Downlink Command

This device supports downlink commands for configuration and control. The downlink application port is 85 by default.

Basic Settings

Item Byte Command Parameter
Collecting Interval 1+3 60 Byte 1: 00=Second, 01=Minute

Byte 2-3: Interval time, range: 10-64800s or 1-1440 mins
Reporting Interval 1+3 62 Byte 1: 00=Second, 01=Minute

Byte 2-3: Interval time, range: 10-64800s or 1-1440 mins
Enquiry Periodic Report 1 b9 -
Relay Change Report 1+1 90 00=Disable, 1=Enable
Reboot 1 be -
Rejoin the Network 1 b6 -
Temperature Unit 1+1 63 00=°C, 01=°F
Child Lock 1+2 75 Byte 1: 00=Disable, 01=Enable
Byte 2: for every bit: 0=Disable, 1=Enable
Bit Button
0 Button 3: System On/Off
1 Button 4&5: Temperature +/-
2 Button 2: Fan Mode
3 Button 1: Temperature Control Mode
4 Reset and Reboot
7-5 000
Temporary Lock Release 1+4 8d Byte 1: 00=Disable, 01=Enable

Byte 2: Combination buttons for release, at least 2 buttons should be enabled

for every bit: 0=Disable, 1=Enable,
Bit Button
0 Button 3: System On/Off
1 Button 5: Temperature +
2 Button 4: Temperature -
3 Button 2: Fan Mode
4 Button 1: Temperature Control Mode
7-5 000
Byte 3-4: Release time, UINT16, Unit: s, Range: 1-3600
Examples:
  1. Set the reporting interval as 20 minutes.
    62011400
    Command Parameter
    62 01=Minute, 14 00=>00 14=20
  2. Reboot the device.
    be
  3. Lock the system on/off and reset/reboot features of buttons.
    750111
    Command Parameter
    75 01=Enable

    11=>0001 0001 =Enable reset/reboot and system on/off lock
  4. Allow to press the button 1 and 3 together to release the lock for 30 minutes.
    8d01110807
    Command Parameter
    8d 01=Enable

    11=>0001 0001 =Enable the lock release by button 1 and 3

    08 07 => 07 08=1800s=30 minutes

System On/Off Settings

Item Byte Command Parameter
System On/Off 1+1 67 00=Off, 01=On
Time Switch System 2+1 8c00 00=Disable, 01=Enable
Time Switch System-On Time 3+4 8c01+Time ID (0-3) Byte 1: 00=Disable, 01=Enable

Byte 2-3: Time, Unit: mins, Range: 0-1439

Byte 4: Repeat weekday, per bit 0=Disable, 1=Enable
Bit 7 6 ... 1 0
0 Sat. ... Mon. Sun.
Time Switch System-Off Time 3+4 8c02+Time ID (0-3)
Examples:
  1. Switch the fan coil system on.
    6701
    Command Parameter
    67 01=On
  2. Enable the time switch system and configure a time to switch on the system at 8:00 AM on weekdays.
    8c0001 8c010001e0013e
    Command Parameter
    8c00 01=Enable time switch system
    8c0100 01=Enable this on time

    e0 01=> 01 e0= 480 minutes =8:00

    3e => 0011 1110 = Mon. to Fri. enable

Time Settings

Item Byte Command Parameter
UTC Time Zone 1+2 c7 INT16/60
Daylight Saving Time 1+10 c6

Byte 1: 00=Disable, 01=Enable

Byte 2: DST bias, unit: min, range: 1-120

Byte 3-6: Start time, Month (1B)+Week&Day (1B) + Minute Time (2B)

Byte 7-10: End time

Week&Day:
Bit7-4 Bit3-0
Week number, range: 1-5 Weekday, range: 1-7
Sync time from LNS 1 b8 -
Examples:
  1. Set the time zone as UTC-4.
    c710ff
    Command Parameter
    c7

    10 ff => ff 10 = -240/60=-4
  2. Set DST time: start time is last Sunday 1:00 of March, end time is last Sunday 1:00 of October, and bias is 1h (60 minutes).
    c6013c03573c000a573c00
    Command Parameter
    c6

    01=Enable

    DST bias: 3c=>60 mins

    Start time: 03=>March, 57=>last (5) Sunday(7), 3c 00 =>00 3c=60 minutes =1:00

    End time: 0a=>10=October, 57=>last (5) Sunday(7), 3c 00 =>00 3c=60 minutes =1:00

Screen Settings

Item Byte Command Parameter
Screen Display 1+2 66 Byte 1: 00=Disable all, 01=Enable
Byte 2: for every bit: 0=Disable, 1=Enable
Bit Content
0 Temperature
1 Humidity
2 Target Temperature
3 Temperature Control Schedule
7-4 0000
Smart Display 1+1 65 00=Disable, 01=Enable
Examples:
  1. Disable the screen display.
    660000
    Command Parameter
    66 00=Disable all
  2. Only disable the display of temperature control schedule.
    660107
    Command Parameter
    66 01=Enable screen display

    07=>0000 0111 = Temperature control schedule disable

Data Source Settings

Item Byte Command Parameter
Internal 2 8500 -
NTC 2 8501 -
LNS 2+2 8502 Byte 1: Timeout, Unit: minute, Range: 1-60

Byte 2: Offline setting*, 00=Keep current status, 01=Valve off & Ventilation, 02=Switch to internal sensors
D2D 2+2 8503
Send Temperature 1+2 5b INT16/100, Unit: °C, Range: -20 ~ 60
Send Humidity 1+2 5c UINT16/10, Unit: %RH, Range: 0-100
*When the device does not receive valid temperature values for timeout, the device will execute this setting.
Examples:
  1. Switch to receive the data from LNS, when the device does not receive the temperature values for 60 minutes, switch to internal sensors.
    85023c02
    Command Parameter
    8502 3c=60 minutes, 02=Internal sensors
  2. Send temperature value from LNS.
    5b0208
    Command Parameter
    5b 02 08 => 08 02 =2050/100=20.50°C

Calibration Settings

Item Byte Command Parameter
Temperature Calibration 1+3 79 Byte 1: 00=Disable, 01=Enable

Byte 2-3: Calibration Value, INT16/100, Unit: °C, Range: -80 ~ 80
Humidity Calibration 1+3 7a Byte 1: 00=Disable, 01=Enable

Byte 2-3: Calibration Value, INT16/10, Unit: %RH, Range: -100 ~ 100
Example:
Enable temperature calibration and set calibration value as -0.3°C.
7901e2ff
Command Parameter
79 01=Enable, e2 ff=>ff e2=-30/100=-0.3 °C

Threshold Settings

Item Byte Command Parameter
Temperature Threshold 1+6 76 Byte 1: 00=Disable, 01=Enable

Byte 2: 00=Disable, 01=Below, 02=Above, 03=Within, 04=Beyond

Byte 3-4: Min. Threshold, INT16/100, Unit: °C, Range: -20 ~ 60

Byte 5-6: Max. Threshold, INT16/100, Unit: °C, Range: -20 ~ 60
Persistent High Threshold 1+4 77 Byte 1: 00=Disable, 01=Enable

Byte 2-3: Difference value, INT16/100, Unit: °C, Range: 1 ~ 10

Byte 4: Duration, UINT8, Unit: minute, Range: 0 ~ 60
Persistent Low Threshold 1+4 78 Byte 1: 00=Disable, 01=Enable

Byte 2-3: Difference value, INT16/100, Unit: °C, Range: 1 ~ 10

Byte 4: Duration, UINT8, Unit: minute, Range: 0 ~ 60
Examples:
  1. Enable threshold alarm and set the below threshold value as 10°C.
    760101e8030000
    Command Parameter
    76 01=Enable, 01=Below

    Min. Threshold: e8 03=>03 e8=1000/100=10°C
  2. Enable persistent high temperature threshold difference as 1°C and duration is 10 minutes.
    770164000a
    Command Parameter
    77 01=Enable

    64 00=>00 64=100/100=1°C

    0a=>10 minutes

Installation Settings

Item Byte Command Parameter
System Type 1+1 7c WT303:

00=4-pipe, 2-wire valve, 3-speed fan

01=2-pipe, 2-wire valve, 3-speed fan

02=2-pipe, 3-wire valve, 3-speed fan

WT304:

00=4-pipe, 0-10V valve, 3-speed fan

01=2-pipe, 0-10V valve, 3-speed fan

02=2-pipe, 0-10V valve, ECM fan

03=4-pipe, 2-wire valve, ECM fan

04=2-pipe, 2-wire valve, ECM fan

05=2-pipe, 3-wire valve, ECM fan
Valve Control Adjustment Range (WT304) 2+2 7d00 INT16/100, Unit: °C, Range: 1-15
Valve Opening Range (WT304) 2+2 7d01 Min. Range (1B) + Max. Range (1B), UINT8, Unit: %, Range: 0-100
Valve Control Interval

(WT304)

 2+1 7d02 UINT8, Unit: s, Range: 1-60
Valve Status(under Standby control status, WT304) 1+1 8f 00=Min. Valve Opening Range, 01=Stop (0%)
ECM Fan-Low speed

(WT304)

 2+1 7e00 INT8, Unit: %, Range: 1-100
ECM Fan-Medium speed

(WT304)

 7e01
ECM Fan-High speed

(WT304)

 7e02
DI Setting 1+1 80 00=Disable, 01=Enable
Key Card-System Control 3+1 810000 00=Insert Card-System Off, 01=Insert Card-System On
Key Card-Insert an Event 3+2 810001 Insert Card Schedule ID (1B) + Remove Card Schedule ID (1B), Range: 0-7
Magnetic Contact Switch-Sensor Type 2+1 8101 00=NC, 01=NO
Open Window Detection 1+1 82 00=Disable, 01=Enable
Open Window Detection-Temperature Collection 2+3 8300 Byte 1-2:Temperature change value, INT16/100, Unit: °C, Range: 1 ~ 10

Byte 3: Stop temperature control time, UINT8, Unit: minute, Range: 1-60
Open Window Detection-Magnetic Detection 2+1 8301 Duration, UINT8, Unit: minute, Range: 1-60
Open Window Status Release 1+1 5d 00=Release, 01=Trigger
Freeze Protection 1+2 84 Byte 1: 00=Disable, 01=Enable

Byte 2-3: Target temperature, INT16/100, Unit: °C, Range: 1-5
2-wire Valve Mode 1+1 92 00=Normal Close (Default), 01=Normal Open
Examples:
  1. Set valve adjustment range as 10°C and the valve opening range as 20-100%.
    7d00e803 7d011464
    Command Parameter
    7d00 e8 03=> 03 e8 =1000/100=10°C
    7d01 14=>20%, 64=>100%
  2. Enable the freeze protection and set the target temperature as 5°C.
    8401f401
    Command Parameter
    84 01=Enable, f4 01=>01 f4=500/100=5°C

Temperature Control Mode Settings

Item Byte Command Parameter
Mode Enable 1+1 64 07=Ventilation, Heat, Cool

03=Ventilation, Heat

05=Ventilation, Cool
Temperature Control Mode 1+1 68 00=Ventilation, 01=Heat, 02=Cool
Target Temperature Resolution 1+1 69 00=0.5, 01=1
Target Temperature Tolerance 1+2 6a INT16/100, Unit: °C, Range: 0.1~5
Heat Target Temperature 1+2 6b INT16/100, Unit: °C, Range: Depend on regulation range
Cool Target Temperature 1+2 6c
Heat Target Temperature Regulation Range 1+4 6d Min. Range (2B) + Max. Range (2B), INT16/100, Unit: °C, Range: 5~35
Note: Max. Range-Min. Range≥1
Cool Target Temperature Regulation Range 1+4 6e
Temp. Control and Dehumidify 1+3 6f Byte 1: 00=Disable, 01=Enable

Byte 2-3: Tolerance, INT16/100, Unit: °C, Range: 0.1~5
Target Humidity Range 1+4 70 Min. Range (2B) + Max. Range (2B), UINT16/10, Unit: %RH, Range: 0-100
Examples:
  1. Set the temperature control mode as Cool.
    6802
    Command Parameter
    68 02=Cool
  2. Set cool target temperature to 24°C.
    6c6009
    Command Parameter
    6c 60 09=>09 60=2400/100=24°C

Fan Mode Settings

Item Byte Command Parameter
Fan Mode 1+1 72 00=Auto, 01=Low, 02=Medium, 03=High
Fan Delay 1+3 74 Byte 1: 00=Disable, 01=Enable

Byte 2-3: Duration, UINT16, Unit: s, Range: 30-3600
Auto Fan Status (under Standby control status) 1+1 8e 00=Low speed, 01=Off
Auto Fan Mode Threshold 1+4 73
ΔT1 (2B) + ΔT2 (2B), INT16/100, Unit: °C, Range: 1~15
Note: ΔT1< ΔT2
Examples:
  1. Set fan mode as Auto.
    7200
    Command Parameter
    72 00=Auto
  2. Enable fan delay and set the duration as 10 minutes.
    74015802
    Command Parameter
    74 01=Enable, 58 02=>02 58=600s=10 minutes

Schedule Settings

Item Byte Command Parameter
Schedule Enable/Disable 3+1 7b+Schedule ID (1B, 00-07) + 00

00=Disable, 01=Enable
Schedule Name (First 6B) 3+6 7b+Schedule ID (1B, 00-07) + 01 ASCii to Hex strings (6B)
Schedule Name (Last 4B) 3+4 7b+Schedule ID (1B, 00-07) + 02 ASCii to Hex strings (4B)
Schedule Content 3+7 7b+Schedule ID (1B, 00-07) + 03 Byte 1: Fan mode, 00=Auto, 01=Low, 02=Medium, 03=High

Byte 2-3: Heating Target Temperature, Unit: °C, Range: 5 ~ 35

Byte 4-5: Cooling Target Temperature, Unit: °C, Range: 5 ~ 35

Byte 6-7: Target Temperature Tolerance, Unit: °C, Range: 0.1 ~ 5

Bit15-1 Bit0
Temperature Value 0=Disable

1=Enable
Schedule Time 4+4 7b+Schedule ID (1B, 00-07) + 04 + Time ID (1B, 00-0f) Byte 1: 00=Disable, 01=Enable

Byte 2-3: Time, UINT16, Unit: minute, Range: 0-1439

Byte 4: Repeat weekday, per bit 0=Disable, 1=Enable
Bit 7 6 ... 1 0
0 Sat. ... Mon. Sun.
Execute Schedule 1+1 5e Schedule ID, Range: 00-07
Delete/Reset Schedule 1+1 5f Schedule ID, Range: 00-07, ff=Reset
Examples:
  1. Add a schedule plan 4 and enable it.
    7b0300 01
    Command Parameter
    03=schedule4 01=Enable
  2. Set the name of schedule plan 1 as Occupied.
    7b00014f6363757069 7b000265640000
    Command Parameter
    7b0001 4f 63 63 75 70 69 => Occupi
    7b0002 65 64 00 00 => ed
  3. Set schedule plan 3 content: fan mode is Low, cool target temperature is 23°C, heat target temperature tolerance is 15°C, target temperature tolerance is 2°C.
    7b020301b90bf9119101
    Command Parameter
    7b0203

    02=Schedule 3

    		 01=Low

    Heat: b9 0b> 0b b9= 1011 1011 1001, 1=enable, 10111011 100=>1500/100=15°C

    Cool: f9 11=> 11 f9= 1 0001 1111 1001, 1=enable, 100011111100=>2300/100=23°C

    Tolerance: 91 01=>01 91 = 1 1001 0001, 1=enable, 11001000=>200/100=2°C
  4. Add times for schedule plan 3: Enable 6:30 AM on weekdays (Mon. To Fri.), 8:00 AM on weekend.
    7b0204000186013e 7b02040101e00141
    Command Parameter
    7b020400 01=Enable

    86 01=>01 86=390 minutes=6:30

    3e =>0011 1110=weekdays enable
    7b020401 01=Enable

    e0 01=>01 e0=480 minutes=8:00

    41 =>0100 0001=weekend enable
  5. Execute schedule plan 3 immediately.
    5e02
    Command Parameter
    5e 02=schedule3

D2D Settings

Item Byte Command Parameter
D2D Data Receiving Feature 1+1 86 00=Disable, 01=Enable
Pairing Device 3+1 87+Device ID (1B, 00-04)+00 00=Disable, 01=Enable
Pairing Device EUI 3+8 87+Device ID (1B, 00-04)+01 Device EUI (8B)
Pairing Device Name (First 8B) 3+8 87+Device ID (1B, 00-04)+02 ASCii to Hex strings (8B)
Pairing Device Name (Last 8B) 3+8 87+Device ID (1B, 00-04)+03 ASCii to Hex strings (8B)
D2D Controller Feature 1+1 88 00=Disable, 01=Enable
D2D Controller-Schedule 2+7 89 + Schedule ID (1B, 00-07) Byte 1: 00=Disable, 01=Enable

Byte 2-3: Control command

Byte 4: 00=Disable LoRa Uplink, 01=Enable LoRa Uplink

Byte 5-7: 000000
D2D Controller-System Off 2+7 8910
D2D Controller-System On 2+7 8911
D2D Agent Feature 1+1 8a 00=Disable, 01=Enable
D2D Agent Rule 2+4 8b+ Rule ID (1B, 0-7) Byte 1: 00=Disable, 01=Enable

Byte 2-3: Control command

Byte 4: Action object

00~07=Schedule ID

10=System Off, 11=System On
Examples:
  1. Add and enable a pairing device EUI and the name is device1.

    87000001 87000124e124136c270731 8700026465766963653100
    Command Parameter
    870000 01=Enable
    870001 24e124136c270731
    870002 64 65 76 69 63 65 31 00 => device1
  2. Enable D2D Controller: When the system switches to off, send command ff01 to D2D agent devices.
    89100101ff00000000
    Command Parameter
    8910 01=Enable

    01 ff=> ff 01=Command

    00=Disable LoRa Uplink
  3. Enable D2D Agent Rule 1: When receiving a command 0001, switch the system on.
    8b0101010011
    Command Parameter
    8b01 01=Enable

    01 00=>00 01=Command

    11=System on