i come accross a half duplex ASCII protocol that uses following message format again and again: [STX][dev.addr.][sequence number][message/commands...][ETX][checksum]
not only in industrial rs485 devices, but also in this consumer device:
so if this protocol is so widely adopted, why can't i find informations about it.. what is it called? how does one implement such a protocol...
i wanna use this kind of protocol with my own uC projects...
i definitely like it's conceptual simplicity, compared to other protocols..
i like this Sequence Number/Repeat Flag thing...
The sequence number is a single byte that conveys both a sequence number (legal values: 0 to 7) and a bit-flag indicating that the command block is being repeated due to a communications breakdown. The sequence number is used as an identity stamp for each command block
this question is the only valuable information i could find... How do you design a serial command protocol for an embedded system?
is there a book about the design and implemention of ASCII protocols for uC use?
--------------------------------------- Posted through