serialport node hangs after some time (no input from/no output to serial device)

Which node are you reporting an issue on?

node-red-node-serialport

What are the steps to reproduce?

• Arduino Uno with sketch, that writes every 30 seconds sensor data via serial.write
• Arduino is connected via USB cable, Port is ACM0
• Arduino LED 13 blinks every second, so its possible to see if the controller is crashed or not

What happens?

After some time (30 minutes or 12 hours or 2 days, interval is not the same) in node-red is no data available.
The arduino LED 13 blinks.
To solve the problem its possible

• to disconnect the arduino for a short time (disconnect the usb cable, connect the cable)
• redeploy the flow
  After that, everything is fine until the next crash.

In case of the "crash" there is via dmesg no entrie available, that the usb port is disconnected

What do you expect to happen?

It would be nice, if its possible to reset the serial connection via a node.
So its possible to create a flow to check the last time a message arrived. If > 60 seconds reset the connection.

Please tell us about your environment:

• Node-RED version:
  0.18.5

• node.js version:
  6.14.3

• npm version:
  3.10.10

• Platform/OS:
  Linux Debian Jessie

• Browser:
  Chrome

Start with the node-red-node-serialport entry point and reproduce the hang using an Arduino Uno that sends sensor data every 30 seconds over ACM0. Compare the behavior before and after disconnecting/reconnecting the USB cable or redeploying the flow. Done means the serial connection can be reset through a node after messages stop arriving.