Node-red-contrib-sunpos NPM

node-red-contrib-sunpos

A Node-RED node to calculate the position of the sun at a given location.

Install

Run the following command in the root directory of your Node-RED install

npm install node-red-contrib-sunpos

Usage

This node calculates the position of the sun at a given location. It is configured with the following properties:

lat: latitude of the location
lon: longitude of the location
start: time of day that constitutes the start of daylight hours
startOffset: offset to be applied for start of daylight hours, a negative value brings the start forward, a positive value delays
end: time of day that constitutes the end of daylight hours
endOffset: offset to be applied for end of daylight hours

This node can optionally receive a time via an input message containing msg.time conforming to Javascript Date object, otherwise it will use the current time.

This node emits a msg.payload with the following properties:

startTime: time of day that constitutes the start of daylight hours (inclusive of offset)
endTime: time of day that constitutes the end of daylight hours (inclusive of offset)
sunInSky: boolean value indicating whether it is currently considered daylight hours
altitude: altitude of the sun above the horizon in degrees
azimuth: azimuth of the sun in degrees, where 0 is North
altitudeRadians: altitude of the sun above the horizon in radians
azimuthRadians: azimuth of the sun in radians, where 0 is South, a positive value is in the west and negative value in the east

The node also sets the following msg properties: