Arduino uno -----> Modbus ----> HMI

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hi

i trying make little project.
i have sensor connect arduino uno , delivers asynchronous serial data in ttl rs-232 format (through pin 2 , 3).
see https://www.atlas-scientific.com/_files/_datasheets/_circuit/flo-30_1.4.pdf

i want transfer data hmi through modbus 485 rtu.
i have been looking @ codes , libraries , getting little bit confused  :~

i tested examples on arduino , connected rs-485/usb computer using program "baseblock modbus rtu communication tester" no luck.

can me this....
like if start simple , wanted send number 25 arduino through modbus , see in "test" program, do. ?

regards.
steini

how did connect rs-485/usb , computer? provide wiring information/photograph.


Arduino Forum > Using Arduino > Networking, Protocols, and Devices (Moderator: fabioc84) > Arduino uno -----> Modbus ----> HMI


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