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node-red-node-ping
A Node-RED node to ping a remote server, for use as a keep-alive check.
Install
Run the following command in the root directory of your Node-RED install
npm install node-red-node-ping
Gotcha
On some versions on Raspbian (Raspberry Pi) ping
seems to be a root only command.
The fix is to allow it as follows
sudo setcap cap_net_raw=ep /bin/ping
sudo setcap cap_net_raw=ep /bin/ping6
Usage
Pings a machine and returns the trip time in mS as msg.payload.
Returns boolean false
if no response received, or if the host is unresolveable.
msg.wrror will contain any error message if necessary.
msg.topic contains the ip address of the target host.
Default ping is every 20 seconds but can be configured.