Hello,
at **broken link removed** the chat 485 convert the RS232 to RS485.
It used the power of the RS232 line (or ext).
work at 9600bauds, or more or less, RC timing.
No CPU... and only TX,RX.
ask for the schematic (free), because it was describe in the french paper.
lucas
Bus-powered RS232-RS485 converter can be implemented with single MAX3162 chip (+4 capacitors). Check this link for details and schematic: **broken link removed**
Hi, RS-485 describes the phisical layer, protocol layer or communication could be anyone you can imagine...
Generaly is <ID><DATA(variable)><Checksum>. Where ID in a master system is 00 and slaves from 01 to 31.