I am just learning to use Stellarmate on my Raspberry Pi 4. The BU-353 GPS I have connected to ttyUSB0 is not working. Does anyone know where I can...I am just learning to use Stellarmate on my Raspberry Pi 4. The BU-353 GPS I have connected to ttyUSB0 is not working. Does anyone know where I can find answers to this problem?Show more