Honeywell home certificate error . and resolution

kahn-hubitat · May 19, 2026, 1:42pm

No i figured it out..

Thanks though.

They moved the api from api.honeywell.com to api.honeywellhome.com,
and redo login/connection and device selection.

You need to change the line in the code or get a new copy from my github.

I have two versions onewith hourly, monthly, yearly usage (percentage of refreshes showing device on) or one without.

here are my github locations:

app without statistics

github.com

lgkahn/hubitat/blob/master/honeywell.groovy

/*
Hubitat Driver For Honeywell Thermistat

Copyright 2020 - Taylor Brown

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Major Releases:
11-25-2020 :  Initial 
11-27-2020 :  Alpha Release (0.1)
12-15-2020 :  Beta 1 Release (0.2.0)
4/23 lgk fix supportedThermostatModes and supportedThermostatFanModes so dashboards work again for setting these.
 3/24 lgk add code to handle and retry after communication failures
 10/24 lgk add tons of new attrbiutes
ie 
maxCoolSetPoint : 90

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app with statistics

github.com

lgkahn/hubitat/blob/master/honeywellhome

/*
Hubitat Driver For Honeywell Thermistat

Copyright 2020 - Taylor Brown

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Major Releases:
11-25-2020 :  Initial 
11-27-2020 :  Alpha Release (0.1)
12-15-2020 :  Beta 1 Release (0.2.0)
4/23 lgk fix supportedThermostatModes and supportedThermostatFanModes so dashboards work again for setting these.
 3/24 lgk add code to handle and retry after communication failures
 10/24 lgk add tons of new attrbiutes
ie 
maxCoolSetPoint : 90

This file has been truncated. show original

device driver

github.com

lgkahn/hubitat/blob/master/honeywellhomedriver

/*
Hubitat Driver For Honeywell Thermistat

Copyright 2020 - Taylor Brown

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Major Releases:
11-25-2020 :  Initial 
11-27-2020 :  Alpha Release (0.1)
12-15-2020 :  Beta 1 Release (0.2.0)
lgk 12-24-2020 add lastUpdated and humidity
lgk 10/24 new attributes 

*/
import groovy.json.JsonSlurper

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