Reflecting on the first RS485 breakout with 48 V passthrough board and why the next revision may split RS485 communication and 48 V distribution into separate building block boards.

Further testing of the RS485 breakout with 48 V passthrough board, including validation of the 48 V polarity protection, identifying a backfeed issue, and testing basic RS485 serial communication over Cat6 cable.

Testing the RS485 breakout with 48 V passthrough building block board using a simple transmitter and receiver setup, including basic signal checks and cable testing over approximately 20 metres of Cat 6.

The first manufactured RS485 breakout with 48 V passthrough boards have arrived, followed by initial inspection, a silkscreen mistake, and the first basic bring-up checks.

Sending the first RS485 breakout with 48 V passthrough building block board for manufacture, while refining the design around screw terminals, JLCPCB parts selection, and practical field use.

Refining an RS485 breakout board with 48V passthrough by removing the RJ45 connector, switching to screw terminals, and separating the 48V and logic ground regions.

Designing an RS485 breakout board with screw terminals, optional RJ45 cabling, selectable termination and biasing, and 48V passthrough protection.