RTU Server?

[martijnthe]

hi Stefan,

Looking at the code, RTU server is not supported today, correct?

Do you have some thoughts on how to restructure the code to add support for it?

I started reading through the code a bit. My notes so far:

• Factor out the many cases in https://github.com/Cloud-Automation/node-modbus/blob/master/src/tcp-server-response-handler.js#L21 and move them into a transport agnostic fromRequest(request, server) method in ResponseFactory (https://github.com/Cloud-Automation/node-modbus/blob/master/src/response/response-factory.js#L16)
• Add a createPayload method to ModbusRTUResponse.
• ...

[stefanpoeter]

It shouldn't be that hard. Just create a modbus-rtu-server.js and handle everything like it is done in the modbus TCP server. You need an RTU request handler and also, like you said, a createPayload method in the RTUResponse.

If I remember correctly than there is no handshake in RTU so you don't need to remember new clients.

[martijnthe]

PR: https://github.com/Cloud-Automation/node-modbus/pull/204