[RC232] Each slave boat will have a bit rate of 1Kbps to the master node, the signal range must be till 2km (line of sight). We are considering using RC17xxHP-RC232 modules to communicate with master boat and slaves. It’s possible with this device to create a multipoint network (one master, many slaves)?
It supports one master many slaves. Please see RC232 User Manual for details about the embedded protocol.