The pine has multiple UART devices, in Linux they are /dev/ttyS0..../dev/ttySx . Please check which is the number on the connector you use, then find out what settings this UART needs to work with the software.
See here for the pinouts: http://files.pine64.org/doc/Pine%20A64%2...160119.pdf
you probably dont need to put anything in the uEnv.txt since the paramters should be configurable at runtime
you can check which UART device it is in linux if you connect the TXD/RXD pins (loopback-test) on the connector and check if you see echo characters in a terminal program like minicom
See here for the pinouts: http://files.pine64.org/doc/Pine%20A64%2...160119.pdf
you probably dont need to put anything in the uEnv.txt since the paramters should be configurable at runtime
you can check which UART device it is in linux if you connect the TXD/RXD pins (loopback-test) on the connector and check if you see echo characters in a terminal program like minicom
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