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Isolated 4 Port USB to TTL UART FTDI PIN Header
| Name | Description | Direction | Voltage level |
|---|---|---|---|
| + | Positive power supply | Input | 1.8V – 5V |
| – | Ground | Input | 0V |
| RX | UART RX | input | same of + |
| TX | UART TX | output | same of + |