Enable UART4 - bbb - 4.4.113-ti-r149

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1

How is UART4 enabled on beaglebone black, uname_r=4.4.113-ti-r149

Would I use

cape_enable=bone_capemgr.enable_partno=BB-UART4

in uEnv.txt?

2

I am running into the following error using Adafruit_BBIO.UART

`

UART.setup(“UART4”)
RuntimeError: Unable to export UART channel.

`