I am a happy user of Control a water heater and ground source heat pump based on cheap hours of spot priced electricity - #12 by masipila by @masipila and the Home Connect OH binding. I have a Siemens dishwasher that I currently configure manually to start at night at the lowest electricity price using an OpenHAB rule. I would want this rule to run automatically when the electricity price is lowest. The script needs to do three things: Turn the dishwasher on, select the program and start the dishwasher.
My current rule looks like this:
This is where I am at right now. Will report if this works.
dh = require('xxxx/date-helper.js');
wh = require('xxxx/waterheater.js');
influx = require('xxxx/influx.js');
start = dh.getCurrentHour();
control = influx.getCurrentControl('drier_control', start);
tiskikoneenVirta = items.getItem("Siemens_Astianpesukone_012020388740013427_Virta");
tiskiKoneenOhjelma = items.getItem("Siemens_Astianpesukone_012020388740013427_Selected_Program");
tiskikoneenKaynnistys = items.getItem("Siemens_Astianpesukone_012020388740013427_Program_Actions");
// Check if the dishwasher is off and should be turned on.
if (tiskikoneenVirta.state == 'OFF' && control == 1) {
tiskikoneenVirta.sendCommand('ON');
// Set dishwashing program
tiskikoneenOhjelma.sendCommand('Dishcare.Dishwasher.Program.Auto2');
// Start dishwasher
tiskikoneenKaynnistys.sendCommand('start');
console.log('Dishwasher: Started.');
}
else {
console.log('Dishwasher: No state change needed.');
}
You don’t need to included the waterheater js here.
You need another rule which will save the control point for your dishwasher. You can call that for example dishwasher_control.
And then you need to change the drier_control to dishwasher_control from this rule.
So to summarize: you’ll need two rules. One that determines the 1/0 control points. And this one which will check the control points if current hour is the one when you want to start the dishwasher.
dh = require('xxx/date-helper.js');
wh = require('xxx/waterheater.js');
influx = require('xxx/influx.js');
start = dh.getMidnight('start');
stop = dh.getMidnight('stop');
// Determine cheap hours and write control values to the database
hours = 4;
points = wh.determineHours(start, stop, hours);
influx.writePoints('dishwasher_control', points);
Rule to check if dishwasher needs to start:
dh = require('xxx/date-helper.js');
influx = require('xxx/influx.js');
start = dh.getCurrentHour();
control = influx.getCurrentControl('dishwasher_control', start);
tiskikoneenOvi = items.getItem("Siemens_Astianpesukone_012020388740013427_Door_State");
tiskikoneenVirta = items.getItem("Siemens_Astianpesukone_012020388740013427_Virta");
tiskiKoneenOhjelma = items.getItem("Siemens_Astianpesukone_012020388740013427_Selected_Program");
tiskikoneenKaynnistys = items.getItem("Siemens_Astianpesukone_012020388740013427_Program_Actions");
// Check if the dishwasher is off and should be turned on.
if (tiskikoneenOvi.state == 'CLOSED' && tiskikoneenVirta.state == 'OFF' && control == 1) {
tiskikoneenVirta.sendCommand('ON');
// Set dishwashing program
tiskikoneenOhjelma.sendCommand('Dishcare.Dishwasher.Program.Auto2');
// Start dishwasher
tiskikoneenKaynnistys.sendCommand('start');
// Repeat the command to actually start the dishwasher.
tiskikoneenKaynnistys.sendCommand('start');
console.log('Dishwasher: Started.');
}
else {
console.log('Dishwasher: No state change needed.');
}
Only comment is that if you are only interested to start the dish washer when the cheapest hour starts, you could set the number of hours to 1 instead of 4 in your control point script.
This is OK even if your program would last longer than 1 hour, because note of your rule logic will turn the machine off, you only have logic to turn it on.
Just a thought…
Markus
P.s. The name “waterheater.js” is a terrible name for this script but whatever, it works… Much better name would be “control-point-optimizer.js” or something similar because that’s what it actually is… This again proves the old story to be true that there are only two difficult things in computer science: 1) Finding good names, 2) Invalidating cache and 3) offset by one.
I found out the dishwasher ends up waiting for the start command infinitely. Repeating the start command starts the device. Edited the code above to reflect this change.
