Seems like a really basic question, but I couldn't work this out.

I have a node with two relays. I just want to be able to turn either one on or off by a rule. I can toggle them on or off via a widget, or from the action board, but I can't work out how to do it from an operation.
Could someone please point out the steps of doing this. I assumed it was go to operation -> add operation -> send payload -> sensor variable (select relay sensor status) and send payload. But I couldn't get this to work.

What am I missing?

@rjad said:

@jkandasa
Yes! I think the thing was setting the payload to 0 and 1 not On or Off, or ON or OFF.
I already have the off operation,

I mean I already have the on operation.

@jkandasa
Yes! I think the thing was setting the payload to 0 and 1 not On or Off, or ON or OFF.
I already have the off operation,

Here's a summary of my sensors:

And here is the operation I'm trying to set up:

so I can have a rule like:

So basically want to turn the relay off when the temperature drops below say 18, and turn it on when it goes above say 20.

Seems like a really basic question, but I couldn't work this out.

I have a node with two relays. I just want to be able to turn either one on or off by a rule. I can toggle them on or off via a widget, or from the action board, but I can't work out how to do it from an operation.
Could someone please point out the steps of doing this. I assumed it was go to operation -> add operation -> send payload -> sensor variable (select relay sensor status) and send payload. But I couldn't get this to work.

What am I missing?

Ok,I tested this but couldn't get it to work. Presumably I didn't follow the instructions properly. To try to understand it better, and to amuse myself, I wrote a script to do what I want, more or less. I use a javascript script to grab the data that I want:

// so you can optionally pass the bindings
// {'binHours': 12, 'nBins': 12} 
// but if you don't doesn't matter.

var myImports = new JavaImporter(java.io, java.lang, java.util, java.text);

with(myImports) {

var sVar = mcApi.uidTag().getByUid("kwh_uid").getSensorVariable(); 
var powerUsed = [];
var endTimes = [];

// check for some possible bindings:
if( typeof binHours === 'undefined' || !binHours ) {
  var binHours = 1
}

if( typeof nBins === 'undefined' || !nBins ) {
  var nBins = 5;
}
var binDuration = 1000*60*60*binHours;  //  hours in milliseconds

var endTime =  Date.now();
var startTime;

for(var i=0; i< nBins; i++ ) {
  startTime = endTime - binDuration;
  minMaxData = mcApi.metric().getSensorVariableMetricDouble(sVar, startTime, endTime); 
  powerUsed[i] = minMaxData.maximum - minMaxData.minimum;
  endTimes[i] = endTime.toString();
  endTime = startTime;
  }
}

And a template using d3.js:

<link rel=stylesheet type="text/css" href="myd3.css">
<div id="wrapper" style="text-align: center">    
  <canvas id="simpled3" style="display: none;"></canvas>
  <div style="font-size:11px" id="viz"></div>
</div>
<script>

var margin = {
    top: 15,
    right: 20,
    bottom: 30,
    left: 30
};
var width = 900- margin.left - margin.right;
var height = 360 - margin.top - margin.bottom;

// we get the data from the script

var x = d3.time.scale().range([0, width]);
var y = d3.scale.linear().range([height, 0]);

var xAxis = d3.svg.axis().scale(x)
    .orient("bottom").ticks(5);

var yAxis = d3.svg.axis().scale(y)
    .orient("left").ticks(5);

var valueline = d3.svg.line()
     .interpolate("step-before")   
    .x(function (d) {
      return x(d.date);
    })
    .y(function (d) {
      return y(d.watts);
    });
    
var svg = d3.select("#viz")
    .append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
   .attr("style", "outline: thin solid black;")
    .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

// Get the data
// should look like an array
// with each element date: milliseconds, watts: double
//

var data = [];
// get the values from the hash
// being careful of the indices which 
// turn out to be character strings
var hashIndex;

<#list endTimes?keys as k>
 hashIndex = +${k};
 data[hashIndex] = {date: new Date(+${endTimes[k]}),
                    watts: +${powerUsed[k]}}
</#list>

// Scale the range of the data
x.domain(d3.extent(data, function (d) {
    return d.date;
    }));
y.domain([0, d3.max(data, function (d) {
    return d.watts;
    })]);

svg.append("path") // Add the valueline path.
.attr("d", valueline(data));

svg.append("g") // Add the X Axis
.attr("class", "x axis")
    .attr("transform", "translate(0," + height + ")")
    .call(xAxis);

svg.append("g") // Add the Y Axis
.attr("class", "y axis")
    .call(yAxis);
</script>

Some settings are in the custom css file. You can then create a plot, specifying the size in hours of each bin (1 hour by default), and the number of bins to plot. It looks like:

So you can see when we get up in the mornings and when we cook tea in the evenings

With some work it could be better, so for example, I lose the hover information, and I had trouble getting two of these plots on one dashboard with different bins. But I'm not too worried, since at the moment my main concern is why the sensor keeps dropping out. When I work out my hardware issues I might try to do better with the software.

Thanks
Robert

Thanks jkandasa,
I'd be happy to get any tips on using bucketDuration, so let me know how you go. No rush though obviously.

Hi,
I've set up an electricity monitoring node, which basically counts pulses from my power meter (see https://www.mysensors.org/build/pulse_power) and it's working fine. But, it sends electricity consumption as kwh. What I'd like to do is to summarise this as watts each hour, so that you can see the consumption for each hour. I could calculate this in the sensor, but I was wondering if you could do something within mycontroller. So, for example each hour, find the total kwh used, and plot that. That way you can more easily see which periods of the day use more power than others.

Is this the sort of thing you can do within MyController.org?