[RESOLVED] tty on GPIO with RPi2

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I assume you are using the Raspberry Pi UARTS on GPIO 14 and GPIO 15?

If you are using a RPI3, you need to first disable the Bluetooth connection, as it uses the RPI UART.

You might be better off using a USB-DB9 converter.

There is a good description of RPI UARTS here: https://www.raspberrypi.org/documentatio...on/uart.md