So this is a weird one.
I am currently using an IOT2040 from siemens to communicate with a rs232 device. I can monitor traffic on my serial port via puTTy. When using 'screen /dev/ttyS3 9600' on puTTy I am able to see all communications, but am unable get the serialport node working in node red. I am currently on version 0.16.2 on node red and version 6.12.3 on node.js. My flow in node red is just serial->debug. I have tried every setting in the serial node with no luck. I have also made sure that I am not running puTTy while doing this. It does state that the serial node is connected. I have also tried to inject test strings on the port to monitor it, and am able to send things out of my iot2040, but have nothing showing in the debug window. Any suggestions? also, I am running yocto