Clean-sheet 28 V industrial controller with ESP32-WROOM-32UE, RMII Ethernet, USB-UART programming, external switch interfaces, Tic 36v4 stepper control, protected I/O, and logic ride-through.

UK Smart Wall Switch Back Board: 802.3af PoE-powered 65x65mm relay and energy-monitoring back board with RJ45, isolated 5V/3.3V rails, W5500 Ethernet, BL0942 metering, touch ICs, and 12-pin pogo interface.

Industrial multi-protocol gateway rebuilt in Flux with ESP32-WROOM-32E, Ethernet, CAN, RS485, USB-C, microSD, I2C, analog/digital I/O, status LED, and user switch. All resistors and capacitors target 0603 SMD packaging; connectors remain through-hole only where mechanical robustness requires it.