SEND DATA message - MD30

MD30 Interface Description

Document code
M212201EN
Revision
D
Language
English (United States)
Product
MD30
Document type
User guide

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.