I need a way to be informed when a transmission to the client has completed on the wire so that I can disable the transmitter in my rs232/rs485 transceiver chip. Is there an obvious way to do this that I have missed? I am using node-red-contrib-serial-modbus, that uses modbus-serial, which in turn, uses serialport. It looks I can get a callback from serialport. However as far as I can see this is not used by the parent nodes.
Before I start hacking code. Has anyone any experience of this they can share. Or even better some code.