Episode 4: Forget Me Not: Medication System

Previous Posts:

Epidode 1: Forget Me Not: Application

Episode 2: Forget Me Not: The Best Laid Plans ...

Episode 3: Forget Me Not: Setup EnOcean with openHAB

I was notified of a possible delay in shipment from Newark, so I have worked on the Medication Reminder System in the mean time. It took a while to work through the examples on https://github.com/openhab/openhab/wiki/Samples-Rules to learn about setting up rules. My rules system can be summarized as follows:

1. Initialize System - Set The rocker switch states

This part is extremely important. Even though I can load the openHab interface and see the state of the switches are not ON it doesn't mean the states of the switches are OFF. There must be a tri-state option? In demo.rules I have this rule for the system startup.

rule "System Start"          //demo.rules
when
    System started
then
    Rocker1B.setState(OFF)
    Rocker1A.setState(OFF)
    medicationTakenFlag = 0          //Flag set when medication taken
end

Note: In demo.items, my rocker switches are defined as:

Switch Rocker1A {enocean="{id=00:29:E4:66, eep=F6:02:01, channel=A}"}
Switch Rocker1B {enocean="{id=00:29:E4:66, eep=F6:02:01, channel=B}"}

2. Set the medicationTakenFlag when I take the medication

If the Rocker Switch is pressed, the medicationTakenFlag gets set.

//Set the medication flag when I take my medication
rule "Medication Taken"
when
    Item Rocker1A changed from OFF to ON
then
    medicationTakenFlag = 1
end

3. Attempt to leave the home without taking medication

I have mounted a magnetic contact switch on my front door and named it EnOcean_sensor_CONTACT2. If I attempt to leave the home without having set the medicationTakenFlag (pressing the rocker switch) my Raspberry Pi will notify me with a voice command "Take Medication". This should only occur after 4 AM, because before that would just be annoying.

//Haven't taken medication and leave the apartment
rule "Remind Me While I am Leaving"
when
    Item EnOcean_sensor_CONTACT2 changed from CLOSED to OPEN
then
    var Number hour = now.getHourOfDay
    if ( (Rocker1A.state == OFF) && (hour > 4) )
    {
        //Rocker1B.setState(ON)
        say("Take Medication")
    }   
end

4. Reset the rocker switch everyday at 3:59 AM.

This should be one of the easiest settings, but I had to learn how cron works in Linux to setup the check.Have a look here for the details Quartz Scheduler | Documentation | Tutorial Lesson 06. It's still a bit confusing. The code below should turn off the rocker switch and reset the medicationTakenFlag at 3:59:00 AM everyday.

//Reset medication flag every night at 03:59
rule "Reset me"
when
    Time cron "0 59 03 * * * "        //03:59:00 AM everyday
then
    sendCommand(Rocker1A, OFF)
    medicationTakenFlag = 0;
end

5. The last rule is a little trickier. What if it's the weekend or I have the day off? I still need to be reminded if I didn't take the medication.

This last rule reminds me every 15 minutes between 8AM and 11AM if medicationTakenFlag is not set that I should take the medication. I will come up with a better way to do this one eventually because this could get really annoying.

rule "Remind Me and I Haven't Left"

when
    Time cron "* */15 * * * ?"
then
    var Number hour = now.getHourOfDay
    if ((hour > 8) && (hour < 11) && (medicationTakenFlag == 0))
        say("Take Medication")
end

That's the medication system so far. Next I might try to get Notify My Android to notify our smart devices at home as well as the voice command to take medication.

Things I learned this week:

• Initialize switch states, holy moly this can cause you a lot of grief!
• The smart phone apps respond a lot quicker than the web interface. I was watching the web interface waiting for a rocker switch state to change but it didn't change until I reloaded the interface. The app responds immediately.
• If you are working in openHab designer and you want to see the autofill options, ie you type Rocker1A. and you want to see the parameter options, hit ctrl-space.