Downlink Command

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

General Setting

Item Channel Type Byte Description
Reboot ff 10 1 ff
Collect Interval ff 02 2 UINT16, Unit: s
Report Interval ff 03 2 UINT16, Unit: s
Data Storage ff 68 1 00: Disable, 01: Enable
Data Retransmission ff 69 1 00: Disable, 01: Enable
Data Retransmission Interval ff 6a 3 Byte 1: 00

Byte 2-3: UINT16, Unit: s, Range: 30~1200, Default: 600
Example:
  1. Reboot the device.
    ff10ff
  2. Set collect interval as 20 minutes.
    ff02b004
    Channel Type Value
    ff 02 b004=>04b0=1200s=20 minutes
  3. Set report interval as 20 minutes.
    ff03b004
    Channel Type Value
    ff 03 b004=>04b0=1200s=20 minutes

Calibration Setting

Channel Type Byte Description
ff ea 3 Byte 1: 00=Temperature disable, 80=Temperature enable, 01=Humidity disable, 81=Humidity enable

Byte 2-3: Calibration value, temperature= INT16/10, humidity=INT16/2
Example:
Enable temperature calibration and set calibration value as -0.3°C.
ffab80fdff
Channel Type Value
ff ea 80=Temperature calibration enable

Calibration value: fd ff=> ff fd=-3/10=-0.3°C

Temperature Threshold Setting

Channel Type Byte Description
ff 06 9 Byte 1: 08=Disable, 09=Below (min. threshold), 0a=Over (max. threshold), 0b=Within, 0c=Below or over

Byte 2-3: Minimum threshold, INT16/10, Unit: °C

Byte 4-5: Maximum threshold, INT16/10, Unit: °C

Byte 6-9: 00000000
Example:
Set a temperature threshold as below 15°C or over 30°C.
ff060c96002c0100000000
Channel Type Value
ff 06 0c=Below or over

Min. threshold: 96 00=>00 96=150/10=15°C

Max. threshold: 2c 01 => 01 2c =300/10=30°C

Alarm Setting

Channel Type Byte Description
ff 06 9 Byte 1: 10=Disable, 11=Enable

Byte 2-5: 00000000

Byte 6-7: Alarm reporting interval, unit: s

Byte 8-9: Alarm reporting times
Example:
Enable alarm and set alarm reporting interval as 1 minute and alarm reporting times as 2.
ff0611000000003c000200
Channel Type Value
ff 06 11=Enable

3c00=>003c=60s=1 minute

0200=>0002=2

D2D Setting

Channel Type Byte Description
ff 79 4 Byte 1:

01=Temperature Threshold Triggered, 02=Temperature Threshold Released

03=Open, 04=Close

Byte 2: 00=Disable, 01=Only D2D, 03=D2D & LoRa Uplink

Byte 3-4: D2D Command
Example:
When temperature reaches the threshold, send D2D command 0110.
ff7901011001
Channel Type Value
ff 79 01=Temperature Threshold Triggered

01=Only D2D

D2D Command: 10 01=>0110