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Amazon.com: 2-Channel Isolated RS232 Expansion HAT for Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W, SC16IS752+SP3232 Dual Chip Convert SPI to RS232 Data Rate up to 921600bps Embed Multi Protection Circuits : Electronics
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Electrical connector RS-232 Serial port Raspberry Pi General-purpose input/output, USB, electronics, adapter png | PNGEgg
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