Downlink Commands for Thermostat Parameters

This section describes the downlink commands when control permission is Thermostat.

Configure Installation Parameters

Command description:
Item Channel Type Byte Value Example
Wiring Settings ff ca 3 Byte 1:
Bit Wire Value
7-6 W1 00=Disable, 01=Enable
5-4 O/B
3-2 G/GH
1-0 Y1
Byte 2:
Bit Wire Value
7-6 W2/AUX 00=Disable, 01=W2, 10=AUX
5-4 PEK 00=Disable, 01=Enable
3-2 DI
1-0 E
Byte 3: 00=Disable, 01=Y2, 02=GL		 Enable W1, Y1, Y2, G, O/B: ffca550001
Reversing Valve ff b5 1 00=Energize on heat, 01=Energize on cool Set Energize on heat: ffb500
Fan Control during Heating f9 62 1 00=Furnace or Boiler, 01=Thermostat Set thermostat: f96201
Compressor and Auxiliary Heat Linkage f9 46 1 00=disable, 01=enable Enable: f94601
Freeze Protection ff b0 3 Byte 1: 00=disable (default), 01=enable

Byte 2-3: Protection temperature, INT16/10, unit: °C, range: 1-5, default: 3

 Enable and the protection temperature is 1 °C: ffb0010a00
System Protection f9 47 2 Byte 1: 00=disable, 01=enable

Byte 2: Min. running duration, unit: min, range: 1-60, default: 5

 Enable and duration is 10 mins: f947010a
W2/Y2 Auxiliary Mode f9 3b 1 30=Y2 and W2 disable (default), 11=Y2 enable only, 22=W2 enable only, 33=Y2 and W2 enable Enable Y2 auxiliary mode: f93b11
Custom Temperature Control Stage Setting:
Item Channel Type Byte Description Example
Custom Temperature Control Stage f9 80 1 00=disable (default), 01=enable Enable: f98001
Stage-1 Heat f9 81 1 Per bit 0=disable, 1=enable
  • Bit 0: Y1
  • Bit 1: Y2
  • Bit 2: W1
  • Bit 3: W2
  • Bit 4: E (only work for EM heat)
  • Bit 7-5: 000
 Stage-1 heat enables Y1+Y2: f98103
Note: If the lower stage is not configured, the higher stage command will be invalid.
Stage-2 Heat 82
Stage-3 Heat 83
Stage-4 Heat 84
Stage-5 Heat 85
EM Heat 86
Stage-1 Cool 87
Stage-2 Cool 88
Stage-3 Cool 89

Configure Temperature Control Basic Parameters

The device provide multiple kinds of commands for easy configuration.

Command description:
Item Channel Type Byte Value Example
Temperature Control Enable f9 5d 1 Per bit 0=disable, 1=enable
Bit Mode
7-4 0000
3 Auto
2 Cool
1 EM Heat
0 Heat
Enable Heat, Cool and Auto: f95d0d
Temperature Control Mode ff fb 1 00=Heat, 01=EM Heat, 02=Cool, 03=Auto Auto: fffb03
Target Temperature ff fa 3 Byte 1: 00=Heat, 01=EM Heat, 02=Cool, 03= Auto, 04=Auto-Heat (Dual Target), 05=Auto-Cool (Dual Target)

Byte 2-3: Target value,  INT16/10, unit: °C, range: 5-35

 Cool mode target temperature is 21.6°C: fffa02d800
System Status + Temperature Control Mode + Target Temperature f9 45 4 Byte 1: 00=system off, 01=system on

Byte 2: 00=Heat, 01=EM Heat, 02=Cool, 03=Auto
Byte 3-4: Target value, INT16/10, unit: °C, range: 5-35

 System is On, control mode is Cool, target temperature is 25°C: f9450102fa00
Target Temperature Resolution f9 41 1 00=0.5, 01=1 /
Target Temperature Mode f9 58 1 00=Single Target, 01=Dual Target /
Temperature Tolerance (Single Target) ff b8 2 Byte 1: Target temperature tolerance, UINT8/10, unit: °C

Byte 2: Temperature control, tolerance, UINT8/10, unit: °C

 Both tolerances are 1°C: ffb80a0a
Temperature Tolerance (Dual Target) f9 5a 2 Byte 1: 00=Heating tolerance,01=Cooling tolerance

Byte 2: Tolerance value, UINT8/10, Unit: °C, range: 0.1-5, default: 2

 Heating tolerance is 1°C: f95a000a
Target Temperature Regulation Range f9 42 5 Byte 1: 00=Heat, 01=EM Heat, 02=Cool, 03=Auto

Byte 2-3: Min. range value, INT16/10, unit: °C, range: 5-35
Byte 4-5: Max. range value,INT16/10, unit: °C, range: 5-35

Note: Max. -Min. >1
 Cool mode target temperature range is 15 - 30°C: f9420296002c01

Configure Occupancy Mode Parameters

Command description:
Item Channel Type Byte Value Example
Occupancy Mode f9 27 1 01=Off (default), 02=Occupied, 03=Unoccupied Switch to Occupied: f92702
Occupied Delay f9 28 1 Range: 1-60, Unit: min, default: ff=Disable The delay time is 60 minutes: f9283c
When Occupancy Mode is Occupied:
Item Channel Type Byte Value Example
Cooling Target Temperature f9 64 2 INT16/10, unit: °C, range: 5-35 The cooling target temperature is 21.6°C: f964d800
Heating Target Temperature f9 65 2 INT16/10, unit: °C, range: 5-35
Cooling Target Temperature Tolerance f9 6a 1 UINT8/10, Unit: °C, range: 0.1-5, default: 1 The cooling target temperature tolerance is 2°C: f96a14
Heating Target Temperature Tolerance f9 6b 1 UINT8/10, Unit: °C, range: 0.1-5, default: 1
Deadband f9 32 1 UINT8/10, Unit: °C, range: 1-10, default: 5 Deadband is 2°C: f93214

When Occupancy Mode is Unoccupied:

Item Channel Type Byte Value Example
Cooling Target Temperature f9 66 2 INT16/10, unit: °C, range: 5-35 The cooling target temperature is 21.6°C: f966d800
Heating Target Temperature f9 67 2 INT16/10, unit: °C, range: 5-35
Cooling Target Temperature Tolerance f9 6c 1 UINT8/10, Unit: °C, range: 0.1-5, default: 2 The cooling target temperature tolerance is 2°C: f96c14
Heating Target Temperature Tolerance f9 6d 1 UINT8/10, Unit: °C, range: 0.1-5, default: 2
Deadband f9 32 1 UINT8/10, Unit: °C, range: 1-10, default: 5 Deadband is 2°C: f93214
When Occupancy Mode is Unoccupied or Occupied, the thermostat supports configuring central temperature as the target temperature, and adjustment tolerance to define the regulation range (=central temperature +/ adjustment tolerance). This is mainly used for BACnet downlink.
Item Channel Type Byte Value Example
Cooling Central Temperature f9 72 2 UINT16/10, unit: °C, range: 5-35 Cooling central temperature is 21.6 °C: f972d800
Heating Central Temperature f9 73 2 UINT16/10, unit: °C, range: 5-35
Cooling Adjustment Tolerance f9 74 2 UINT16/10, unit: °C, range: 0.5-16 The cooling adjust tolerance is 5°C: f9743200
Heating Adjustment Tolerance f9 75 2 UINT16/10, unit: °C, range: 0.5-16

Configure Unilateral Tolerance

Item Channel Type Byte Value Example
Unilateral Tolerance f9 2b 1 00=Disable (default), 01=Enable Enable: f92b01

Configure Fan Mode Parameters

Command description:
Item Channel Type Byte Value Example
Fan Mode ff b6 1 00=Auto (default), 01=On, 02=Circulate Set auto mode: ffb600
Fan Circulate Operation Time f9 06 1 UINT8, unit: min/h, range: 5-55, default: 30 Operation time is 10 minutes: f9060a
Fan Delay under Auto Mode f9 44 3 Byte 1: 00=disable (default), 01=enable

Byte 2-3: Duration, unit: s, range: 1-3600, default: 60

 Enable and the duration is 300s: f944012c01
Regulate Humidity f9 07 2 Byte 1: 00=disable (default), 01=enable

Byte 2-3: Regulate interval, unit: min/h, range: 5-55, default: 30

 Enable and the regulate interval is 10 minutes: f907010a

Temperature Control Stage Switch

Command description:
Item Channel Type Byte Value Example
Temperature Delta f9 43 3 Byte 1: 00

Byte 2: ΔT1, UINT8/10, unit: unit: °C, range: 1-10, default: 3
Byte 3: ΔT2, UINT8/10, unit: unit: °C, range: 1-10, default: 5

Note: ΔT2>ΔT1
 ΔT1 is 1°C , ΔT2 is 2°C: f943000a14
Setforward/Setback f9 1b 2 Setforward: 0100=disable,0101=enable

Setback: 0200=disable, 0202=enable
Setback and setforward: 0300= disable, 0303= enable

 Enable both: f91b0303
Stage-up Switch ff b9 3 Byte 1: 00=Heat, 01=Cool

Byte 2: Change time, unit: min, range: 1-10, default: 5
Byte 3: Change value, UINT8/10, unit: unit: °C, range: 1-10, default: 1

 When the ambient temperature does not change 1 °C for 10 minutes, switch to a higher heating stage: ffb9000a0a

Configure Temp. Control and Dehumidify

Command description:
Item Channel Type Byte Value Example
Target Humidity Range f9 09 2 Byte 1: Min. range, unit: %RH, range: 0-100

Byte 2: Max. range, unit: %RH, range: 0-100

Note: Max. range > Min, range
 Target humidity range is 20 % - 80% RH: f9091450
Temp. Control and Dehumidify f9 0a 2 Byte 1: 00=disable, 01=enable

Byte 2: Tolerance, UINT8/10, unit: °C, range: 1-5, default: 1

 Enable and the tolerance is 2°C: f90a0114

Configure Schedule Parameters

Command description:
Item Channel Type Byte Value Example
Schedule Switch ff c2 1 00=Wake, 01=Away, 02=Home, 03=Sleep, 04=Occupied, 05=Unoccupied, 06=ECO Switch to Home plan: ffc202
Schedule Content (Single Target) f9 5e 7 Byte 1: Schedule type, 00=Wake, 01=Away, 02=Home, 03=Sleep, 04=Occupied, 05=Unoccupied, 06=ECO

Byte 2: Temperature Control Mode, 00=Heat, 01=EM Heat, 02=Cool, 03= Auto
Byte 3: Fan Mode, 00=Auto, 01=On, 02=Circulate
Byte 4-5: Target Temperature, INT16/10, unit: °C, range: 5-35, default: 17
Byte 6: Target Temperature Tolerance, UINT8/10, unit: °C, range: 0.1-5, default: 2
Byte 7: Temperature Control Tolerance, UINT8/10, unit: °C, range: 0.5-10, default: 5

 Wake plan temperature control mode is Auto, fan mode is on, target temperature is 23°C, target temperature tolerance is 1°C, temperature control tolerance is 2°C: f95e000301e6000a14
Schedule Content (Dual Target) f9 59 9 Byte 1: Schedule type, 00=Wake, 01=Away, 02=Home, 03=Sleep, 04=Occupied, 05=Unoccupied, 06=ECO

Byte 2: Temperature Control Mode, 00=Heat, 01=EM Heat, 02=Cool, 03= Auto (default)
Byte 3: Fan Mode, 00=Auto, 01=On, 02=Circulate
Byte 4-5: Heating Target Temperature, INT16/10, unit: °C, range: 5-35, default: 17
Byte 6: Heating Target Temperature Tolerance, UINT8/10, unit: °C, range: 1-5, default: 2
Byte 7-8: Cooling Target Temperature, INT16/10, unit: °C, range: 5-35, default: 17
Byte 9: Cooling Temperature Tolerance, UINT8/10, unit: °C range: 1-5, default: 2

 Wake plan temperature control mode is Auto, fan mode is on, heating target temperature is 16°C, cooling target temperature is 20°C, heating and cooling target temperature tolerance are 1°C: f959000301a0000ac8000a
Schedule Time Content ff c9 6 Byte 1: Schedule type, 00=Wake, 01=Away, 02=Home, 03=Sleep, 04=Occupied, 05=Unoccupied, 06=ECO

Byte 2: ID, range: 0-15
Byte 3: 00=disable, 01=enable
Byte 4: Repeat day, per bit 0=disable, 1=enable

Bit Repeat Day
7 Sun.
... ...
1 Mon.
0 0
Byte 5-6: Time, unit: min, range: 0-1439
Note: The time of different schedules must be different.
 Add a Wake plan time on weekdays (Mon. to Fri.) 6:30AM: ffc90000013e8601
Schedule Time Status f9 8b 2 Byte 1: per bit 0=not allow control, 1=allow control

Byte 2: per bit 0=all disable, 1=all enable

Bit Schedule
7 0
6 ECO
5 Unoccupied
4 Occupied
3 Sleep
2 Home
1 Away
0 Wake
Disable all time periods of ECO: f98b4000

Relay Change Report

Enable or disable to report relay status when changing.

Command description:
Channel Type Byte Value Example
f9 3a 1 00=Disable (default), 01=Enable Enable relay change report: f93a01