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.
|
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.