Downlink Command

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

General Settings

Item Channel Type Byte Description
Reboot ff 10 1 ff
Report Interval ff 03 2 UINT16, Unit: s
Collect Interval ff 02 2 UINT16, Unit: s
UTC Time Zone ff 17 2 INT16/10
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 report interval as 20 minutes.
    ff03b004
    Channel Type Value
    ff 03 b004=>04b0=1200s=20 minutes
  3. Set time zone as UTC-2.
    ff17ecff
    Channel Type Value
    ff 17 ecff=>ff ec=-20/10=-2

Temperature Calibration Settings

Channel Type Byte Description
ff ab 3

Byte 1: 00: disable, 01: enable

Byte 2-3: Calibration value, INT16/10, unit: °C
Example:

Enable temperature calibration and set calibration value.

ffab01fdff
Channel Type Value
ff ab

01=Enable

fdff=>fffd=-3/10=-0.3 °C

Temperature Threshold Settings

Channel Type Byte Description
ff 06 9

CTRL(1B)+Min(2B)+Max(2B)+00000000(4B)

CTRL:

Bit2~Bit0:

000=disable

001=below

010=above

011=within

100=below or above

Bit5~Bit3: ID

001=Temperature Threshold

010=Temperature Mutation Threshold

Bit6:

0=disable the Alarm Threshold

1=enable the Alarm Threshold

Bit7: Reserved

Max/Min:

INT16/10, Unit: °C
Example:
  1. Enable temperature threshold and configure the alarm when the temperature exceeds 30°C.

    ff06 ca 0000 2c01 00000000
    Channel Type Value
    ff 06

    CTRL: ca =11 001 010

    010 = above

    001 = Temperature Threshold

    1 = enable the Threshold Alarm

    Max: 2c 01 => 01 2c => 300/10 = 30°C
  2. Disable mutation threshold and configure the alarm when the mutation value exceeds 5°C.

    ff06 10 0000 3200 00000000
    Channel Type Value
    ff 06

    CTRL: 10 = 00 010 000

    010 = Temperature Mutation Threshold

    0 = disable the Threshold Alarm

    Max: 32 00 => 00 32 => 50/10 = 5°C