If PacketSize + Z or ChrB(26) which is the old style end of file marker. Instr returns the position of the first byte of the Terminator, so we subtract 1 to get the actual packet size PacketSize = InStrB(0, me.Lookahead, Terminator) - 1 // Check the buffer for at least one full packet. Sub DataAvailable()ĭim Terminator As String = ChrB(26) // This is the data terminator, in this case it is an EndOfFile, but could be multiple byte like CRLF (#0D0A) Xojo being event driven requires developers to manage the process and this is my implementation of the data available event. These can be end of file ChrB(26) or various end of line sequences CRLF, CR, LF, LFCR depending on the OS & remote device. Termination means there will be some kind of end of transmission byte(s). Today we’re going to look at the terminated version. When receiving data from remote sources there are two options available, one option is where the source will send a packet size followed by the data, the other is where the packet is terminated. He operates an IT Company Axis Direct Ltd primarily develops applications using Xojo that integrate with Xero Wayneâs hobby is robotics where he uses Xojo to build applications for his Pi2 often implementing IoT for remote control. Wayne Golding has been a Xojo developer since 2005.
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