FX30 - UART on IoT expansion card slot

IoT Gateways FX30
2

I have little progress, I find that the default on IoT expansion slot is connected with UART 2 then:

  1. I chenged UART2 mode to: AT!MAPUART=17,2
  2. In file Component.cdef changed to: [rw] /dev/ttyHSL1 /dev/ttyHSL1
  3. In function: tty_fd = open("/dev/ttyHSL1", O_RDWR | O_NOCTTY);

Now I can send chars to the UART 2 and observe on Tx my sended chars, but the speed is incorrect is about 4 000 000 bps no 19200.
Unfotunetly I find next problem with GPIO service when I change UART 2 mode, my application report the error:

Jan 6 00:02:22 | gpioService[538]/sysfsGpio T=main | gpioSysfsUtils.c ExportGpio() 106 | Failed to export GPIO 47. Error Operation not permitted
Jan 6 00:02:22 | gpioService[538]/sysfsGpio T=main | gpioSysfsUtils.c gpioSysfs_SessionOpenHandlerFunc() 1061 | Unable to export GPIO gpio47 for use - stopping session

I finds some information on forum about muxCtrlService but I dont know how to use this on FX30 gateway
Please any help.