ModBus RTU Master Guidance

I have been looking at so many different types of examples for Modbus RTU that I think i am missing the forest for the trees.

I am trying to pull data out a slave device with 4 holding registers, containing a device ID, date/time, temperature, and another int. The registers start at 7000-7004. The slave address is 1 , Databits = 8, parity = none, response delay = 40ms. Which modbus library do you recommend to do this? And can you provide me with a code example? I do not have any code for this to show you or I would. I have simply over thought this entire process.

Thanks in advance.

Have you played with this library?