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picowifimodem
A Pico W based RS232 <-> WiFi modem with Hayes AT style commands and LED indicators
pcbbomRP2040resistorcapacitordiode
modbusrtu-test-shield
A shield for Arduino boards that provides an RS-485 transceiver, RS-232 transceiver, and a selection of buttons, lights, and knobs.
schematicpcbbomswitchpotentiometerresistorcapacitor