This tool reads a resin raspberry pi image from a file and prints the network configuration to stdout, or reads a network configuration from stdin and writes it in the image.

1. Download an image from your dashboard
2. Run ./resin-net-config get resin-foobar.img > foobar.config
3. Modify foobar.config according to your needs as per the connman config format - More information -> http://docs.resin.io/#/pages/configuration/custom-network.md
4. After you're done run cat foobar.config | ./resin-net-config set resin-foobar.img

To change the ethernet configuration use the get_ethernet and set_ethernet methods instead of the regular get and set