I am currently working on a software that uses a barcode scanner reading from an Ubuntu serial port. The service is hosted inside a k3s pod. The scanner is set to a baud rate of 115200, and the port is set up through minicom for 115200.

When I try change the baud of the port using stty -F /dev/ttyS6 115200 while the service is not running it works. But when I start the service it resets the baud rate to 9600:

speed 9600 baud; line = 0; intr = <undef>; quit = <undef>; erase = <undef>; kill = <undef>; eof = <undef>; start = <undef>; stop = <undef>; susp = <undef>; rprnt = <undef>; werase = <undef>; lnext = <undef>; discard = <undef>; min = 1; time = 0; -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke

Here is my k3s deployment:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: serial-scanner # name of the deployment
spec:
  selector:
    matchLabels:
      app: serial-scanner # label to match
  template:
    metadata:
      labels:
        app: serial-scanner # label to apply
    spec:
      volumes:
      - name: serialports-utils
        persistentVolumeClaim:
          claimName: serialports-pvc
      - name: ttys0
        hostPath:
          path: /dev/ttyS0
      - name: ttys1
        hostPath:
          path: /dev/ttyS1
      - name: ttys2
        hostPath:
          path: /dev/ttyS2
      - name: ttys4
        hostPath:
          path: /dev/ttyS4
      - name: ttys5
        hostPath:
          path: /dev/ttyS5
      - name: ttys6
        hostPath:
          path: /dev/ttyS6
      hostname: serialscanner
      hostNetwork: true # this allows the pod to use the Hub's network stack
      containers:
      - name: serial-scanner # this will be the interal DNS label of the pod
        securityContext:
          privileged: true
        image: serial_scanner # name of image to use. Should later be version controlled
        imagePullPolicy: IfNotPresent # this will pull the image from the local registry first and then from the internet
        ports:
        - name: grpc
          containerPort: 3000
        volumeMounts:
        - mountPath: /dev/ttyS0
          name: ttys0
          readOnly: true
        - mountPath: /dev/ttyS1
          name: ttys1
          readOnly: true
        - mountPath: /dev/ttyS2
          name: ttys2
          readOnly: true
        - mountPath: /dev/ttyS4
          name: ttys4
          readOnly: true
        - mountPath: /dev/ttyS5
          name: ttys5
          readOnly: true
        - mountPath: /dev/ttyS6
          name: ttys6
          readOnly: true
        - mountPath: /serialscanner/utils
          name: serialports-utils
---