NASA register codes

Every Samsung HVAC variable on the F1/F2 NASA bus is addressed by a 16-bit message number. This page catalogues the ones we know about, grouped by subsystem, with HeatSync’s coverage marked.

Coverage column legend:

• ✅ named — has a dedicated MessageTarget callback in the upstream NASA parser and surfaces via /api/live
• ✅ custom — captured via our set_custom_sensor switch in ha_bridge.cpp
• — — not currently decoded by HeatSync (still visible in /sniffer when broadcast)

Generated from betaphi/NASAKit/Sources/NASAKit/Resources/NASATypes.json by scripts/generate-nasa-codes.py. 425 registers in source; any not listed here are very low-level (UART debug, factory test, etc.).

Address conventions: kk.cc.aa where kk is the address class — indoor 0x20, outdoor 0x10, wired remote 0x50. Messages prefixed in_ are about the indoor unit; out_ about the outdoor unit.

Type legend: enum = single-byte enumerated value, uvar/svar = 16-bit unsigned/signed integer, lvar = 32-bit, /N = divide raw value by N for engineering units (e.g. svar /10 for °C).

---

Indoor — power & mode

msg	name	type	covered
0x4000	ENUM_in_operation_power	enum	✅ named
0x4001	ENUM_in_operation_mode	enum	✅ named
0x4002	ENUM_in_operation_mode_real	enum	✅ named
0x4003	ENUM_IN_OPERATION_VENT_POWER	enum	✅ named
0x4004	ENUM_IN_OPERATION_VENT_MODE	enum	✅ named
0x4038	ENUM_IN_STATE_HUMIDITY_PERCENT	enum	✅ named
0x4119	ENUM_IN_OPERATION_POWER_ZONE1	enum	✅ named
0x411E	ENUM_IN_OPERATION_POWER_ZONE2	enum	✅ named

Indoor — fan & louver

msg	name	type	covered
0x4007	ENUM_in_fan_mode_real	enum	✅ named
0x4008	ENUM_IN_FAN_VENT_MODE	enum	✅ named
0x4011	ENUM_IN_LOUVER_HL_SWING	enum	✅ named
0x4012	ENUM_in_louver_hl_part_swing	enum	✅ named
0x407E	ENUM_IN_LOUVER_LR_SWING	enum	✅ named

Indoor — temperatures (room, setpoint, evaporator)

msg	name	type	covered
0x4201	VAR_in_temp_target_f	svar /10	✅ named
0x4203	VAR_in_temp_room_f	svar /10	—

Indoor — heating water loop

msg	name	type	covered
0x4067	ENUM_IN_3WAY_VALVE	enum	—
0x4068	ENUM_IN_SOLAR_PUMP	enum	—
0x4089	ENUM_IN_STATE_WATER_PUMP	enum	—
0x408A	ENUM_IN_2WAY_VALVE	enum	—
0x40C4	ENUM_IN_WATERPUMP_PWM_VALUE	enum	—
0x4102	ENUM_IN_STATE_FLOW_CHECK	enum	—
0x4103	ENUM_IN_WATER_VALVE_1_ON_OFF	enum	—
0x4104	ENUM_IN_WATER_VALVE_2_ON_OFF	enum	—
0x4113	ENUM_IN_3WAY_VALVE_2	enum	—
0x4236	VAR_IN_TEMP_WATER_IN_F	svar /10	—
0x4238	VAR_IN_TEMP_WATER_OUT_F	svar /10	—
0x4239	VAR_IN_TEMP_WATER_OUT2_F	svar /10	—
0x4247	VAR_IN_TEMP_WATER_OUTLET_TARGET_F	svar /10	✅ named
0x428C	VAR_IN_TEMP_MIXING_VALVE_F	svar /10	—
0x42CA	VAR_IN_MODULATING_VALVE_1	uvar	—
0x42CB	VAR_IN_MODULATING_VALVE_2	uvar	—
0x42CD	VAR_IN_TEMP_WATER_IN2_F	svar /10	—
0x42D7	VAR_IN_TEMP_WATER_OUTLET_TARGET_ZONE2_F	svar /10	—
0x42D8	VAR_IN_TEMP_WATER_OUTLET_ZONE1_F	svar /10	—
0x42D9	VAR_IN_TEMP_WATER_OUTLET_ZONE2_F	svar /10	—
0x42E8	VAR_IN_FLOW_SENSOR_VOLTAGE	uvar /10	—
0x42E9	VAR_IN_FLOW_SENSOR_CALC	svar /10	—

Indoor — hot water (DHW)

msg	name	type	covered
0x4065	ENUM_IN_WATER_HEATER_POWER	enum	✅ named
0x4066	ENUM_IN_WATER_HEATER_MODE	enum	✅ named
0x4235	VAR_IN_TEMP_WATER_HEATER_TARGET_F	svar /10	✅ named
0x4237	VAR_IN_TEMP_WATER_TANK_F	svar /10	✅ named

Indoor — refrigerant + EEV

msg	name	type	covered
0x420B	VAR_in_temp_discharge	svar /10	—
0x4217	VAR_in_eev_value_real_1	uvar	—
0x4218	VAR_in_eev_value_real_2	uvar	—
0x422A	VAR_IN_TEMP_DISCHARGE_COOL_TARGET_F	svar /10	—
0x422B	VAR_IN_TEMP_DISCHARGE_HEAT_TARGET_F	svar /10	—
0x429F	VAR_IN_FAN_CURRENT_RPM_SUCTION1	uvar	—
0x42A1	VAR_IN_FAN_CURRENT_RPM_SUCTION2	uvar	—
0x42A3	VAR_IN_FAN_CURRENT_RPM_SUCTION3	uvar	—

Indoor — water-law / FSV (heating curve)

msg	name	type	covered
0x4248	VAR_IN_TEMP_WATER_LAW_TARGET_F	svar /10	—
0x424A	VAR_IN_FSV_1011	svar /10	—
0x424B	VAR_IN_FSV_1012	svar /10	—
0x424C	VAR_IN_FSV_1021	svar /10	—
0x424D	VAR_IN_FSV_1022	svar /10	—
0x424E	VAR_IN_FSV_1031	svar /10	—
0x424F	VAR_IN_FSV_1032	svar /10	—
0x4250	VAR_IN_FSV_1041	svar /10	—
0x4251	VAR_IN_FSV_1042	svar /10	—
0x4252	VAR_IN_FSV_1051	svar /10	—
0x4253	VAR_IN_FSV_1052	svar /10	—
0x4254	VAR_IN_FSV_2011	svar /10	—
0x4255	VAR_IN_FSV_2012	svar /10	—
0x4256	VAR_IN_FSV_2021	svar /10	—
0x4257	VAR_IN_FSV_2022	svar /10	—
0x4258	VAR_IN_FSV_2031	svar /10	—
0x4259	VAR_IN_FSV_2032	svar /10	—
0x425A	VAR_IN_FSV_2051	svar /10	—
0x425B	VAR_IN_FSV_2052	svar /10	—
0x425C	VAR_IN_FSV_2061	svar /10	—
0x425D	VAR_IN_FSV_2062	svar /10	—
0x425E	VAR_IN_FSV_2071	svar /10	—
0x425F	VAR_IN_FSV_2072	svar /10	—
0x4260	VAR_IN_FSV_3021	svar /10	✅ named
0x4261	VAR_IN_FSV_3022	svar /10	✅ named
0x4262	VAR_IN_FSV_3023	svar /10	✅ named
0x4263	VAR_IN_FSV_3024	uvar	—
0x4264	VAR_IN_FSV_3025	uvar	—
0x4265	VAR_IN_FSV_3026	uvar	—
0x4266	VAR_IN_FSV_3032	uvar	—
0x4267	VAR_IN_FSV_3033	svar /10	—
0x4269	VAR_IN_FSV_3043	uvar	—
0x426A	VAR_IN_FSV_3044	svar /10	—
0x426B	VAR_IN_FSV_3045	svar	—
0x426C	VAR_IN_FSV_3052	svar /0.1	—
0x426D	VAR_IN_FSV_4012	svar /10	—
0x426E	VAR_IN_FSV_4013	svar /10	—
0x4270	VAR_IN_FSV_4024	svar /10	—
0x4271	VAR_IN_FSV_4025	svar /10	—
0x4272	VAR_IN_FSV_4033	svar /10	—
0x4273	VAR_IN_FSV_5011	svar /10	—
0x4274	VAR_IN_FSV_5012	svar /10	—
0x4275	VAR_IN_FSV_5013	svar /10	—
0x4276	VAR_IN_FSV_5014	svar /10	—
0x4277	VAR_IN_FSV_5015	svar /10	—
0x4278	VAR_IN_FSV_5016	svar /10	—
0x4279	VAR_IN_FSV_5017	svar /10	—
0x427A	VAR_IN_FSV_5018	svar /10	—
0x427B	VAR_IN_FSV_5019	svar /10	—
0x427C	VAR_IN_FSV_5021	svar /10	—
0x427D	VAR_IN_FSV_5031	uvar	—
0x427E	VAR_IN_FSV_5032	uvar	—
0x427F	VAR_IN_TEMP_WATER_LAW_F	svar /10	—
0x4286	VAR_IN_FSV_4042	uvar /10	—
0x4287	VAR_IN_FSV_4043	uvar /10	—
0x4288	VAR_IN_FSV_4045	uvar	—
0x4289	VAR_IN_FSV_4046	uvar /0.1	—
0x428A	VAR_IN_FSV_4052	uvar /10	—
0x42CE	VAR_IN_FSV_3046	uvar	—
0x42DB	VAR_IN_FSV_5082	uvar /10	—
0x42DC	VAR_IN_FSV_5083	uvar /10	—
0x42DD	VAR_IN_FSV_5092	uvar /10	—
0x42DE	VAR_IN_FSV_5093	uvar /10	—
0x42ED	VAR_IN_FSV_3081	svar	—
0x42EE	VAR_IN_FSV_3082	svar	—
0x42EF	VAR_IN_FSV_3083	svar	—
0x42F0	VAR_IN_FSV_5023	svar /10	—

Indoor — system

msg	name	type	covered
0x4211	VAR_in_capacity_request	uvar /8.6	✅ named
0x4212	VAR_in_capacity_absolute	uvar /8.6	—
0x4302	VAR_IN_CAPACITY_VENTILATION_REQUEST	uvar /8.6	—
0x440A	LVAR_In_Device_staus_Heatpump_Boiler	uvar	—
0x4415	LVAR_IN_AUTO_STATIC_PRESSURE	uvar	—
0x4418	LVAR_IN_EMPTY_ROOM_CONTROL_DATA	uvar	—
0x441B	LVAR_IN_ENTER_ROOM_CONTROL_DATA	uvar	—
0x441F	LVAR_IN_ETO_COOL_CONTROL_DATA	uvar	—
0x4420	LVAR_IN_ETO_HEAT_CONTROL_DATA	uvar	—

Outdoor — power & state

msg	name	type	covered
0x8000	ENUM_OUT_OPERATION_SERVICE_OP	enum	—
0x8001	ENUM_out_operation_odu_mode	enum	✅ named
0x8003	ENUM_out_operation_heatcool	enum	✅ named
0x803C	ENUM_out_operation_auto_inspect_step	enum	—
0x8046	ENUM_out_op_test_op_complete	enum	—
0x808E	ENUM_OUT_OP_CHECK_REF_STEP	enum	—
0x80A5	ENUM_OUT_STATE_BACKUP_OPER	enum	—
0x80A6	ENUM_OUT_STATE_COMP_PROTECT_OPER	enum	—
0x80B4	ENUM_OUT_STATE_ACCUM_VALVE_ONOFF	enum	—
0x80BE	ENUM_OUT_OP_A2_CURRENTMODE	enum	—

Outdoor — compressor

msg	name	type	covered
0x8010	ENUM_out_load_comp1	enum	—
0x8011	ENUM_out_load_comp2	enum	—
0x8012	ENUM_out_load_comp3	enum	—
0x8202	VAR_out_install_Comp_Num	uvar	—
0x8236	VAR_out_control_order_cfreq_comp1	uvar	—
0x8237	VAR_out_control_target_cfreq_comp1	uvar	—
0x8238	VAR_out_control_cfreq_comp1	uvar	—
0x8274	VAR_out_control_order_cfreq_comp2	uvar	✅ named
0x8275	VAR_out_control_target_cfreq_comp2	uvar	✅ named
0x8276	VAR_out_control_cfreq_comp2	uvar	—
0x8405	LVAR_out_load_comp1_running_time	uvar	—

Outdoor — EEV

msg	name	type	covered
0x8020	ENUM_out_load_outeev	enum	—
0x8229	VAR_out_load_outeev1	uvar	—
0x822A	VAR_out_load_outeev2	uvar	—
0x822B	VAR_OUT_LOAD_OUTEEV3	uvar	—
0x822C	VAR_OUT_LOAD_OUTEEV4	uvar	—
0x822D	VAR_OUT_LOAD_OUTEEV5	uvar	—
0x822E	VAR_out_load_evieev	uvar	—
0x826B	VAR_out_mcu_sensor_subcooler_in	svar /10	—
0x826C	VAR_out_mcu_sensor_subcooler_out	svar /10	—
0x826D	VAR_out_mcu_subcooler_eev	uvar	—
0x826E	VAR_out_mcu_change_over_eev1	uvar	—
0x826F	VAR_out_mcu_change_over_eev2	uvar	—
0x8270	VAR_out_mcu_change_over_eev3	uvar	—
0x8271	VAR_out_mcu_change_over_eev4	uvar	—
0x8272	VAR_out_mcu_change_over_eev5	uvar	—
0x8273	VAR_out_mcu_change_over_eev6	uvar	—
0x82D2	VAR_OUT_SUB_COND_EEV_STEP	uvar	—
0x82E8	VAR_OUT_LOAD_MCU_HR_BYPASS_EEV	uvar	—
0x82FC	VAR_OUT_LOAD_EVI_SOL_EEV	svar	—

Outdoor — fan

msg	name	type	covered
0x823D	VAR_out_load_fanrpm1	uvar	—
0x823E	VAR_out_load_fanrpm2	uvar	—

Outdoor — temperatures (discharge, suction, condenser)

msg	name	type	covered
0x8204	VAR_out_sensor_airout	svar /10	✅ named
0x820A	VAR_out_sensor_discharge1	svar /10	—
0x820C	VAR_out_sensor_discharge2	svar /10	—
0x820E	VAR_out_sensor_discharge3	svar /10	—
0x8218	VAR_out_sensor_condout	svar /10	—
0x821A	VAR_out_sensor_suction	svar /10	—
0x8223	VAR_out_control_target_discharge	svar /10	—
0x829A	VAR_out_sensor_suction2_1sec	svar /10	—
0x829F	VAR_out_sensor_sat_temp_high_pressure	svar /10	—
0x82A0	VAR_out_sensor_sat_temp_low_pressure	svar /10	—
0x82BD	VAR_OUT_LOAD_FLUX_VARIABLE_VALVE	svar /10	—
0x82BF	VAR_out_sensor_condout2	svar /10	—
0x82E7	VAR_OUT_SENSOR_TOTAL_SUCTION	svar /10	—
0x82F9	VAR_OUT_SENSOR_SUCTION3_1SEC	svar /10	—

Outdoor — electrical (power, current, voltage, energy)

msg	name	type	covered
0x8413	LVAR_OUT_CONTROL_WATTMETER_1W_1MIN_SUM	uvar /1000	✅ named

Outdoor — defrost

msg	name	type	covered
0x402E	ENUM_in_state_defrost_mode	enum	—
0x8061	ENUM_OUT_DEICE_STEP_INDOOR	enum	—

Outdoor — valves (4-way, hot gas, etc.)

msg	name	type	covered
0x8017	ENUM_out_load_hotgas	enum	—
0x8018	ENUM_out_load_hotgas2	enum	—
0x8019	ENUM_OUT_LOAD_LIQUID	enum	—
0x801A	ENUM_out_load_4way	enum	✅ named
0x8021	ENUM_out_load_evi_bypass	enum	—
0x802A	ENUM_OUT_LOAD_4WAY2	enum	—
0x8034	ENUM_out_load_liquidtube	enum	—
0x80C1	ENUM_OUT_LOAD_A2A_VALVE	enum	—
0x82CA	VAR_OUT_OIL_BYPASS_VALVE	uvar	—

Other / uncategorised

msg	name	type	covered
0x0025	ENUM_AD_MULTI_TENANT_NO	enum	—
0x0202	VAR_ad_error_code1	uvar	—
0x0207	VAR_ad_install_number_indoor	uvar	—
0x0211	VAR_ad_install_number_mcu	uvar	—
0x0401	LVAR_AD_ADDRESS_MAIN	uvar	—
0x0402	LVAR_ad_address_rmc	uvar	—
0x0408	LVAR_AD_ADDRESS_SETUP	uvar	—
0x0409	LVAR_ad_install_level_all	uvar	—
0x040A	LVAR_ad_install_level_operation_power	uvar	—
0x040B	LVAR_ad_install_level_operation_mode	uvar	—
0x040C	LVAR_ad_install_level_fan_mode	uvar	—
0x040D	LVAR_ad_install_level_fan_direction	uvar	—
0x040E	LVAR_ad_install_level_temp_target	uvar	—
0x040F	LVAR_ad_install_level_keep_individual_control	uvar	—
0x0410	LVAR_ad_install_level_operation_mode_only	uvar	—
0x0411	LVAR_AD_INSTALL_LEVEL_COOL_MODE_UPPER	uvar	—
0x0412	LVAR_AD_INSTALL_LEVEL_COOL_MODE_LOWER	uvar	—
0x0413	LVAR_AD_INSTALL_LEVEL_HEAT_MODE_UPPER	uvar	—
0x0414	LVAR_AD_INSTALL_LEVEL_HEAT_MODE_LOWER	uvar	—
0x0415	LVAR_ad_install_level_contact_control	uvar	—
0x0416	LVAR_ad_install_level_key_operation_input	uvar	—
0x0448	LVAR_AD_MCU_PORT_SETUP	uvar	—
0x0600	STR_ad_option_basic	struct	—
0x0601	STR_ad_option_install	struct	—
0x0602	STR_ad_option_install_2	struct	—
0x0603	STR_ad_option_cycle	struct	—
0x0605	STR_ad_info_equip_position	struct	—
0x0607	STR_ad_id_serial_number	struct	—
0x0608	STR_ad_dbcode_micom_main	struct	—
0x060C	STR_ad_dbcode_eeprom	struct	—
0x061A	STR_AD_PRODUCT_MODEL_NAME	struct	—
0x061C	STR_AD_PRODUCT_MAC_ADDRESS	struct	—
0x061F	STR_AD_ID_MODEL_NAME	struct	—
0x200F	ENUM_NM_network_positinon_layer	enum	—
0x2010	ENUM_NM_network_tracking_state	enum	—
0x4028	ENUM_IN_STATE_THERMO	enum	—
0x402F	ENUM_IN_MTFC	enum	—
0x4046	ENUM_IN_SILENCE	enum	—
0x4060	ENUM_IN_ALTERNATIVE_MODE	enum	✅ named
0x4069	ENUM_IN_THERMOSTAT1	enum	—
0x406A	ENUM_IN_THERMOSTAT2	enum	—
0x406C	ENUM_IN_BACKUP_HEATER	enum	—
0x406D	ENUM_IN_OUTING_MODE	enum	—
0x406E	ENUM_IN_QUIET_MODE	enum	✅ named
0x406F	ENUM_IN_REFERENCE_EHS_TEMP	enum	—
0x4070	ENUM_IN_DISCHAGE_TEMP_CONTROL	enum	—
0x4076	ENUM_IN_ROOM_TEMP_SENSOR	enum	—
0x4087	ENUM_IN_BOOSTER_HEATER	enum	—
0x4093	ENUM_IN_FSV_2041	enum	—
0x4094	ENUM_IN_FSV_2081	enum	—
0x4095	ENUM_IN_FSV_2091	enum	—
0x4096	ENUM_IN_FSV_2092	enum	—
0x4097	ENUM_IN_FSV_3011	enum	—
0x4098	ENUM_IN_FSV_3031	enum	—
0x4099	ENUM_IN_FSV_3041	enum	—
0x409A	ENUM_IN_FSV_3042	enum	—
0x409B	ENUM_IN_FSV_3051	enum	—
0x409C	ENUM_IN_FSV_3061	enum	—
0x409D	ENUM_IN_FSV_3071	enum	—
0x409E	ENUM_IN_FSV_4011	enum	—
0x409F	ENUM_IN_FSV_4021	enum	—
0x40A0	ENUM_IN_FSV_4022	enum	—
0x40A1	ENUM_IN_FSV_4023	enum	—
0x40A2	ENUM_IN_FSV_4031	enum	—
0x40A3	ENUM_IN_FSV_4032	enum	—
0x40A4	ENUM_IN_FSV_5041	enum	—
0x40A5	ENUM_IN_FSV_5042	enum	—
0x40A6	ENUM_IN_FSV_5043	enum	—
0x40A7	ENUM_IN_FSV_5051	enum	—
0x40B4	ENUM_IN_FSV_5061	enum	—
0x40BB	ENUM_IN_STATE_AUTO_STATIC_PRESSURE_RUNNING	enum	—
0x40BC	ENUM_IN_STATE_KEY_TAG	enum	—
0x40BD	ENUM_IN_EMPTY_ROOM_CONTROL_USED	enum	—
0x40C0	ENUM_IN_FSV_4041	enum	—
0x40C1	ENUM_IN_FSV_4044	enum	—
0x40C2	ENUM_IN_FSV_4051	enum	—
0x40C3	ENUM_IN_FSV_4053	enum	—
0x40C5	ENUM_IN_THERMOSTAT_WATER_HEATER	enum	—
0x40D5	ENUM_IN_ENTER_ROOM_CONTROL_USED	enum	—
0x40D6	ENUM_IN_ERROR_HISTORY_CLEAR_FOR_HASS	enum	—
0x40E7	ENUM_IN_CHILLER_WATERLAW_SENSOR	enum	—
0x40F7	ENUM_IN_CHILLER_WATERLAW_ON_OFF	enum	—
0x40FB	ENUM_IN_CHILLLER_SETTING_SILENT_LEVEL	enum	—
0x40FC	ENUM_IN_CHILLER_SETTING_DEMAND_LEVEL	enum	—
0x4101	ENUM_IN_CHILLER_EXT_WATER_OUT_INPUT	enum	—
0x4105	ENUM_IN_ENTHALPY_CONTROL_STATE	enum	—
0x4107	ENUM_IN_FSV_5033	enum	—
0x4108	ENUM_IN_TDM_INDOOR_TYPE	enum	—
0x410D	ENUM_IN_FREE_COOLING_STATE	enum	—
0x411A	ENUM_IN_FSV_4061	enum	—
0x411B	ENUM_IN_FSV_5081	enum	—
0x411C	ENUM_IN_FSV_5091	enum	—
0x411D	ENUM_IN_FSV_5094	enum	—
0x4123	ENUM_IN_PV_CONTACT_STATE	enum	—
0x4124	ENUM_IN_SG_READY_MODE_STATE	enum	—
0x4125	ENUM_IN_FSV_LOAD_SAVE	enum	—
0x4127	ENUM_IN_FSV_2093	enum	—
0x4128	ENUM_IN_FSV_5022	enum	—
0x412A	ENUM_IN_FSV_2094	enum	—
0x412D	ENUM_IN_FSV_LOAD_SAVE	enum	—
0x4147	ENUM_IN_GAS_LEVEL	enum	—
0x4149	ENUM_IN_DIFFUSER_OPERATION_POWER	enum	—
0x4205	VAR_in_temp_eva_in_f	svar /10	✅ named
0x4206	VAR_in_temp_eva_out_f	svar /10	✅ named
0x4207	VAR_IN_TEMP_ELECTRIC_HEATER_F	svar	—
0x421B	VAR_IN_SENSOR_CO2_PPM	uvar	—
0x4297	VAR_AHU_PANEL_SA_TEMP	svar	—
0x4298	VAR_AHU_PANEL_SA_HUMIDITY	svar	—
0x42A5	VAR_IN_TEMP_PANEL_AIR_COOL1_F	svar /10	—
0x42A6	VAR_IN_TEMP_PANEL_AIR_COOL2_F	svar /10	—
0x42A7	VAR_IN_TEMP_PANEL_ROOM_COOL1_F	svar /10	—
0x42A8	VAR_IN_TEMP_PANEL_ROOM_COOL2_F	svar /10	—
0x42A9	VAR_IN_TEMP_PANEL_TARGET_COOL1_F	svar /10	—
0x42AA	VAR_IN_TEMP_PANEL_TARGET_COOL2_F	svar /10	—
0x42AB	VAR_IN_TEMP_PANEL_AIR_HEAT1_F	svar /10	—
0x42AC	VAR_IN_TEMP_PANEL_AIR_HEAT2_F	svar /10	—
0x42AD	VAR_IN_TEMP_PANEL_ROOM_HEAT1_F	svar /10	—
0x42AE	VAR_IN_TEMP_PANEL_ROOM_HEAT2_F	svar /10	—
0x42AF	VAR_IN_TEMP_PANEL_TARGET_HEAT1_F	svar /10	—
0x42B0	VAR_IN_TEMP_PANEL_TARGET_HEAT2_F	svar /10	—
0x42B1	VAR_IN_MCC_GROUP_MODULE_ADDRESS	uvar	—
0x42B2	VAR_IN_MCC_GROUP_MAIN	uvar	—
0x42B3	VAR_IN_MCC_MODULE_MAIN	uvar	—
0x42C2	VAR_IN_TEMP_EVA2_IN_F	svar /10	—
0x42C3	VAR_IN_TEMP_EVA2_OUT_F	svar /10	—
0x42C4	VAR_IN_CHILLER_PHE_IN_P	svar /100	—
0x42C5	VAR_IN_CHILLER_PHE_OUT_P	svar /100	—
0x42C9	VAR_IN_CHILLER_EXTERNAL_TEMPERATURE	svar /10	—
0x42CC	VAR_IN_MODULATING_FAN	uvar	—
0x42CF	VAR_IN_ENTHALPY_SENSOR_OUTPUT	uvar /10	—
0x42D0	VAR_IN_EXT_VARIABLE_DAMPER_OUTPUT	uvar	—
0x42D1	VAR_IN_DUST_SENSOR_PM10_0_VALUE	uvar	✅ named
0x42D2	VAR_IN_DUST_SENSOR_PM2_5_VALUE	uvar	✅ named
0x42D3	VAR_IN_DUST_SENSOR_PM1_0_VALUE	uvar	✅ named
0x42D4	VAR_IN_TEMP_ZONE2_F	svar /10	—
0x42D6	VAR_IN_TEMP_TARGET_ZONE2_F	svar /10	—
0x4604	STR_IN_INSTALL_INDOOR_SETUP_INFO	struct	—
0x461E	STR_IN_ERROR_HISTORY_FOR_HASS	struct	—
0x8013	ENUM_out_load_cch1	enum	—
0x8014	ENUM_out_load_cch2	enum	—
0x801F	ENUM_out_load_maincool	enum	—
0x8022	ENUM_out_load_evi_sol1	enum	—
0x8023	ENUM_out_load_evi_sol2	enum	—
0x8025	ENUM_out_load_gascharge	enum	—
0x8026	ENUM_out_load_water	enum	—
0x8027	ENUM_out_load_pumpout	enum	—
0x8037	ENUM_out_load_accreturn	enum	—
0x803B	ENUM_out_load_flow_switch	enum	—
0x8049	ENUM_out_mcu_load_cool_a	enum	—
0x804A	ENUM_out_mcu_load_heat_a	enum	—
0x804B	ENUM_out_mcu_load_cool_b	enum	—
0x804C	ENUM_out_mcu_load_heat_b	enum	—
0x804D	ENUM_out_mcu_load_cool_c	enum	—
0x804E	ENUM_out_mcu_load_heat_c	enum	—
0x804F	ENUM_out_mcu_load_cool_d	enum	—
0x8050	ENUM_out_mcu_load_heat_d	enum	—
0x8051	ENUM_out_mcu_load_cool_e	enum	—
0x8052	ENUM_out_mcu_load_heat_e	enum	—
0x8053	ENUM_out_mcu_load_cool_f	enum	—
0x8054	ENUM_out_mcu_load_heat_f	enum	—
0x8055	ENUM_out_mcu_load_liquid	enum	—
0x8058	ENUM_out_mcu_port0_indoor_addr	enum	—
0x8059	ENUM_out_mcu_port1_indoor_addr	enum	—
0x805A	ENUM_out_mcu_port2_indoor_addr	enum	—
0x805B	ENUM_out_mcu_port3_indoor_addr	enum	—
0x805C	ENUM_out_mcu_port4_indoor_addr	enum	—
0x805D	ENUM_out_mcu_port5_indoor_addr	enum	—
0x8092	ENUM_OUT_INSTALL_ODU_COUNT	enum	—
0x8099	ENUM_OUT_CONTROL_FAN_NUM	enum	—
0x809C	ENUM_OUT_CHECK_REF_RESULT	enum	—
0x809E	ENUM_OUT_LOAD_CBOX_COOLING_FAN	enum	—
0x80AF	ENUM_OUT_LOAD_BASEHEATER	enum	—
0x80B8	ENUM_OUT_LOAD_OIL_BYPASS1	enum	—
0x80B9	ENUM_OUT_LOAD_OIL_BYPASS2	enum	—
0x80D7	ENUM_OUT_LOAD_PHEHEATER	enum	—
0x80D8	ENUM_OUT_EHS_WATEROUT_TYPE	enum	—
0x8206	VAR_out_sensor_highpress	svar /10	—
0x8208	VAR_out_sensor_lowpress	svar /10	—
0x8217	VAR_out_sensor_ct1	uvar /10	✅ named
0x821C	VAR_out_sensor_doubletube	svar /10	—
0x821E	VAR_outcd__sensor_eviin	svar /10	—
0x8220	VAR_out_sensor_eviout	svar /10	—
0x8226	VAR_out_load_fanstep1	uvar	—
0x8235	VAR_out_error_code	uvar	✅ named
0x823B	VAR_out_sensor_dclink_voltage	uvar	—
0x824F	VAR_out_control_refrigerants_volume	uvar /10	—
0x8254	VAR_out_sensor_IPM1	svar /10	—
0x8255	VAR_out_sensor_IPM2	svar /10	—
0x825E	VAR_out_sensor_temp_water	svar /10	—
0x825F	VAR_OUT_SENSOR_PIPEIN1	svar /10	—
0x8260	VAR_OUT_SENSOR_PIPEIN2	svar /10	—
0x8261	VAR_OUT_SENSOR_PIPEIN3	svar /10	✅ named
0x8262	VAR_OUT_SENSOR_PIPEIN4	svar /10	✅ named
0x8263	VAR_OUT_SENSOR_PIPEIN5	svar /10	✅ named
0x8264	VAR_OUT_SENSOR_PIPEOUT1	svar /10	✅ named
0x8265	VAR_OUT_SENSOR_PIPEOUT2	svar /10	✅ named
0x8266	VAR_OUT_SENSOR_PIPEOUT3	svar /10	✅ named
0x8267	VAR_OUT_SENSOR_PIPEOUT4	svar /10	✅ named
0x8268	VAR_OUT_SENSOR_PIPEOUT5	svar /10	✅ named
0x8277	VAR_out_sensor_ct2	uvar /10	—
0x8278	VAR_OUT_SENSOR_OCT1	uvar /10	—
0x827A	VAR_out_control_dsh1	svar /10	—
0x8280	VAR_out_sensor_top1	svar /10	✅ named
0x8281	VAR_out_sensor_top2	svar /10	—
0x8287	VAR_out_install_capa	uvar	—
0x82A8	VAR_out_control_idu_total_abscapa	svar	—
0x82AF	VAR_OUT_INSTALL_COND_SIZE	uvar	—
0x82B8	VAR_out_sensor_midpress	svar /10	—
0x82BC	VAR_OUT_PROJECT_CODE	svar	✅ named
0x82BE	VAR_OUT_SENSOR_CONTROL_BOX	svar /10	—
0x82C8	VAR_OUT_SENSOR_ACCUM_TEMP	svar /10	—
0x82C9	VAR_OUT_SENSOR_ENGINE_WATER_TEMP	svar /10	—
0x82CB	VAR_OUT_SUCTION_OVER_HEAT	uvar /10	—
0x82CC	VAR_OUT_SUB_COND_OVER_HEAT	uvar /10	—
0x82CD	VAR_OUT_OVER_COOL	uvar /10	—
0x82CE	VAR_OUT_COND_OVER_COOL	uvar /10	—
0x82CF	VAR_OUT_ENGINE_RPM	uvar /10	—
0x82D0	VAR_OUT_APPEARANCE_RPM	uvar /10	—
0x82DB	VAR_OUT_PHASE_CURRENT	uvar	✅ named
0x82DE	VAR_OUT_SENSOR_EVAIN	svar /10	—
0x82DF	VAR_OUT_SENSOR_TW1	svar /10	—
0x82E0	VAR_OUT_SENSOR_TW2	svar /10	—
0x82E3	VAR_OUT_PRODUCT_OPTION_CAPA	uvar /10	✅ named
0x82E9	VAR_OUT_SENSOR_PFCM1	svar /10	—
0x82F5	VAR_OUT_HIGH_OVERLOAD_DETECT	uvar	—
0x840B	LVAR_OUT_AUTO_INSPECT_RESULT0	uvar	—
0x840C	LVAR_OUT_AUTO_INSPECT_RESULT1	uvar	—
0x8601	STR_out_install_inverter_and_bootloader_info	struct	—
0x860A	STR_out_Base_Option	struct	—
0x860D	STR_OUT_INSTALL_MODEL_INFO	struct	—
0x860F	STR_OUT_INSTALL_OUTDOOR_SETUP_INFO	struct	—
0x8613	STR_OUT_REF_CHECK_INFO	struct	—

---

Summary: 51 of 425 listed registers are currently decoded by HeatSync (51 via dedicated callbacks, 0 via custom-sensor capture). The rest are observable in /sniffer when broadcast and can be added by extending ha_bridge.cpp::set_custom_sensor.