Arduino-ASX00004-MKR-485-RS485-Protocol-Shield-for-Industrial-Connections-Arduino-ASX00004-The-Arduino-MKR-485-Shield-is-perfect-if-you-need-to-add-serial-communications-to-your-project-The-shield-uses-the-RS-485-protocol-to-ensure-you-get-all-the-industrial-connectivity-you-need-br-br-This-shield-is-the-best-solution-for-enabling-MKR-boards-to-connect-to-almost-any-legacy-industrial-system-such-as-industrial-PLCs-controllers-drives-and-HMIs-Old-industrial-systems-e-g-machiner