UT-308, Custom Protocol Converters, Communication Protocol for Serial Dongle - Product

Other Specification : UT-308, Custom Protocol Converters, Communication Protocol For Serial Dongle Description: 1. Command Message (control ID Code Description Of Data Or Action Type) And Response Message (to Return ER Table). The First Two Characters Represent Its Function And Also It Is The Command To Be Sent. The Data After Some Of The Two Characters Are In Decimal System. For Details, Please Refer To The Following: Hostsend: - - - - No. | 1 | 2 | 3 | 4 | 5 | Bytes | 1 | 2 | LENGTH | 1 | 1 | Format | SOH | Receiver | DATA | BCC | EOT | - - - - Clientresponse: - - - - No. | 1 | 2 | 3 | 4 | 5 | Bytes | 1 | 2 | LENGTH | 1 | 1 | Format | SOH | Receiver | DATA | BCC | EOT | - - - - : Header Code Of The Title When Data Sending Begins. (ASCII HEX 01) : End Code When Data Sending Ends. (ASCII HEX 04) : The Two ASCII Characters (01-FE) Represent The Address Information Of The Receiver. : This Is For Validation To Calculate And Validate (chksum) From To , And BCC Is The Residue After The Total Of The Characters Mod By 128. If The Resulted Residue Is Less Or Equals To 32, Then Another 32 Shall Be Added For Supplement. VB Application Sample UPD$=01ZWABCD OrgBuf$ = Chr(1) + UPD$ + CheckSum(UPD$) + Chr(4) Merge Command MSComm1.Output = OrgBuf$ Send Command Public Function CheckSum(Buf As String) As String Dim I%, OrgBuf$ Dim CKValue% CKValue = &H0 OrgBuf = Buf CKValue = 0 For I = 1 To Len(Buf) CKValue = CKValue + Asc(Mid(Buf, I, 1)) And &H7F Next I If CKValue <= 32 Then CKValue = CKValue + 32 End If CheckSum = Chr(CKValue) End Function : For Baud Rate Setting, 1 ASCII Character 0-4. : Device Type, 2 ASCII Character

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