https://stackoverflow.com/questions/5576237/android-bluetooth-serial-rfcomm-spp-how-to-change-the-baud-rate?rq=1(2014 답변)
Therefore it is impossible to set the baud rate as desired on Android. It will use the default baud rate that your bluetooth adapter uses (probably 9600).
https://stackoverflow.com/questions/16300575/how-to-set-android-bluetooth-baud-rate-to-19200-programatically(2016 답변)
Android does not set the baudrate, the default rate is set by the Actuator.
일단은 보내주신 nRF UART 소스에도 baud 키워드가 없음
https://forum.arduino.cc/index.php?topic=71296.0
일단 질문자의 2개 링크는 다 이제 없는 주소임..
근데 아두이노는
