friends tell me please, I work with rs485 via usb adapter ch340. node-red use serial in and serial out on dev / ttyUsb0 port. but when I send a request I don't get a response, not in win environment not in linux. the protocol is not modbus. through the provided commands are sent and received, from node-red not. Can you tell me if there is a tool for working with 483?
You might want to correct your title and last comment... rs483 is not a communications protocol and confuses the search
On that note, have you searched this forum and the palette for rs485?
This is old, but might work?
Have you tried sending your commands in Windows via a terminal tool such as Realterm ? you need to confirm that you have the correct drivers for your adapter and that your adapter is working, then try sending commands from a terminal app to check you have the correct command syntax . . . . before you start blaming Node Red.
I'm 90% way through a medium sized project which relies heavily on RS485 comms in Node Red using the standard TX and RX comms nodes.
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