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2-Channel RS485 Expansion Module HAT Breakout Shield for RPI Raspberry Pi PICO W H WH RP2040 Development Board Accessories - AliExpress
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Amazon.com: RS485 CAN HAT for Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W/WH/Zero 2W, Long-Distance Communication via RS485/CAN Function Onboard CAN Controller MCP2515 via SPI Interface Transceiver SIT65HVD230DR : Electronics
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2-Channel RS485 Module HAT Breakout Shield for RPI Raspberry Pi PICO RP2040 Board , UART to RS485 B36A - AliExpress
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