the case is there is a device which is a Modbus slave with a DB15 serial port, I want connet my arduino to it with RS232/485 and communicate with it. Now I know Imust have a TTL to serial converter but there is no DB15 port out there, all of the products are DB9. And I don't want to use the DB9 to …

How to use arduino to communicate with DB15 serial port Modbus slave

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