Partially working in combination with ComfoSense

[LeoSum8]

Hi there,
first of all thank you @wichers for this great component.
It is working perfectly if I connect the ESP to my Comfoair 180.

However, as a next step, I wanted to also hook up the ComfoSense again, to still allow manual control.

So I attached it to another UART via a second RS232-TTL converter and added the uart_mitm (https://github.com/ssieb/esphome_components/tree/master/components/uart_mitm) as another custom component.

As a result, I can now control the Comfoair both via Home Assistant and manually, but reading its status doesn't work anymore. Neither on the Comfosense, nor in Home Assistant (to be precise, the Comfosense still displays fan speed (away, low, mid, high) but only if it was chaned via Comfosense. When Changed via Home Assistant, the fan physically changes, but the change is not displayed in the Comfosense).

It seems as if the TX line from the Comfosense to the ESP was interrupted, but I think that is not the case, because the Comfosense only reports a comm-error, when I disconnect the communication between comfosense and ESP. As long as that is still attached, the comfosense behaves normally.

Any ideas? Is anyone runing a similar setup?

Here is my config:

esphome:
  name: comfoair

esp8266:
  board: nodemcu

# Enable logging
logger:

# Enable Home Assistant API
api:
  password: "redacted"

ota:
  - platform: esphome
    password: "redacted"

wifi:
  ssid: "redacted"
  password: "redacted!"

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "ComfoAir Fallback Hotspot"
    password: "redacted"

captive_portal:
    
external_components:
  - source:
      type: git
      url: https://github.com/wichers/esphome-comfoair
    components: [comfoair]
  - source:
      type: git
      url: https://github.com/ssieb/esphome_components
    components: [uart_mitm]

uart:
  - id: uart_comfoair
    rx_pin: GPIO13
    tx_pin: GPIO15
    baud_rate: 9600
  - id: uart_comfosense
    rx_pin: GPIO12
    tx_pin: GPIO14
    baud_rate: 9600

uart_mitm:
  uart1: uart_comfoair
  uart2: uart_comfosense

comfoair:
  name: "ComfoAir 180"
  uart_id: uart_comfoair
  type:
    name: "type"
  size:
    name: "size"
  intake_fan_speed:
    name: "intake_fan_speed"
  exhaust_fan_speed:
    name: "exhaust_fan_speed"
  intake_fan_speed_rpm:
    name: "intake_fan_speed_rpm"
  exhaust_fan_speed_rpm:
    name: "exhaust_fan_speed_rpm"
  ventilation_level:
    name: "ventilation_level"
  bypass_present:
    name: "bypass_present"
  bypass_valve:
    name: "bypass_valve"
  bypass_valve_open:
    name: "bypass_valve_open"
  preheating_state:
    name: "preheating_state"
  outside_air_temperature:
    name: "outside_air_temperature"
  supply_air_temperature:
    name: "supply_air_temperature"
  return_air_temperature:
    name: "return_air_temperature"
  exhaust_air_temperature:
    name: "exhaust_air_temperature"
  enthalpy_temperature:
    name: "enthalpy_temperature"
  ewt_temperature:
    name: "ewt_temperature"
  reheating_temperature:
    name: "reheating_temperature"
  kitchen_hood_temperature:
    name: "kitchen_hood_temperature"
  return_air_level:
    name: "return_air_level"
  supply_air_level:
    name: "supply_air_level"
  supply_fan_active:
    name: "supply_fan_active"
  filter_status:
    name: "filter_status"
  enthalpy_present:
    name: "enthalpy_present"
  ewt_present:
    name: "ewt_present"
  options_present:
    name: "options_present"
  preheating_present:
    name: "preheating_present"
  bypass_factor:
    name: "bypass_factor"
  bypass_step:
    name: "bypass_step"
  bypass_correction:
    name: "bypass_correction"
  bypass_open_hours:
    name: "bypass_open_hours"
  preheating_hours:
    name: "preheating_hours"
  level0_hours:
    name: "level0_hours"
  level1_hours:
    name: "level1_hours"
  level2_hours:
    name: "level2_hours"
  level3_hours:
    name: "level3_hours"
  preheating_valve:
    name: "preheating_valve"
  frost_protection_active:
    name: "frost_protection_active"
  frost_protection_hours:
    name: "frost_protection_hours"
  frost_protection_minutes:
    name: "frost_protection_minutes"
  frost_protection_level:
    name: "frost_protection_level"
  filter_hours:
    name: "filter_hours"
  motor_current_bypass:
    name: "motor_current_bypass"
  motor_current_preheating:
    name: "motor_current_preheating"
  summer_mode:
    name: "summer_mode"
  p10_active:
    name: "p10_active"
  p11_active:
    name: "p11_active"
  p12_active:
    name: "p12_active"
  p13_active:
    name: "p13_active"
  p14_active:
    name: "p14_active"
  p15_active:
    name: "p15_active"
  p16_active:
    name: "p16_active"
  p17_active:
    name: "p17_active"
  p18_active:
    name: "p18_active"
  p19_active:
    name: "p19_active"
  p90_active:
    name: "p90_active"
  p91_active:
    name: "p91_active"
  p92_active:
    name: "p92_active"
  p93_active:
    name: "p93_active"
  p94_active:
    name: "p94_active"
  p95_active:
    name: "p95_active"
  p96_active:
    name: "p96_active"
  p97_active:
    name: "p97_active"
  bathroom_switch_on_delay_minutes:
    name: "bathroom_switch_on_delay_minutes"
  bathroom_switch_off_delay_minutes:
    name: "bathroom_switch_off_delay_minutes"
  l1_switch_off_delay_minutes:
    name: "l1_switch_off_delay_minutes"
  boost_ventilation_minutes:
    name: "boost_ventilation_minutes"
  filter_warning_weeks:
    name: "filter_warning_weeks"
  rf_high_time_short_minutes:
    name: "rf_high_time_short_minutes"
  rf_high_time_long_minutes:
    name: "rf_high_time_long_minutes"
  extractor_hood_switch_off_delay_minutes:
    name: "extractor_hood_switch_off_delay_minutes"

i2c:
  sda: GPIO4
  scl: GPIO0

bme680_bsec:
  address: 0x77
  temperature_offset: 0

sensor:
  - platform: bme680_bsec
    temperature:
      name: "BME680 Temperature"
    pressure:
      name: "BME680 Pressure"
    humidity:
      name: "BME680 Humidity"
    iaq:
      name: "BME680 IAQ"
      id: iaq
    co2_equivalent:
      name: "BME680 CO2 Equivalent"
    breath_voc_equivalent:
      name: "BME680 Breath VOC Equivalent"

text_sensor:
  - platform: bme680_bsec
    iaq_accuracy:
      name: "BME680 IAQ Accuracy"

  - platform: template
    name: "BME680 IAQ Classification"
    icon: "mdi:checkbox-marked-circle-outline"
    lambda: |-
      if ( int(id(iaq).state) <= 50) {
        return {"Excellent"};
      }
      else if (int(id(iaq).state) >= 51 && int(id(iaq).state) <= 100) {
        return {"Good"};
      }
      else if (int(id(iaq).state) >= 101 && int(id(iaq).state) <= 150) {
        return {"Lightly polluted"};
      }
      else if (int(id(iaq).state) >= 151 && int(id(iaq).state) <= 200) {
        return {"Moderately polluted"};
      }
      else if (int(id(iaq).state) >= 201 && int(id(iaq).state) <= 250) {
        return {"Heavily polluted"};
      }
      else if (int(id(iaq).state) >= 251 && int(id(iaq).state) <= 350) {
        return {"Severely polluted"};
      }
      else if (int(id(iaq).state) >= 351) {
        return {"Extremely polluted"};
      }
      else {
        return {"error"};
      }

[LeoSum8]

I was a little too impatient. The Home Assistant readings do update sporadically. But in the previous setup without the comfosense, it was giving readings more often and updates were a lot quicker.

Is the mitm component somehow conflicting with this component in a way that it clears the buffer and data that is read by mitm is then no longer available to esphome-comfoair?
Is this a race-condition problem?

[LeoSum8]

I found out, that there are actually two rs232 connectors on my ComfoAir.
So I can connect the ComfoSense and the ESP separately in parallel without the mitm solution.

However, now the control switches from manual to automatic after some time. Has anyone else noticed that behaviour?