Hello everyone, I am trying to interface a SIM800 (GSM) module on the udoo neo using the UART6 port. I patched the kernel, recompiled it and then flashed the newly patched kernel on the SD card. I also enabled the UART6 on GPIO in the device tree editor. My problem is that sometimes the UART6 port opens normally and sometimes it does not. UART6 does not seem to work well for me yet. When the port does not work, I try to open it using minicom and it gives "device or resource busy". Any help on this matter will be highly appreciated. Thanks in advance.
