Completing communications testing of the Rev A Isolated RS485 Building Block Board and planning a revised eFuse-based input protection circuit for Rev B.

Initial testing of the Rev A Isolated RS485 Building Block Board, including its isolated power supply, reverse-polarity protection, overvoltage protection and RS485 driver outputs.

Integration testing the USB-C power input board, RS485 breakout boards, Digital IO Expander board, Raspberry Pi Pico 2W boards, and an EC11 rotary encoder over a 20 m Cat 6 RS485 link.

Testing the simplified RS485 Building Block Board derived from the earlier RS485 and 48 V passthrough design, including baud rate testing over 20 m of Cat 6 cable.

Testing the input side of the Digital I/O Expander building block board, including shift register reads, input-to-output mirroring, and discovering a silkscreen labelling issue.