RS-485 Half Duplex Port. Up to 250 kbps transfer rate. Use the Raspberry Pi to control external RS-485 devices. Stackable with other Raspberry Pi accessory boards. The RS485 Raspberry Pi HAT is connected to the UART port on the Raspberry Pi using a SN65HVD72 interface. The SN65HVD72 IC converts the 3.3V UART signals to RS-485 voltages allowing communication with RS-485 compatible devices over a DB9 serial cable or twisted pair cable.
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The Raspberry Pi Zero W extends the Pi Zero family. The Pi Zero W has all the functionality of the original Pi Zero but with added connectivity.,
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