I have these adapters:
There is a smaller and cheaper version without the RS-232 port you don't need:
The nice thing about these interfaces is they are isolated, which protects equipment at both ends against unfortunate circumstances like lightning, and it is also much more robust against noise. There is another cheaper one on the same page, but it is not isolated.
They are also available from aliexpress, amazon, etc.
FT232RL/CH343G USB TO RS232/485/TTL Interface Converter, Industrial Isolation
FT232RL/CH343G USB TO RS232/485/TTL Interface Converter, Industrial Isolation
www.waveshare.com
There is a smaller and cheaper version without the RS-232 port you don't need:
USB to RS485/422 Industrial Grade Isolated Converter, Onboard Original FT232RL and SP485EEN, Multiple Protection
USB to RS485/422 Industrial Grade Isolated Converter, Onboard Original FT232RL and SP485EEN, Multiple Protection
www.waveshare.com
The nice thing about these interfaces is they are isolated, which protects equipment at both ends against unfortunate circumstances like lightning, and it is also much more robust against noise. There is another cheaper one on the same page, but it is not isolated.
They are also available from aliexpress, amazon, etc.