pimatic-mythermostat

Thermostat plugin for the Pimatic

Synopsis

This plugin is a simple thermostat for Pimatic. Here are some examples of the functionality

• scheduling and manual modes
• Bang Bang and PID controllers
• Early On (coming)
• a simple but explicit UI

Requirement

To make it work, you'll need :

• some heaters that can be witched on or off using a Pimatic rules or action
• a thermometer controlling the temperature of the room

configuration

To include the plugin just add this code in the plugins section

{
  "plugin": "mythermostat"
},

The configuration is split in 3 different zones

1. the observable and controllers
2. the different programs
3. the schedule
4. a trick !

Observable and controllers

The thermostat is continuously observing the room temperature given by a variable variableTemp it will also switch On or Off the heaters by executing an Action

  "variableTemp": "temperature.variableName",
  "actionHeatingOn": "press heat-on-button",
  "actionHeatingOff": "press heat-off-button",

The different programs

The thermostat's objective temperature is based on programs.

  "programs": [
    {
      "id": 0,
      "temperature": 18.5
    },
    {
      "id": 1,
      "temperature": 19.5
    },
    {
      "id": 2,
      "temperature": 20.5
    }
  ],

The schedule

The schedule is expressed for each day of the week "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" , "Sun". For each day, you can set a program (ie a temperature) that starts at the given time and end at the next program

"timetable": [
{
  "day": "Mon",
  "schedule": [
    {
      "start": "0000",
      "programID": 0
    },
    {
      "start": "0700",
      "programID": 1
    },
    {
      "start": "0800",
      "programID": 0
    },
    {
      "start": "1800",
      "programID": 2
    },
    {
      "start": "2200",
      "programID": 0
    }
  ]
}, ...

The trick!

To refresh the UI when program changes, you must emit a variable. Pimatic will try to save it in the database and will throw an exception as it is an array.

Just add this to the deviceAttributeLogging

{
  "deviceId": "*",
  "attributeName": "currentProgram",
  "expire": "0d",
  "type": "*"
}

Full config

in the database section

"database": {
  "deviceAttributeLogging": [
    ...
    {
      "deviceId": "*",
      "attributeName": "currentProgram",
      "expire": "0d",
      "type": "*"
    }
  ],
}

Add as many thermostat devices as needed in the devicesection.

{
  "id": "thermostat",
  "class": "MyHeatingThermostat",
  "name": "Thermostat Salon",
  "comfyTemp": 21,
  "ecoTemp": 16,
  "controller": "PID",
  "variableTemp": "tempsalon.temperature",
  "actionHeatingOn": "press heat-on-button",
  "actionHeatingOff": "press heat-off-button",
  "programs": [
    {
      "id": 0,
      "temperature": 18.5
    },
    {
      "id": 1,
      "temperature": 19.5
    },
    {
      "id": 2,
      "temperature": 20.5
    }
  ],
  "timetable": [
    {
      "day": "Mon",
      "schedule": [
        {
          "start": "0000",
          "programID": 0
        },
        {
          "start": "0700",
          "programID": 1
        },
        {
          "start": "0800",
          "programID": 0
        },
        {
          "start": "1800",
          "programID": 2
        },
        {
          "start": "2200",
          "programID": 0
        }
      ]
    },
    {
      "day": "Tue",
      "schedule": [
        {
          "start": "0000",
          "programID": 0
        },
        {
          "start": "0700",
          "programID": 1
        },
        {
          "start": "0800",
          "programID": 0
        },
        {
          "start": "1800",
          "programID": 2
        },
        {
          "start": "2200",
          "programID": 0
        }
      ]
    },
    {
      "day": "Wed",
      "schedule": [
        {
          "start": "0000",
          "programID": 0
        },
        {
          "start": "0700",
          "programID": 1
        },
        {
          "start": "0800",
          "programID": 0
        },
        {
          "start": "1630",
          "programID": 2
        },
        {
          "start": "2200",
          "programID": 0
        }
      ]
    },
    {
      "day": "Thu",
      "schedule": [
        {
          "start": "0000",
          "programID": 0
        },
        {
          "start": "0700",
          "programID": 1
        },
        {
          "start": "0800",
          "programID": 0
        },
        {
          "start": "1800",
          "programID": 2
        },
        {
          "start": "2200",
          "programID": 0
        }
      ]
    },
    {
      "day": "Fri",
      "schedule": [
        {
          "start": "0000",
          "programID": 0
        },
        {
          "start": "0700",
          "programID": 1
        },
        {
          "start": "0800",
          "programID": 0
        },
        {
          "start": "1630",
          "programID": 2
        },
        {
          "start": "2200",
          "programID": 0
        }
      ]
    },
    {
      "day": "Sat",
      "schedule": [
        {
          "start": "0000",
          "programID": 0
        },
        {
          "start": "0700",
          "programID": 1
        },
        {
          "start": "0900",
          "programID": 2
        },
        {
          "start": "2200",
          "programID": 0
        }
      ]
    },
    {
      "day": "Sun",
      "schedule": [
        {
          "start": "0000",
          "programID": 0
        },
        {
          "start": "0700",
          "programID": 1
        },
        {
          "start": "0900",
          "programID": 2
        },
        {
          "start": "2200",
          "programID": 0
        }
      ]
    }
  ]
},

Next

This plugin is still under development.

• PID is not correctly implemented, as of today, it is a simple proportional controller
• PreHeat : start heating according to the next scheduled temperature
• Make it smart : add a presence sensor and some maths (HMM?)
• Off mode is not working
• UI

License

Code released under the MIT license.