net

Monitors network interfaces and shows current traffic in a textbox.

mynet = lain.widgets.net()

input table

Variable	Meaning	Type	Default
timeout	Refresh timeout seconds	int	2
iface	Network device(s)	array (new api) or string (old api)	autodetected
units	Units	int	1024 (kilobytes)
notify	Display "no carrier" notifications	string	"on"
screen	Notifications screen	int	1
settings	User settings	function	empty function

Possible other values for units are 1 (byte) or multiple of 1024: 1024^2 (mb), 1024^3 (gb), and so on.

If notify = "off" is set, the widget won't display a notification when there's no carrier.

settings can use the following iface related strings.

With the old API:

• net_now.carrier ("0", "1");
• net_now.state ("up", "down");
• net_now.sent and net_now.received (numbers).

With the new API:

• net_now.sent and net_now.received (numbers) will be the sum across all specified interfaces;
• net_now.devices["interface"] contains the same attributes as the old api for each interface. More on this in the "Multiple devices" section below.
• For compatibility reasons if multiple devices are given net_now.carrier and net_now.state correspond to the last interface in the iface array and should not be relied upon (deprecated).

output

A textbox.

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Setting iface manually

If the widget spawns a "no carrier" notification and you are sure to have an active network device, then autodetection is probably not working. This may due to ip and your user privileges. In this case you can set iface manually. You can see which device is UP with the following command:

ip link show

Multiple devices

Since May 2016 iface can now be an array of the form { "eth0", "eth1", ... } containing a list of the devices to collect data on.

If more than one device is included, net_now.sent and net_now.received will contain cumulative values over all given devices. Use net_now.devices["eth0"] to access sent, received, state or carrier per device.

Two widgets for upload/download rates from the same iface

Read here.