SEND DATA message - MD30

MD30 Interface Description
Document code
M212201EN
Revision
E
ft:locale
en-US
Product
MD30
Document type
Technical description

SEND DATA is used for requesting the default data set from the mobile sensor unit. The message can be used for the following purposes:

  • Report status and error information.

  • Initiate road condition, temperature, and humidity data reporting continuously at defined interval.

  • Stop continuous data reporting.

  • Report road condition, temperature, and humidity data using polling.

Table 1. SEND DATA message

Message ID

 0x20

Data in request

Offset

 Data

Size in bytes
7 Data interval as u16 2

Data length

 2

Data in response

Offset

 Data

Size in bytes
9 Data analyze count 2
11 Data status warning 2
13 Data status error 2
15 Air temperature 4
19 Relative humidity 4
23 Dew point temperature 4
27 Frost point temperature 4
31 Surface temperature 4
35 Surface state 1
36 EN 15518 surface state 1
37 Grip 4
41 Water layer thickness 4
45 Ice layer thickness 4
49 Snow layer thickness 4
53 Unit status info 4
57 Unit error bits 4

Data length

 52

Data interval

  • If the data interval is 0, only one set of requested data is sent back.

  • If the data interval is 25–5000 ms, the unit starts to send measurement data using the given interval. Data sending continues until data polling request with interval 0 is sent, or unit is restarted.

For a detailed description of the response message, see MD30 data message description.