Id use a mega as sensor slave and a Uno as a master.
The Uno, in the other hand, only needs to read data from rs485, thats why I though mega as a master would be overkill.
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16