I’m also running into an issue using this feature, I have it configured in the UI:
The LEDs and display are just always off though, here is my config:
{
"country": "US",
"pmStandard": "ugm3",
"ledBarMode": "co2",
"abcDays": 8,
"tvocLearningOffset": 12,
"noxLearningOffset": 12,
"mqttBrokerUrl": "",
"temperatureUnit": "f",
"configurationControl": "local",
"postDataToAirGradient": true,
"ledBarBrightness": 0,
"displayBrightness": 0,
"offlineMode": false,
"monitorDisplayCompensatedValues": false,
"model": "I-9PSL-DE"
}