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Sending SMS Alerts for UPS in openHAB

 

Background


So after setting up sending SMS messages from my Raspberry Pi (see article here) and integrating this with my openHAB server installation (see article here) the next step is to setup an openHAB rule to send me an sms text when the UPS switches to battery power, and then again when UPS mains power is restored.

Adding rules to openHAB

A rule is required to pass a message text via the smstext and smssend items. The sms.rules rules then trigger an SMS text to be sent to my mobile phone.  
   
$  nano /etc/openhab/rules/ups.rules
Add the following lines:

rule "Power outage"
// set SMS text to be sent by ups.rule when the power switches to battery on mains loss

when
    Item ups_status changed from "OL" to "OB"
then
    logInfo("UPS:", "UPS has switched to battery power")
	smstext.sendCommand("UPS: mains power outage")
end


rule "Power returned"
// set SMS text to be sent by ups.rule when the power switches to mains on mains restoration

when
    Item ups_status changed from "OB" to "OL"
then
	logInfo("UPS:", "UPS has switched to mains power")
	smstext.sendCommand("UPS: mains power restored")
end
Where OL is a status of the UPS as online and OB is on battery. I also added some information for log entries to the openHAB log. 

Testing the openHAB rule

To test I simply remove the power connection to the UPS and voila I receive an SMS to my phone. Plugging it back in I receive another sms text. 


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