Smart-Boiler

this node belongs to a suite of nodes to control heating made by multiple intelligent Valve and a Central Boiler. The scheduling is done by Smart-Scheduler where multiple schedule and set-point can be defined, The valve management is done by Smart-Valve where multiple valve can be grouped in one room or group of room. And finally Smart-Boiler aims to control the boiler and to determine the right temperature and set point seeting according to the multiple valves.

Smart-Boiler Received input from Smart-Valves and expect message as : msg.payload with:

• sp for setpoint, int value
• temp for current valve temperature, int value,
• name for valve description, string value,
• id for unique valve identification, int value ex input message: msg.payload={ sp:23,temp:20,name:"Valve kitchen", id:1} Each input received will either create a new entry in the valves stack or update the current entry in the stack. Smart-Boiler will determined the active valve to be sent to the Boiler, the active valve is determine by valve set point (target temperature) > valve current temperature and by the highest gap between set point and current temperature. Exemple :
• Valve A : set point 19°C, current temperature 21 °C => inactive
• Valve B : set point 23°C, current temperature 20 °C, gap is 3 °C => active but not sent to boiler,
• Valve C : set point is 24°C and current temperature is 19°C, gap is 5°C => active and sent to the boiler.

Additionnal functionnal rules:

• If no active valve is found then highest sp of inactive valve is set as a reference to the boiler.
• If no input after max duration (defined in setting), security message is sent to the boiler to avoid endless heating,

Output:

• Can be directly to MQTT (preferred);
• regular output: msg.payload={ sp:23,temp:20,name:"Valve kitchen", id:1, lastTsUpdate: ISOTIME}; Configuration settings: MQTT: configuration node to define mqtt server connexion MQTT updates: when checked, update messages are directly sent to the defined topics Output updates: when checked, update messages are sent to the regular output, Set point topic: MQTT set Boiler set point topic Temperature topic: MQTT set Boiler current temperature topic Leading Device topic: MQTT Boiler text topic to indicate which valves is driving the heating Update cycle duration: valve stack evaluation duration cycle Max Duration since last input: maximum duration before sending security message to the boiler with default values Default temp: security message is sent with default temp Default set point: security message is sent with default set point

Run locally