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  1. esphome:
  2.   name: opentherm
  3.   platform: ESP32
  4.   board: lolin_s2_mini
  5.   on_boot:
  6.     priority: -100
  7.     then:
  8.       - number.set:
  9.           id: t_dhw_set
  10.           value: 55
  11.       - number.set:
  12.           id: max_t_set
  13.           value: 80
  14.  
  15. logger:
  16. # "NONE", "ERROR", "WARN", "INFO", "CONFIG", "DEBUG", "VERBOSE", "VERY_VERBOSE"
  17.   level: INFO
  18.   logs:
  19.     api: WARN
  20.     binary_sensor: WARN
  21.     climate: INFO
  22.     homeassistant.sensor: WARN
  23.     homeassistant: WARN
  24.     logger: INFO
  25.     mdns: WARN
  26.     number: INFO
  27.     opentherm: ERROR
  28.     component: ERROR
  29.     pid.autotune: INFO
  30.     pid: INFO
  31.     template: INFO
  32.     text_sensor: INFO
  33.  
  34.  
  35. api:
  37. ota:
  38.   platform: esphome
  39. wifi:
  40.   ap:
  41.     ssid: "Thermostat"
  42. captive_portal:
  44. web_server:
  45.   version: 3
  46.   log: false
  47.  
  48. opentherm:
  49.   in_pin: 33
  50.   out_pin: 35
  51.   sync_mode: true
  52.   ch_enable: true
  53.   dhw_enable: true
  54.   cooling_enable: false
  55.   otc_active: false
  56.   ch2_active: false
  57.  
  58. output:
  59.   - platform: opentherm
  60.     t_set:
  61.       id: boiler_setpoint    # setpoint range for boiler water temp in C
  62.       min_value: 45
  63.       max_value: 80
  64.       zero_means_zero: true
  65.  
  66. number:
  67.   - platform: template
  68.     name: "Boiler Setpoint Setting"
  69.     id: tset_setting         # Number input for boiler_setpoint for testing or other thermostat control in HA, boiler_setpoint is controlled by esphome PID thermostat normally
  70.     min_value: 45
  71.     max_value: 80
  72.     mode: box
  73.     step: 1
  74.     lambda: "return id(boiler_setpoint).state;"
  75.     set_action:
  76.       - lambda: "id(boiler_setpoint).write_state(x);"
  77.  
  78.   - platform: opentherm
  79.     t_dhw_set:
  80.       id: t_dhw_set         # Domestic Hot Water Setpoint
  81.       name: "Boiler DHW Setpoint"
  82.     max_t_set:
  83.       id: max_t_set
  84.       name: "Boiler Max Setpoint"
  85. #    otc_hc_ratio:
  86. #      id: ot_hc_ratio       # Heat Curve when using outside temperature sensor and weather compensation
  87. #      name: "OTC heat curve ratio:
  88.  
  89.   - platform: template
  90.     name: "CH max t_set"
  91.     id: ch_max_t_set         # Maximum boiler setpoint, this is limited by a setting in the boiler but can be set lower
  92.     mode: box
  93.     entity_category: config
  94.     min_value: 0
  95.     max_value: 100
  96.     step: 0.1
  97.     lambda: "return id(boiler_setpoint).get_max_value();"
  98.     set_action:
  99.       - lambda: "id(boiler_setpoint).set_max_value(x);"
  100.  
  101.   - platform: template
  102.     name: "CH min t_set"     # Minimum boiler setpoint flow temperature, set this to a setting that the boiler can modulate to without cycling off and on execessively 45C works for average radiator setups. Underfloor heating could be lower.
  103.     id: ch_min_t_set
  104.     mode: box
  105.     entity_category: config
  106.     min_value: 0
  107.     max_value: 100
  108.     step: 0.1
  109.     lambda: "return id(boiler_setpoint).get_min_value();"
  110.     set_action:
  111.       - lambda: "id(boiler_setpoint).set_min_value(x);"
  112.  
  113.  
  114.   - platform: template
  115.     name: "PID Proportional"
  116.     id: thermostat_kp
  117.     mode: box
  118.     entity_category: config
  119.     min_value: 0
  120.     max_value: 100
  121.     step: 0.00001
  122.     lambda: "return id(central_heating_ot).get_kp();"
  123.     set_action:
  124.       - lambda: "id(central_heating_ot).set_kp(x);"
  125.  
  126.   - platform: template
  127.     name: "PID Integral"
  128.     id: thermostat_ki
  129.     mode: box
  130.     entity_category: config
  131.     min_value: 0
  132.     max_value: 100
  133.     step: 0.00001
  134.     lambda: "return id(central_heating_ot).get_ki();"
  135.     set_action:
  136.       - lambda: "id(central_heating_ot).set_ki(x);"
  137.  
  138.   - platform: template
  139.     name: "PID Derivative"
  140.     id: thermostat_kd
  141.     mode: box
  142.     entity_category: config
  143.     min_value: 0
  144.     max_value: 9999
  145.     step: 0.001
  146.     lambda: "return id(central_heating_ot).get_kd();"
  147.     set_action:
  148.       - lambda: "id(central_heating_ot).set_kd(x);"
  149.  
  150.  
  151. sensor:
  152. # Not all opentherm sensors provided by the opentherm component are implemented by each boiler manufacturer
  153. # Non-working sensors seem to report zero rather than not available in both sensors and binary_sensors
  154.   - platform: opentherm
  155.     rel_mod_level:
  156.       name: "Boiler Relative modulation level"
  157.       filters:
  158.         - throttle_average: 15s
  159.     ch_pressure:
  160.       name: "Boiler Water pressure in CH circuit"
  161.       filters:
  162.         - throttle_average: 60s
  163.     t_boiler:
  164.       name: "Boiler water temperature"
  165.       filters:
  166.         - throttle_average: 15s
  167.     t_ret:
  168.       name: "Boiler water return temperature"
  169.     t_dhw:
  170.       name: "Boiler DHW temperature"
  171.       filters:
  172.         - throttle_average: 15s
  173.     t_dhw_set:
  174.       name: "Boiler Domestic hot water temperature setpoint"
  175.     dhw_flow_rate:
  176.       name: "DHW Flow Rate"
  177.  
  178.   # The following gets temperature from two other esphome devices and applies kalman filer
  179.   # These sensors preferably should have two decimals be smoothed with filters to get rid of noise and update frequently
  180.   # This helps the PID algorithm to adjust itself appropriately
  181.   - platform: homeassistant
  182.     name: lounge_dallas
  183.     id: lounge_dallas
  184.     entity_id: sensor.lounge_dallas
  185.     filters:
  186.       heartbeat: 15s
  187.   - platform: homeassistant
  188.     name: kitchen_dallas
  189.     id: kitchen_dallas
  190.     entity_id: sensor.kitchen_dallas
  191.     filters:
  192.       heartbeat: 15s
  193.   - platform: combination
  194.     type: kalman
  195.     id: "t_room"    
  196.     name: "Ground Floor Temperature"
  197.     unit_of_measurement: "°C"
  198.     accuracy_decimals: 2
  199.     process_std_dev: 0.001
  200.     sources:
  201.       - source: lounge_dallas
  202.         error: 0.1
  203.       - source: kitchen_dallas
  204.         error: 0.1
  205.  
  206.   - platform: homeassistant
  207.     name: Heating Setpoint
  208.     id: t_room_set
  209.     entity_id: climate.central_heating_ot
  210.     attribute: temperature
  211.     internal: false
  212.     state_class: measurement
  213.     unit_of_measurement: °C
  214.  
  215.   - platform: pid
  216.     name: "PID Climate Result"
  217.     type: RESULT
  218.     accuracy_decimals: 6
  219.   - platform: pid
  220.     name: "PID Climate Error"
  221.     type: ERROR
  222.     accuracy_decimals: 6
  223.   - platform: pid
  224.     name: "PID Climate Proportional"
  225.     type: PROPORTIONAL
  226.     accuracy_decimals: 6
  227.   - platform: pid
  228.     name: "PID Climate Integral"
  229.     type: INTEGRAL
  230.     accuracy_decimals: 6
  231.   - platform: pid
  232.     name: "PID Climate Derivative"
  233.     type: DERIVATIVE
  234.     accuracy_decimals: 6
  235.   - platform: pid
  236.     name: "PID Climate Heat"
  237.     id: pid_climate_heat
  238.     type: HEAT
  239.     accuracy_decimals: 6
  240.   - platform: pid
  241.     name: "PID Climate Kp"
  242.     type: KP
  243.     accuracy_decimals: 6
  244.   - platform: pid
  245.     name: "PID Climate Ki"
  246.     type: KI
  247.     accuracy_decimals: 6
  248.   - platform: pid
  249.     name: "PID Climate Kd"
  250.     type: KD
  251.     accuracy_decimals: 6
  252.   - platform: uptime
  253.     name: Opentherm Uptime
  254.     id: ot_uptime
  255.     update_interval: 60s
  256.     entity_category: "diagnostic"
  257.   - platform: template
  258.     name: "Boiler Setpoint"
  259.     id: pid_setpoint
  260.     unit_of_measurement: "°C"
  261.     icon: "mdi:fire"
  262.     device_class: "temperature"
  263.     state_class: "measurement"
  264.     accuracy_decimals: 2
  265.     update_interval: 10s
  266.     lambda: return id(boiler_setpoint).state;
  267.  
  268. binary_sensor:
  269. # Not all opentherm sensors provided by the opentherm component are implemented by each boiler manufacturer
  270. # Non-working sensors seem to report zero rather than not available in both sensors and binary_sensors
  271.   - platform: opentherm
  272.     fault_indication:
  273.       name: "Boiler Fault indication"
  274.     ch_active:
  275.       name: "Boiler Central Heating active"
  276.     dhw_active:
  277.       name: "Boiler Domestic Hot Water active"
  278.     flame_on:
  279.       name: "Boiler Flame on"
  280.     diagnostic_indication:
  281.       name: "Boiler Diagnostic event"
  282. #    dhw_present:
  283. #      name: "Boiler DHW present"
  284. #    control_type_on_off:
  285. #      name: "Boiler Control type is on/off"
  286. #    dhw_storage_tank:
  287. #      name: "Boiler DHW storage tank"
  288. #    master_pump_control_allowed:
  289. #      name: "Boiler Master pump control allowed"
  290. #    dhw_setpoint_transfer_enabled:
  291. #      name: "Boiler DHW setpoint transfer enabled"
  292. #    max_ch_setpoint_transfer_enabled:
  293. #      name: "Boiler CH maximum setpoint transfer enabled"
  294. #    dhw_setpoint_rw:
  295. #      name: "Boiler DHW setpoint read/write"
  296. #    max_ch_setpoint_rw:
  297. #     name: "Boiler CH maximum setpoint read/write"
  298.     service_request:
  299.       name: "Service Request"
  300.     lockout_reset:
  301.       name: "Lockout Reset"
  302.     low_water_pressure:
  303.       name: "Low Water Pressure"
  304.     flame_fault:
  305.       name: "Gas/Flame Fault"
  306.     air_pressure_fault:
  307.       name: "Air Pressure Fault"
  308.     water_over_temp:
  309.       name: "Water Over Temp"
  310.  
  311.  
  312. switch:
  313.   - platform: opentherm
  314.     ch_enable:
  315.       name: "Boiler Central Heating enabled"
  316.       restore_mode: RESTORE_DEFAULT_ON
  317.     dhw_enable:
  318.       name: "Boiler Domestic Hot Water enabled"
  319.       restore_mode: RESTORE_DEFAULT_ON
  320.     cooling_enable:
  321.       name: "Boiler Cooling enabled"
  322.       restore_mode: RESTORE_DEFAULT_OFF
  323.     otc_active:
  324.       name: "Boiler Outside temperature compensation active"
  325.       restore_mode: RESTORE_DEFAULT_OFF
  326.     ch2_active:
  327.       name: "Boiler Central Heating 2 active"
  328.       restore_mode: RESTORE_DEFAULT_OFF
  329.   - platform: restart
  330.     name: "Opentherm Restart"
  331.  
  332. climate:
  333.   - platform: pid
  334.     id: central_heating_ot
  335.     name: "Central heating OT"
  336.     heat_output: boiler_setpoint
  337.     default_target_temperature: 20.4
  338.     sensor: t_room
  339.     control_parameters:
  340. # Suggested default: kp: 0.7 ki: 0.003 kd: 0.0
  341. # previous 23/1/24  kp: 0.6790622 ki: 0.0003784035 kd: 304.652
  342. # autotune 23/1 kp: 0.949 ki: 0.00021 kd: 1052
  343. # autotune 25/3 kp: 0.90407 ki: 0.00006 kd: 3196.35376
  344.       kp: 2
  345.       ki: 0.00003
  346.       kd: 0.9
  347. #      min_integral: 0
  348. #      max_integral: 0.25
  349. #      starting_integral_term: 0
  350.       output_averaging_samples: 2
  351.       derivative_averaging_samples: 8
  352.     deadband_parameters:
  353.       threshold_high: 0.5
  354.       threshold_low: -0.3
  355.       kp_multiplier: 0.05
  356.       ki_multiplier: 0.05
  357.       kd_multiplier: 0.0
  358.       deadband_output_averaging_samples: 20
  359.     visual:
  360.       min_temperature: 10
  361.       max_temperature: 23
  362.       temperature_step: 0.1
  363.  
  364. button:
  365.   - platform: template
  366.     name: "PID Climate Autotune"
  367.     on_press:
  368.       - climate.pid.set_control_parameters:
  369.           id: central_heating_ot
  370.           kp: 0.0
  371.           ki: 0.0
  372.           kd: 0.0
  373.       - climate.pid.autotune: central_heating_ot
  374.   - platform: template
  375.     name: "Reset Integral term"
  376.     on_press:
  377.       - climate.pid.reset_integral_term: central_heating_ot
  378.  
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