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CH340 module USB to TTL CH340G upgrade download a small wire brush plate STC microcontroller board USB to serial instead PL2303

USB Relay Module CH340 USB Intelligent Control Switch 10A 250VAC 30VDC Over-Currentelay LCUS-1/LCUS-2 /LCUS-4/LCUS-8 Smart Home

1/5/10Pcs HL-340 HL340 New USB to RS232 COM Port Serial PDA FT232 9 pin DB9 Adapter support WIN11 Compatible CH340

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USB 2.0 to TTL RS485 Serial Converter Adapter FTDI Module FT232RL Double Function Protection TTL Turn RS - 485 MAX485 RS485

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CH340N module CH340 Downloader USB-to-TTL download cable Single-chip microcomputer Serial port download