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UART TTL to RS485 Two-way Converter Module [TTL-RS485-Module] - US $2.80 : HAOYU Electronics : Make Engineers Job Easier
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TTL to RS485 Converter Module AOZ1282CI SP485EEN Compatible M5StickC ® for Arduino - products that work with official Arduino boards
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SCM TTL to RS-485 Interface Module - ProtoSupplies
Industrial USB To RS485/TTL to RS485 Converter Upgrade Protection Converter Compatibility Standard RS 485 Connector Board Module|Integrated Circuits| - AliExpress
