Hatteland Display HT B22 (Fanless) - Manual (Page 58)

58
API / VCOM Commands
Appendix
IND100077-132
Available Messages to Send:
Please review the last page of this section for a code example.
“SWI” - Retrieve Internal Software Version Query:
This query is sent to the unit in order to get the version. Any future revisions, such as CMD additions or changes to
the software will increment the software version. The unit will reply to this command with an ACK attention code. The
DATA field will be a ASCII text string indicating the software version, e.g: “SW101010-0180”.
Command Software Version query:
0x07 0xFF 0x53 0x57 0x49 0x00 0x06
Acknowledge / Response (“SW101010-0180”):
0x06 0xFF 0x53 0x57 0x49 0x0D 0xFA 0x53 0x57 0x31 0x30 0x31 0x30 0x31 0x30 0x2D 0x30 0x31 0x38 0x30 0x3C
“QDU” - QM57 Chipset Half-Duplex Mode:
This query is sent to the local unit in order to force Half-Duplex Mode for the physical external RS-485/RS-422
DB9Male connector. Review “Pin Assignment” chapter in this manual for connector details.
Set Half Duplex Mode:
0x07 0xFF 0x51 0x44 0x55 0x01 0x0E 0x00 0xFF
Acknowledge / Response:
0x06 0xFF 0x51 0x44 0x55 0x01 0x0F 0x00 0xFF
“QDU” - QM57 Chipset Full-Duplex Mode:
This query is sent to the local unit in order to force Full-Duplex Mode for the physical external RS-485/RS-422
DB9Male connector. Review “Pin Assignment” chapter in this manual for connector details.
Set Full Duplex Mode:
0x07 0xFF 0x51 0x44 0x55 0x01 0x0E 0xFF 0x00
Acknowledge / Response:
0x06 0xFF 0x51 0x44 0x55 0x01 0x0F 0xFF 0x00