[Question] Fan mode not surviving HVAC mode change

[leeza1971]

Your Question

Fan mode not surviving HVAC mode change

Additional Context

I have setup M5STACK ATOM Lite to control my Samsung HAVC.

I also have Home Assistant climate card to control my HVAC like below with "Power," "Cool," "Heat" and "Fan only".
Here, when I press the "Heat" button (Fan mode is "LOW" at this moment), the HVAC mode changes to heat without any problem (see the pic below).

However, the fan mode is also changed to "Auto" automatically like below.

In this state, when I press the Fan only button, the HVAC mode changes back to Fan only and the fan mode also changes back to "LOW."

Is there any way to make the fan mode survive the HVAC mode change? I want to the fan mode to stay at "LOW" (or whatever the fan mode it was in) when I change the HVAC mode.

Fan mode not surviving HVAC mode change causes some problems in automation..requires additional action to change the Fan mode in every automation whenever an action causes HVAC mode to change.

If it is not possible to keep the fan mode to stay at "LOW" (or whatever the fan mode it was in), is there a way to get rid of fan mode "Auto" by making changes to yaml file? (I do not need fan mode "Auto" at all)

I also have Samsung Smartthings add-on in home assistant to control the very same HVAC. Smartthings add-on does not have this problem. That is, when I use climate card provided by the Smartthings add-on to control the HVAC mode, Fan mode survives HVAC mode change.

Pre-Submission Checklist

• I have searched for a similar question in open/closed issues.
• I have checked the project’s documentation for relevant information.
• I have provided as much detail as possible to help answer my question.

HVAC System Type

NASA (Bus Protocol)

Samsung HVAC Device Model

No response

ESP Device Model

M5STACK ATOM Lite

Connection Pins

F1/F2

YAML Configuration

esphome:
  name: samsung-ac-atom-lite
  friendly_name: Samsung AC Controller

esp32:
  board: m5stack-atom

logger:
  baud_rate: 0
  level: VERBOSE
  logs:
    component: ERROR

web_server:

#captive_portal:

mdns:

api:

ota:
  - platform: web_server
  - platform: esphome

wifi:
  networks:
  - ssid: !secret wifi_ssid1
    password: !secret wifi_password1
  - ssid: !secret wifi_ssid6
    password: !secret wifi_password6
  - ssid: !secret wifi_ssid7
    password: !secret wifi_password7
  - ssid: !secret wifi_ssid8
    password: !secret wifi_password8

button:
  - platform: restart
    name: Restart

debug:
  update_interval: 30s

text_sensor:
  - platform: debug
    reset_reason:
      name: Reset Reason

uart:
  tx_pin: GPIO19
  rx_pin: GPIO22
  baud_rate: 9600
  parity: EVEN

external_components:
  - source: github://omerfaruk-aran/esphome_samsung_hvac_bus@main
    components: [samsung_ac]

samsung_ac:

  debug_log_messages_on_change: true
  debug_log_undefined_messages: false
  debug_log_messages: false

  capabilities:
    fan_modes: true
    vertical_swing: true
    horizontal_swing: false
    presets: 
      quiet: true

  devices:
    - address: "20.00.00"
      map_auto_to_heat_cool: false
      capabilities:
        horizontal_swing: true
        vertical_swing: true
      climate:
        name: "lounge HVAC"
        visual:
           temperature_step:
             target_temperature: 0.5
             current_temperature: 0.1

ESPHome Samsung AC Logs

No response

Additional Information

No response