• First, i'm using a Raspberry Pi Zero for the controller with an up-to-date Raspbian distro.
• I have the last 0.0.3.Final-SNAPSHOT of MyController.org(at least the one from 24 days ago with jkandasa's modification).
• I'm using the 2.0.0 version of MySensors (soon to be updated to the last version).
• On MyControler.org i created 2 UID tags (sunrize and sunset) which point to 2 dummy sensors (child of a MySensors node).
• Then i have the java script which send the sunrize and sunset value to this UID tags:

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

with(myImports) {
  //Get Sunrise/Sunset details
  var locSettings = mcApi.utils().getServerLocationSettings();

  //Get sensor variables for sunrise and sunset
  var sensorSunRise = mcApi.uidTag().getByUid("sunrize").getSensorVariable();
  var sensorSunSet = mcApi.uidTag().getByUid("sunset").getSensorVariable();

  //Update timezone offset values (by default gives GMT timestamp values)
  //sensorSunRise.value = locSettings.sunriseTime + locSettings.timezoneOffset;
  //sensorSunSet.value = locSettings.sunsetTime + locSettings.timezoneOffset;

  var dtr = new Date(locSettings.sunriseTime);
  sensorSunRise.value = dtr.getHours() + ':' + dtr.getMinutes();

  var dts = new Date(locSettings.sunsetTime);
  sensorSunSet.value = dts.getHours() + ':' + dts.getMinutes();

  //Send/Update thise sensorvariable with updated value
  mcApi.sensor().sendPayload(sensorSunRise);
  mcApi.sensor().sendPayload(sensorSunSet);
}

• On MyControler.org i created an Operation to execute the java script
• and a Timer to start the Operation before Sunrize every day.

For your java script you just need to add an if statement comparing the sunrize and sunset values with the current time, and you should be good.

I tried following the instructions on this post in order to create rules that would allow the payload forwarding only between sunset and sunrise time, but am stuck at the javascript portion, as it gives me an error when I try to run the script: "errorMessage": "TypeError: mcApi.utils().getServerLocationSettings is not a function in <eval> at line number 6".

SNAPSHOT version changes very often, can you give a try on latest one?

I tried following the instructions on this post in order to create rules that would allow the payload forwarding only between sunset and sunrise time, but am stuck at the javascript portion, as it gives me an error when I try to run the script: "errorMessage": "TypeError: mcApi.utils().getServerLocationSettings is not a function in <eval> at line number 6".

I could probably accomplish my goal in some other way, by using a photovoltaic cell, or modifying the script for this particular relay to request the time from the controller, but I'd really like to be able to create and use a rule on the controller itself.

Perhaps a revision of your step-by-step instruction on how to accomplish this is in order, as I am sure there are plenty people interested in using the sunrise/sunset times for enabling/disabling triggered actions.

PS. am using MySensors 2.1.0 and MyController 0.0.3.Final-SNAPSHOT

As a first step create a sensor with variables, In this example I am using sensor type as Custom and SensorVariable types as Variable 1 for sunrise and Variable 2 for sunset.

Add these sensorVariables to UidTag

JavaScript: (Type: Operation)

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

with(myImports) {
  //Get Sunrise/Sunset details
  var locSettings = mcApi.utils().getServerLocationSettings();
 
 //Get sensor variables for sunrise and sunset
  var sensorSunRise = mcApi.uidTag().getByUid("sunrise").getResource();
  var sensorSunSet = mcApi.uidTag().getByUid("sunset").getResource();
  
  //Update timezone offset values (by default gives GMT timestamp values)
  var sunrise = locSettings.sunriseTime + locSettings.timezoneOffset;
  var sunset = locSettings.sunsetTime + locSettings.timezoneOffset;

 //Convert milliseconds to seconds and load it in sensor variable value
  sensorSunRise.value = sunrise / 1000;
  sensorSunSet.value = sunset / 1000; 

  //Send/Update thise sensorvariable with updated value
  mcApi.sensor().sendPayload(sensorSunRise); 
  mcApi.sensor().sendPayload(sensorSunSet);
}

Note: I have introduced timezoneOffset on most recent build. You have to download snapshot build to execute above script. Thank you!

You can add this script on Timer, and you specify update this to your node on every day midnight.

Example:

JavaScript

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

with(myImports) {  
  var location = mcApi.utils().getServerLocationSettings();
}

Result:

{
  "myImports": {},
  "location": {
    "name": "Namakkal",
    "latitude": "11.2333",
    "longitude": "78.1667",
    "sunriseTime": 1481677080000,
    "sunsetTime": 1481718360000
  }
}

https://github.com/mycontroller-org/mycontroller/issues/322