running tests using the Test Suite in the Google Smart Home Console for the project Project ID: vimar-view-dev2.
While testing a thermostat device, we are seeing an error caused by an EXECUTE command where the command field is null.

Received command:

{"inputs":[{"context":{"locale_country":"US","locale_language":"en"},"intent":"action.devices.EXECUTE","payload":{"commands":[{"devices":[{"id":"012511FAB00616_6662664"}],"execution":[{"command":null}]}]}}],"requestId":***}

GCP log

{ "textPayload": "requestId ***: Found json global errorCode hardError", "insertId": "4q6pfig1gkft14", "resource": { "type": "assistant_action", "labels": { "action_id": "SMART_HOME_EXECUTE", "project_id": "vimar-view-dev2", "version_id": "" } }, "timestamp": "20260226T11:48:32.270849516Z", "severity": "ERROR", "logName": "projects/vimar-view-dev2/logs/actions.googleapis.com%2Factions", "receiveTimestamp": "20260226T11:48:32.276443124Z" }

*** the requestid is 3*7*5*7*6*4*0*0*6*3*8*1*1*1*5*7*5*8*7 (without *)

We would like to understand whether this issue is related to the Test Suite itself or if there is a misconfiguration in our thermostat trait.
Could you help us determine why a null command is being generated and how we should proceed?

Thank you.

Re: Unexpected null EXECUTE Command in Smart Home Test Suite

arm_dpe — Fri, 27 Feb 2026 18:42:14 GMT

Thanks for reaching out.

Null command typically means Test Suit's internal logic reached a state where it knew a device needed to be updated, but it couldn't map that update to a valid Trait Command. Your SYNC response might list a Trait (like TemperatureSetting), but the specific attribute or range for the command being tested is missing or malformed. Could you please share your full Sync Response? Feel free to redact any sensitive info before sending.

Re: Unexpected null EXECUTE Command in Smart Home Test Suite

jzwackresideo — Thu, 05 Mar 2026 20:40:29 GMT

I'm also seeing this in the test suite when trying to test a thermostat.

This is the request I'm receiving:

{
    "inputs": [
        {
            "context": {
                "locale_country": "US",
                "locale_language": "en"
            },
            "intent": "action.devices.EXECUTE",
            "payload": {
                "commands": [
                    {
                        "devices": [
                            {
                                "customData": {
                                    "gatewayId": "5639499",
                                    "locationId": "1013540",
                                    "mac": "48A2E6348A77",
                                    "maxHeat": 35,
                                    "minHeat": 5,
                                    "model": "HeatingZone",
                                    "systemId": "10257225"
                                },
                                "id": "10257223"
                            }
                        ],
                        "execution": [
                            {
                                "command": null
                            }
                        ]
                    }
                ]
            }
        }
    ],
    "requestId": "15622038082962151179"
}

GCP logs only show:

actionType: "TEMPERATURESETTING_SET_THERMOSTAT_MODE"

trait: "TRAIT_TEMPERATURE_SETTING"

Re: Unexpected null EXECUTE Command in Smart Home Test Suite

MikiNac — Thu, 05 Mar 2026 20:47:02 GMT

Sure!

{ "requestId": "5*1*3*3*5*1*9*9*3*2*6*6*8*5*5*1*0*5", "payload": { "agentUserId": "89bdd251*7046*484f*a905*cd99025e70a3", "devices": [ ... { "id": "012511FAB00616_6662664", "type": "action.devices.types.THERMOSTAT", "traits": [ "action.devices.traits.TemperatureSetting" ], "name": { "defaultNames": [ "Termostato Valigetta" ], "name": "Termostato Valigetta", "nicknames": [ "Termostato Valigetta" ] }, "willReportState": true, "deviceInfo": { "manufacturer": "Vimar" }, "attributes": { "availableThermostatModes": [ "auto", "heat", "eco", "off" ], "thermostatTemperatureUnit": "C", "thermostatTemperatureRange": { "minThresholdCelsius": 4.0, "maxThresholdCelsius": 40.0 }, "queryOnlyTemperatureSetting": false } },... ] } }

Re: Unexpected null EXECUTE Command in Smart Home Test Suite

jzwackresideo — Thu, 05 Mar 2026 21:00:29 GMT

Also here is my SYNC response:

{
    "requestId": "2062055809553855972",
    "payload": {
        "agentUserId": "876698",
        "devices": [
            {
                "id": "10257223",
                "type": "action.devices.types.THERMOSTAT",
                "traits": [
                    "action.devices.traits.TemperatureSetting"
                ],
                "name": {
                    "name": "Living"
                },
                "willReportState": true,
                "attributes": {
                    "availableThermostatModes": [
                        "heat",
                        "off"
                    ],
                    "thermostatTemperatureRange": {
                        "minThresholdCelsius": 5,
                        "maxThresholdCelsius": 35
                    },
                    "thermostatTemperatureUnit": "C"
                },
                "deviceInfo": {
                    "manufacturer": "",
                    "model": "HeatingZone",
                    "hwVersion": "1.0",
                    "swVersion": "1.0"
                },
                "customData": {
                    "locationId": "1013540",
                    "gatewayId": "5639499",
                    "mac": "",
                    "systemId": "10257225",
                    "maxHeat": 35,
                    "minHeat": 5,
                    "model": "HeatingZone"
                }
            },
            {
                "id": "10257224",
                "type": "action.devices.types.THERMOSTAT",
                "traits": [
                    "action.devices.traits.TemperatureSetting"
                ],
                "name": {
                    "name": "Guest"
                },
                "willReportState": true,
                "attributes": {
                    "availableThermostatModes": [
                        "heat",
                        "off"
                    ],
                    "thermostatTemperatureRange": {
                        "minThresholdCelsius": 5,
                        "maxThresholdCelsius": 35
                    },
                    "thermostatTemperatureUnit": "C"
                },
                "deviceInfo": {
                    "manufacturer": "",
                    "model": "HeatingZone",
                    "hwVersion": "1.0",
                    "swVersion": "1.0"
                },
                "customData": {
                    "locationId": "1013540",
                    "gatewayId": "5639499",
                    "mac": "",
                    "systemId": "10257225",
                    "maxHeat": 35,
                    "minHeat": 5,
                    "model": "HeatingZone"
                }
            }
        ]
    }
}

Re: Unexpected null EXECUTE Command in Smart Home Test Suite

MikiNac — Wed, 11 Mar 2026 09:08:26 GMT

@arm_dpe Sorry to bother you, do you have any idea what it could be the problem? Tnx

Re: Unexpected null EXECUTE Command in Smart Home Test Suite

arm_dpe — Fri, 13 Mar 2026 14:27:44 GMT

Thanks for sharing. I couldn't reproduce any errors in the test suite using the sync you provided in Google Home Playground and running test suite with it. All tests passed without errors.
Did you receive any errors in the test suite tool? If yes, can you please share what test failed?