Sios.no
Title
Category:Serial I/O system - uCtrl.net
Description
Excerpted from the website:
- The system works like a serial data bus, every module uses a serial port. But what port is irrelevant as long as the correct module number is connected to the port. Serial Server checks this and gives an error if this is not the case. All modules are identified by a unique address, it consits of three numbers, like 001, 002. It's sent in the beginning of every command string and the module will only respond to this address. Addressing is not really an issue when dealing with serial modules, because the RS-232 only allows two nodes. But in this system all the communication strings are gathered when communicating with Serial Client. The addressing makes it possible for Serial Client to read the different modules apart, and for Serial Server to send the right command to the right module when receiving from client. In the future I hope to use something like a terminal server, but at the moment I manage with a Rocketport 8-port serial interface. The reason that I chose RS-232 as a communication protocol was because of the cost. Interfacing with RS-232 is very cheap, only one device is needed: the MAX202. By using bluetooth it should be possible to make the modules wireless, but I have not tested this.
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