Set ebusd values on MQTT with payload in JSON format

[estegewr]

Description

I use ebusd's MQTT output in JSON format, so I get the following result when querying the heating time slots:

To set these values I have to use the format which is also required and well-known from telnet server connection:
mosquitto_pub -h localhost -t "ebusd/hwc/Timer.Monday/set" -m "05:20;05:50;-:-;-:-;15:20;15:50;selected"

Is it planned to also support JSON format as payload for the set command?

[john30]

it could be added in principle, but I don't see a huge benefit right now, as the JSON for setting the value would have to include all the fields as well. so it is just a matter of formatting

[estegewr]

in a program development area, I can work around with an output template. For testing I'd like to use MQTT Explorer or comparable program. There it would be comfortable if I only have to change one value in the JSON payload and copy&paste the data back.

But as you said, it's not a must-have feature for the ebusd community.

[mf76130]

Hi,
I want to hijack this discussion :-)
Since yesterday i have my new ebusd adapter and now i can write.
What i want to achieve is set the hotwater desired temp from Home Assistant.
from ebus this command does what it should:
ebusctl write -c 700 HwcTempDesired 48

so i tried to send from HomeAssistant to the mqtt:
Topic: ebusd/700/HwcTempDesired
payload: { "tempv": { "value": 45 } }

that of course just publishes that value in the MQTT, but doesn't set it on the vailant.
What do i need to do to write it the vailant system?

br
michael

[Koky05]

@mf76130 here is my mqtt code for that purpouse:

climate:
  - name: Hot water circuite
    entity_category: config
    max_temp: 70
    min_temp: 35
    precision: 0.1
    temp_step: 0.5
    temperature_unit: "C"
    action_topic: "ebusd/bai/Status01"
    action_template: >-
      {% set values = {
        'on':'heating',
        'off':'idle',
        'hwc':'fan' } %}
      {% set state = value_json['5']['value'] %}
      {{ values[state] if state in values.keys() else 'off' }}
    modes:
      - auto
      - heat
      - 'off'
      - cool
    mode_state_template: >-
      {% set values = {
        2:'auto',
        3:'auto',
        1:'heat',
        6:'heat',
        4:'heat',
        0:'off',
        7:'cool' } %}
      {% set state = value_json['0']['value'] %}
      {{ values[state] if state in values.keys() else 'off' }}
    mode_state_topic:  "ebusd/f47/HwcOPMode"
    mode_command_template: >-
      {% set values = {
        'auto':2,
        'heat':1,
        'off':0,
        'cool':7} %}
      {{ values[value] if value in values.keys() else 2 }}
    mode_command_topic: "ebusd/f47/HwcOPMode/set"
    temperature_state_topic: "ebusd/f47/HwcTempDesired"
    temperature_state_template: "{{ (value_json.temp1.value | float(0)) }}"
    temperature_command_topic : "ebusd/f47/HwcTempDesired/set"
    current_temperature_topic: "ebusd/bai/StorageExitTemp"
    current_temperature_template: "{{ (value_json.temp.value | float(0)) }}"
    qos: 2

[john30]

@mf76130 the HA MQTT integration does all that automatically if you enable write messages as documented

[mf76130]

thanks, i had that already setup from the beginning

[DrDuk]

I'm trying to do something similar. I've got HA MQTT integration and I can see the MQTT messages using MQTT Explorer. For example:
ebusd/bai/FlowTempDesired/ shows as:
{
"temp": {
"value": 67
}
}

I'm using the addon in supervisor so this should simplify things. I've set:
accesslevel: "*"
readonly: false
in the configuration of the addon so I assume that this enables writes.
Is this correct or do I need to set the write ability somewhere else?
When I send to topic:
ebusd/bai/FlowTempDesired/set

{
"temp": {
"value": 67
}
}

as JSON then I receive in the logs the following error:

2022-12-14 18:30:51.421 [mqtt error] write message bai FlowTempDesired not found

How do I work out the correct write command. I have a Vaillant ecoTEC plus 637 without any controller or weather compensation device and just want to be able to remotely set the flow temp.
Thanks

[mf76130]

try sending just 67
no brackets nothing just the number
instead of {
"temp": {
"value": 67
}
}

[DrDuk]

Sorry, that doesn't work. When I send to the topic
ebusd/bai/FlowTempDesired/get
a message with no content I receive back:
2022-12-14 20:10:05.745 [update notice] sent poll-read bai FlowTempDesired QQ=31: 69.00
2022-12-14 20:10:05.745 [mqtt notice] read bai FlowTempDesired:

but when I send:
ebusd/bai/FlowTempDesired/set
67

I get back from the logs:
2022-12-14 20:11:11.894 [mqtt error] write message bai FlowTempDesired not found

[DrDuk]

Looking at the MQTT ebusd bai device and the MQTT configuration information, all of the entities are sensors and none come up as inputs, e.g.

ebusd bai FlowTempDesired temp (sensor.ebusd_bai_flowtempdesired_temp)
MQTT discovery data:
Topic: homeassistant/sensor/ebusd_bai_FlowTempDesired_temp/config
Payload
unique_id: ebusd_bai_FlowTempDesired_temp
name: ebusd bai FlowTempDesired temp
device:
identifiers: ebusd_bai
manufacturer: ebusd.eu
name: ebusd bai
via_device: ebusd
sw_version: '22.4'
suggested_area: Heating
value_template: '{{value_json["temp"].value}}'
state_topic: ebusd/bai/FlowTempDesired
unit_of_measurement: °C
state_class: measurement
device_class: temperature
platform: mqtt

I wonder if the supervisor addon doesn't allow write functionality or if a further configuration setting needs to be made?
I have set this to off: Read Only (default: off)
but perhaps something else needs to be done?
I haven't loaded a custom csv config file for my boiler. Do I need to do that?

[john30]

@DrDuk check with ebusctl if that message exists as writable. if not, then you can't write to it of course. if yes, maybe the write messages need to be enabled in the HA integration see docs here

ebusd/contrib/etc/ebusd/mqtt-hassio.cfg

Line 119 in 5d3c6f0

# HA integration: for including writable messages, use this line or overwrite with '--mqttvar=filter-direction=r|u|^w'.

and https://www.home-assistant.io/

[msth]

Have a similar problem. Installed ebusd as a local service with the following options.

usr/bin/ebusd -c /etc/ebusd/ebusd-configuration/latest/de --configlang=DE --mqtthost=192.168.1.x --mqttport=1883 --mqtttopic=ebusd --mqttuser=ebusd --mqttpass= --mqttjson --mqttint=/etc/ebusd/mqtt-hassio.cfg --mqttvar=filter-direction=r|u|^w --scanconfig --device=192.168.1.25:5000 -l /var/log/ebusd.log

Ebus finds my Vailant heater.

ebusctl info
version: ebusd 23.1.23.1
update check: OK
device: 192.168.1.25:5000
signal: acquired
symbol rate: 31
max symbol rate: 137
min arbitration micros: 3
max arbitration micros: 39
min symbol latency: 8
max symbol latency: 19
reconnects: 0
masters: 3
messages: 621
conditional: 213
poll: 123
update: 60
address 03: master #11
address 08: slave #11, scanned "MF=Vaillant;ID=EHP00;SW=0412;HW=7201", loaded "vaillant/08.ehp.csv"
address 10: master #2
address 15: slave #2, scanned "MF=Vaillant;ID=UIH00;SW=0362;HW=6901", loaded "vaillant/15.uih.csv"
address 23: slave, scanned "MF=Vaillant;ID=EHP00;SW=0412;HW=7201", loaded "vaillant/23.ehp.cc.csv"
address 25: slave, scanned "MF=Vaillant;ID=EHP00;SW=0412;HW=7201", loaded "vaillant/25.ehp.hwc.csv"
address 31: master #8, ebusd
address 36: slave #8, ebusd
address 50: slave, scanned "MF=Vaillant;ID=EHP00;SW=0412;HW=7201", loaded "vaillant/50.ehp.mc.csv"

Values can be changed via ebusctl

ebusctl write -c hwc OperatingMode  on
done

These are also returned to HomeAssistant. However, I cannot change any values via MQTT/HomeAssistant. The data is not even transferred to MQTT.