The following table describes the query messages, i.e. request-response pairs, used for data collection using the Ethernet connection.
| Those response keys that are always sent are preceded by an asterisk (*). |
| Specification | Description | Request ID | Request data | Response key |
|---|---|---|---|---|
| NULL message | Included in query messages for debugging purposes as it can be used to check whether the server is listening. The message gives a high-level 'ping' functionality. | 0x00000000 | (none) |
|
| Protocol version | Responded to with a value representing the server (refractometer) protocol version. | 0x00000001 | (none) | *Version: integer, the server protocol version (currently 3) |
| Refractometer information | Gives the basic information of the refractometer. | 0x00000003 | 0x00000000: always zero |
|
| Measurement results |
Gives the measured and calculated measurement values from the refractometer. |
0x00000004 | 0x00000000: always zero |
|