I have succesfully installed nodered on my raspberry-pi.But the problem is each time i write a flow,i have to save the flow into flows_raspberrypi.json and restart nodered server. How to make it automatically save the nodes.
2 possible things.
1) If you created there flow file by hand then you probably need to create a file called flows_raspberrypi_creds.json containing:
{}
2) assuming no errors in either the flow file or the creds file then node-red will load a file based on the machines hostname to start with, you can override this by passing a name on the command line:
$node red bob
will load bob.json & bob_creds.json
If neither of those work run node red -v
to show more detailed error messages.