Downlink Command

This chapter describes the downlink commands for device 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
Re-collect Setting ff 1c 2 Byte 1: re-collect times

Byte 2-3: re-collect interval
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
UTC Time Zone ff 17 2 INT16/10
Device Time ff 11 4 Unix timestamp, Unit: s
Sync with with LNS ff 4a 1 ff
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
  4. Set time zone as UTC-2.
    ff17ecff
    Channel Type Value
    ff 17 ecff=>ff ec=-20/10=-2

Calibration Setting

Item Channel Type Byte Description
Pressure Calibration ff f1 4 Byte 1: 03

Byte 2: 00-disable, 01-enable

Byte 3-4: Calibration value, INT16, Unit: kPa
Examples:
  1. Enable pressure calibration and set calibration value.
    fff10301fdff
    Channel Type Value
    ff f1 03=Pressure, 01=Enable

    fdff=>fffd=-3 kPa

Threshold Setting

Item Channel Type Byte Description
Pressure Threshold Alarm ff 06 9 Byte 1: 08=Disable, 49=Below (min. threshold), 4a=Over (max. threshold), 4b=Within, 4c=Below or over

Byte 2-3: Minimum threshold, UINT16, Unit: kPa

Byte 4-5: Maximum threshold, UINT16, Unit: kPa

Byte 6-9: 00000000
Alarm Reporting Times ff f2 2 UINT16
Alarm Dismiss Report ff f5 1 00-disable, 01-enable
Example:
  1. Set the pressure threshold as below 100 kPa.
    ff06496400000000000000
    Channel Type Value
    ff 06 49=Below

    Min. threshold: 64 00=>00 64=100 kPa

D2D Setting

Item Channel Type Byte Description
D2D Feature ff 84 1 00-disable, 01-enable
D2D Key ff 35 8 The first 16 digits of D2D key, and the last 16 digits are fixed as 0.
D2D Setting ff 96 8 Byte 1:

01-Pressure Threshold Triggered

02-Pressure Threshold Released

Byte 2: 00-disable, 01-enable

Byte 3: 00-Disable LoRa Uplink, 01-Enable LoRa Uplink

Byte 4-5: D2D Command

Byte 6-8: 000000
Example:
  1. Set D2D Key as 12345678123456780000000000000000.
    ff35 1234567812345678
    Channel Type Value
    ff 35 1234567812345678
  2. When the value reaches the threshold, send D2D command 0110.
    ff960101001001000000
    Channel Type Value
    ff 96 01=Threshold Triggered

    01=Enable, 00=Disable LoRa uplink

    D2D Command: 10 01=>0110