RadioThermostat Binding

This binding connects RadioThermostat/3M Filtrete models CT30, CT50/3M50, CT80, etc. with built-in Wi-Fi module to openHAB.

The binding retrieves and periodically updates all basic system information from the thermostat. The main thermostat functions such as thermostat mode, fan mode, temperature set point and hold mode can be controlled. System run-time information and humidity readings are polled less frequently and can be disabled completely if not desired. Humidity information is available only when using a CT80 thermostat and I have noticed that the humidity reported is very inaccurate.

The main caveat for using this binding is to keep in mind that the web server in the thermostat is very slow. Do not over load it with excessive amounts of simultaneous commands. When changing the thermostat mode, the current temperature set point is cleared and a refresh of the thermostat data is done to get the new mode's set point. Since retrieving the thermostat's data is the slowest operation, it will take several seconds after changing the mode before the new set point is displayed. The 'Program Mode' command is untested and according to the published API is only available on a CT80 Rev B.

Supported Things

There is exactly one supported thing type, which represents the thermostat. It has the rtherm id. Multiple Things can be added if more than one thermostat is to be controlled.

Discovery

Auto-discovery is supported if the thermostat can be located on the local network using SSDP. Otherwise the thing must be manually added.

Binding Configuration

The binding has no configuration options, all configuration is done at Thing level.

Thing Configuration

The thing has a few configuration parameters:

Parameter	Description
hostName	The host name or IP address of the thermostat. Mandatory.
refresh	Overrides the refresh interval of the thermostat data. Optional, the default is 2 minutes.
logRefresh	Overrides the refresh interval of the run-time logs & humidity data. Optional, the default is 10 minutes.
isCT80	Flag to enable additional features only available on the CT80 thermostat. Optional, the default is false.
disableLogs	Disable retrieval of run-time logs from the thermostat. Optional, the default is false.
setpointMode	Controls temporary or absolute setpoint mode. In "temporary" mode the thermostat will temporarily maintain the given setpoint, returning to its program after a time. In "absolute" mode the thermostat will ignore its program maintaining the given setpoint.
clockSync	Flag to enable the binding to sync the internal clock on the thermostat to match the openHAB host's system clock. Use if the thermostat is not setup to connect to the manufacturer's cloud server. Sync occurs at binding startup and every hour thereafter.

Channels

The thermostat information that is retrieved is available as these channels:

Channel ID	Item Type	Description
temperature	Number:Temperature	The current temperature reading of the thermostat
humidity	Number:Dimensionless	The current humidity reading of the thermostat (CT80 only)
mode	Number	The current operating mode of the HVAC system
fan_mode	Number	The current operating mode of the fan
program_mode	Number	The program schedule that the thermostat is running (CT80 Rev B only)
set_point	Number:Temperature	The current temperature set point of the thermostat
status	Number	Indicates the current running status of the HVAC system
fan_status	Number	Indicates the current fan status of the HVAC system
override	Number	Indicates if the normal program set-point has been manually overridden
hold	Switch	Indicates if the current set point temperature is to be held indefinitely
remote_temp	Number:Temperature	Override the internal temperature as read by the thermostat's temperature sensor; Set to -1 to return to internal temperature mode
day	Number	The current day of the week reported by the thermostat (0 = Monday)
hour	Number	The current hour of the day reported by the thermostat (24 hr)
minute	Number	The current minute past the hour reported by the thermostat
dt_stamp	String	The current day of the week and time reported by the thermostat (E HH:mm)
today_heat_runtime	Number:Time	The total number of minutes of heating run-time today
today_cool_runtime	Number:Time	The total number of minutes of cooling run-time today
yesterday_heat_runtime	Number:Time	The total number of minutes of heating run-time yesterday
yesterday_cool_runtime	Number:Time	The total number of minutes of cooling run-time yesterday

Full Example

radiotherm.map:

UNDEF_stus=-
NULL_stus=-
-_stus=-
0_stus=Off
1_stus=Heating
2_stus=Cooling
UNDEF_fstus=-
NULL_fstus=-
-_fstus=-
0_fstus=Off
1_fstus=On
UNDEF_mode=-
NULL_mode=-
-_mode=-
0_mode=Off
1_mode=Heat
2_mode=Cool
3_mode=Auto
UNDEF_fan=-
NULL_fan=-
-_fan=-
0_fan=Auto
1_fan=Auto/Circulate
2_fan=On
UNDEF_pgm=-
NULL_pgm=-
-_pgm=-
-1_pgm=None
0_pgm=Program A
1_pgm=Program B
2_pgm=Vacation
3_pgm=Holiday
UNDEF_over=-
NULL_over=-
-_over=-
0_over=No
1_over=Yes

radiotherm.things:

radiothermostat:rtherm:mytherm1 "My 1st floor thermostat" [ hostName="192.168.10.1", refresh=2, logRefresh=10, isCT80=false, disableLogs=false, setpointMode="temporary" ]
radiothermostat:rtherm:mytherm2 "My 2nd floor thermostat" [ hostName="mythermhost2", refresh=1, logRefresh=20, isCT80=true, disableLogs=false, setpointMode="absolute" ]

radiotherm.items:

Number:Temperature  Therm_Temp  "Current Temperature [%.1f °F] " <temperature>  { channel="radiothermostat:rtherm:mytherm1:temperature" }
// Humidity only supported on CT80
Number Therm_Hum                "Current Humidity [%d %%]" <temperature>        { channel="radiothermostat:rtherm:mytherm1:humidity" }
Number Therm_Mode               "Thermostat Mode [MAP(radiotherm.map):%s_mode]" { channel="radiothermostat:rtherm:mytherm1:mode" }
// The Auto/Circulate option will only appear for CT80
Number Therm_Fmode              "Fan Mode [MAP(radiotherm.map):%s_fan]"         { channel="radiothermostat:rtherm:mytherm1:fan_mode" }
// Program Mode only supported on CT80 Rev B
Number Therm_Pmode              "Program Mode [MAP(radiotherm.map):%s_pgm]"     { channel="radiothermostat:rtherm:mytherm1:program_mode" }
Number:Temperature  Therm_Setpt "Set Point [%d]" <temperature>                  { channel="radiothermostat:rtherm:mytherm1:set_point" }
Number Therm_Status             "Status [MAP(radiotherm.map):%s_stus]"          { channel="radiothermostat:rtherm:mytherm1:status" }
Number Therm_FanStatus          "Fan Status [MAP(radiotherm.map):%s_fstus]"     { channel="radiothermostat:rtherm:mytherm1:fan_status" }
Number Therm_Override           "Override [MAP(radiotherm.map):%s_over]"        { channel="radiothermostat:rtherm:mytherm1:override" }
Switch Therm_Hold               "Hold"                                          { channel="radiothermostat:rtherm:mytherm1:hold" }

Number Therm_Day       "Thermostat Day [%s]"                                 { channel="radiothermostat:rtherm:mytherm1:day" }
Number Therm_Hour      "Thermostat Hour [%s]"                                { channel="radiothermostat:rtherm:mytherm1:hour" }
Number Therm_Minute    "Thermostat Minute [%s]"                              { channel="radiothermostat:rtherm:mytherm1:minute" }
String Therm_Dstmp     "Thermostat DateStamp [%s]" <time>                    { channel="radiothermostat:rtherm:mytherm1:dt_stamp" }

Number:Time Therm_todayheat "Today's Heating Runtime [%d %unit%]"       { channel="radiothermostat:rtherm:mytherm1:today_heat_runtime" }
Number:Time Therm_todaycool "Today's Cooling Runtime [%d %unit%]"       { channel="radiothermostat:rtherm:mytherm1:today_cool_runtime" }
Number:Time Therm_yesterdayheat "Yesterday's Heating Runtime [%d %unit%]"   { channel="radiothermostat:rtherm:mytherm1:yesterday_heat_runtime" }
Number:Time Therm_yesterdaycool "Yesterday's Cooling Runtime [%d %unit%]"   { channel="radiothermostat:rtherm:mytherm1:yesterday_cool_runtime" }

// Override the thermostat's temperature reading with a value from an external sensor, set to -1 to revert to internal temperature mode
Number:Temperature Therm_Rtemp  "Remote Temperature [%d]" <temperature>     { channel="radiothermostat:rtherm:mytherm1:remote_temp" }

// A virtual switch used to trigger a rule to send a json command to the thermostat
Switch Therm_mysetting   "Send my preferred setting"

radiotherm.sitemap:

sitemap radiotherm label="My Thermostat" {
    Frame label="My 1st floor thermostat" {
        Text item=Therm_Temp icon="temperature" valuecolor=[>76="orange",>67.5="green",<=67.5="blue"]
        // Humidity only supported on CT80
        Text item=Therm_Hum icon="humidity"
        Setpoint item=Therm_Setpt label="Target temperature [%d °F]" visibility=[Therm_Mode==1,Therm_Mode==2] icon="temperature" minValue=60 maxValue=85 step=1
        Selection item=Therm_Mode icon="climate"
        Selection item=Therm_Fmode icon="fan"
        // Program Mode only supported on CT80 Rev B
        Selection item=Therm_Pmode icon="smoke"
        Text item=Therm_Status icon="climate"
        Text item=Therm_FanStatus icon="flow"
        Text item=Therm_Override icon="smoke"
        Switch item=Therm_Hold icon="smoke"

        // Example of overriding the thermostat's temperature reading
        Switch item=Therm_Rtemp label="Remote Temp" icon="temperature" mappings=[60="60", 75="75", 80="80", -1="Reset"]

        // Virtual switch/button to trigger a rule to send a custom command
        // The ON value displays in the button
        Switch item=Therm_mysetting mappings=[ON="Heat, 68, hold"]

        Text item=Therm_Day
        Text item=Therm_Hour
        Text item=Therm_Minute
        Text item=Therm_Dstmp

        Text item=Therm_todayheat
        Text item=Therm_todaycool
        Text item=Therm_yesterdayheat
        Text item=Therm_yesterdaycool
    }
}

radiotherm.rules:

rule "Send my thermostat command"
when
  Item Therm_mysetting received command
then
  val actions = getActions("radiothermostat","radiothermostat:rtherm:mytherm1")
  if(null === actions) {
      logInfo("actions", "Actions not found, check thing ID")
      return
  }
  // JSON to send directly to the thermostat's '/tstat' endpoint
  // See RadioThermostat_CT50_Honeywell_Wifi_API_V1.3.pdf for more detail
  actions.sendRawCommand('{"hold":1, "t_heat":' + "68" + ', "tmode":1}')
end

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