Everything's working like a charm now :grinning: , so thread is marked as [solved] now. One more big "Thank you" to everybody helping to get this finally done :confetti_ball: :clap: ! In addition a picture of my Node 2 - the one I did the most rework over time until now also showing the violet MCP2551 module mentionned above. [image: 1530172152975-mcp2551_node_a-resized.png]