...

Both U-Boot and Linux are configured to use LPUART1 for the serial console on the NXP i.MX RT1050 EVK.

1. Connectingh Serial Console Using a microUSB Cable

On the NXP i.MX RT1050 EVK, LPUART1 interface is available at UART level on the J28 connector on the baseboard if a microUSB cable connected to the development host.

...

To exit kermit, type Ctrl-\ and then q.

2. Connecting Serial Console Using a USB UART Dongle

On the NXP i.MX RT1050 EVK, LPUART1 interface is available at UART level on J30 and J31 connectors. Remove jumpers from J30 and J31 connectors to access the pins. In order to connect the serial console to a PC, you must convert the UART interface either to an RS-232 interface or to a USB interface. This requires connecting an external device ("dongle") to the i.MXRT1050 EVK. There are various such devices available on the market. One specific device we have been using (among others) is the WaveShare FT232 USB UART board:

...