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node-red-node-ping
==================
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A < a href = "http://nodered.org" target = "_new" > Node-RED< / a > node to ping a
remote server, for use as a keep-alive check.
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Install
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Either use the Editor - Menu - Manage Palette - Import option or run the following command in your Node-RED user directory - typically `~/.node-red`
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npm install node-red-node-ping
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**Gotchas**
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1 Ubuntu Snap containers are strict and do not like giving external commands (like ping) external access. To allow ping to work you must manually add the network-observe interface
sudo snap connect node-red:network-observe
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2 On some versions on Raspbian (Raspberry Pi) `ping` seems to be a root only command.
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The fix is to allow it as follows
sudo setcap cap_net_raw=ep /bin/ping
sudo setcap cap_net_raw=ep /bin/ping6
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Usage
-----
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Pings a machine and returns the trip time in mS as `msg.payload` .
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Returns boolean `false` if no response received, or if the host is unresolveable.
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`msg.error` will contain any error message if necessary.
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`msg.topic` contains the ip address of the target host.
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Default ping is every 20 seconds but can be configured.
