Is it possible to configure a serial direction pin when using Modbus RTU?

I am communicating between a Raspberry Pi 4 and a CLM8 Intelligent Junction Box (load cell amplifier).
I am sending using UART which gets converted to RS485 with MAX485. I think I need to set a specific pin high/low based on whether I am transmitting or receiving. Would it be possible to do this within this library?

I am able to access the pins using rppal, but I would think you would juse use OutputPin from embedded_hal in your interface.

Related issues in another library: emelianov/modbus-esp8266#62