I’m new to MM and just been putting together my board over the last week.
I’ve used your module and think it’s great.
One thing I did find is that your default way of grabbing diskspace had the device hard coded.
I made this change to node_helper.js:
async.apply(exec, "df -h /|grep dev|awk '{print $4}'"),
That looked for the root partition and was able to then return the correct value for me.