README.md

moonPhase

A library for esp32 to get the moon phase angle and percentage of the moon that is illuminated. (as seen from Earth)
Preferred methods to install is to use the Arduino IDE library manager.

For esp8266 non-os or avr (Arduino) you can use the steve-sienk fork.

Manual install

1. Download the latest release and unpack in the Arduino libraries folder.
2. Restart the Arduino IDE.

Functions

• getPhase() Get the current moon phase. (First set freeRTOS system time - see the esp32-sntp example)

• getPhase( time_t t ) Get the moon phase as it was at time t.

Example code

#include <moonPhase.h>

moonPhase moonPhase;                       // include a MoonPhase instance

void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.println( "moonPhase simple example." );

  moonData_t moon;                        // variable to receive the data

  moon = moonPhase.getPhase();            // gets the current moon phase ( 1/1/1970 at 00:00:00 UTC )

  Serial.print( "Moon phase angle: " );
  Serial.print( moon.angle );             // angle is a integer between 0-360
  Serial.println( " degrees." );
  Serial.print( "Moon surface lit: " );
  Serial.print( moon.percentLit * 100 );  // percentLit is a real between 0-1
}

void loop() {
  // put your main code here, to run repeatedly:

}