Smart-valve

The purpose of this project was to replace at my house the existing NETATMO system (very good but not integrated in Home assistant and with no repeater).

I have a boiler with Opentherm Card and a dedicated dev with ESP32 https://github.com/vibr77/Opentherm_HA_MQTT

Changelog 20240102:

• Add a mecanism for manual update on the TRV (wip)

Changelog 20231031:

• Fixe BRT-100-TRV firmware issue (TRV wrong position stay at 25% open position) with a work around on current temperature

Smart-Valce is part of a suite of nodes to manage multi room heating system based on TRV and boiler

• Smart-Scheduler: multi-zonning SmartScheduler,
• Smart-Valve: Valve grouping, auto-calibration, manual override,
• Smart-Boiler: Boiler OpenTherm, multi valve management.

Smart-valve

This node enables to manage multiple valve (climate) in a same room like one. It support the following features :

• External temperature sensor,
• Multiple valves updates,
• TRV temperture Recalibration based on the external temperature sensor,
• Manual update directly on the valve to trigger override message to the scheduler and update the other valve

Key Features:

• TRV auto calibration with an external source
• Detection of manual update direcly on TRV
• Fixe BRT-100-TRV issue on valve postion that stay open
• Multi valves in the same room management
• Multi mode execution Off / auto / Manual
• Multi trigger execution: every cycle, at startup, on change.

Inputs

• payload (string):[1|on|trigger]
• sp (integer): [0-35]

Outputs

1. Update home assistant via call service

2. Update of SP to the boiler (smart-Boiler) or override message to the smart-scheduler

Settings

• Name: [string], name of the node and also the name of the group sent to the smart-boiler node

• Topic: [string], not used,

• Group Id: [integer], used by the smart-boiler node to identify this group of valves, need to be unique

• Temperature: [string], is the name of the external temperature sensor entity in home assistant ex: sensor.temp9

• Update mode: [state changed|state changed+startup|every cycle], define how frequently updates are sent to the smart-boiler node

• Update cycle: [integer], duration in minute between two cycle. default is 5

• Allow manual updates: [true|false], enable direct set point (target temperature) change on the valve or home assistant. If true when a valve set point ischanged all the other valves are updated and a override message is sent to the smart-scheduler node.

• Recalibration: [No|Yes|Yes+threshold], enable to adjust the valve (TRV) current temperature based on the external temperature sensor,

• Delta threshold: [integer] [0-9], threshold delta between external temperature sensor and the TRV current temperature to trigger recalibration,

• Debug: [true|false], send debug info to the node-red console

• Climate: each valve entry has 2 field:

  • climate: [string], home assitant climate entity of the valve ex: climate.kitchen
  • calibration: [string], home assistant calibration entity of the valve ex: number.kitchen_calibration

Execution rules

• Step 0: update current group setpoint with the sp of the valve,
• Cycle : Step 1: identify if manual updates on valve, then update all valves, Step 2: check and execute recalibration Step 3: based on the execution mode, output to the smart-boiler node
• On input: Update the requested set-point on each valves