Adding a third RS485 node to an EC11 rotary encoder test setup so that the RS485 traffic can be monitored from a PC using a USB serial adapter.

Improving the transmitter and receiver software for an EC11 rotary encoder test setup using RS485, a Digital IO Expander board, Raspberry Pi Pico 2 W boards, and an SH1106 OLED display.

Decoding an EC11 rotary encoder through a Digital IO Expander board, sending direction updates over RS485, and displaying the result on a Raspberry Pi Pico 2 W receiver with an OLED display.

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.

Receiving and beginning bench testing of the Rev A Digital IO Expander and RS485 building block boards, starting with output testing on the Digital IO Expander using a Raspberry Pi Pico 2W and MicroPython.

Sending the RS485 non-isolated board and revised Digital I/O Expander Board off for fabrication, while also preparing for future USB-C Power Delivery experiments using STM32 Nucleo development boards.

Creating a smaller non-isolated RS485 building block board based on lessons learned from the earlier RS485 and 48 V passthrough design.

Final testing of the RS485 breakout with 48 V passthrough building block board, including higher-speed RS485 communication tests over approximately 20 metres of Cat 6 cable.

Thinking through the next stage of the Protoworks building block board roadmap, including RS485 communications, isolated RS485, digital I/O expansion, low-side driver outputs, 48 V distribution, USB to serial, and future prototype board ideas.