publish libraries to avoid users to have to download them one by one

lib/RFM69/Examples/SonarMote/SonarMote_DistanceReader/SonarMote_DistanceReader.ino

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+// Sample sketch for the SonarMote - Simple distance reading
+// http://lowpowerlab.com/sonar
+// Ultrasonic sensor (HC-SR04) connected to D6 (Trig), D7 (Echo), and power enabled through D5
+// Make sure you adjust the settings in the configuration section below !!!
+// **********************************************************************************
+// Copyright Felix Rusu, LowPowerLab.com
+// Library and code by Felix Rusu - felix@lowpowerlab.com
+// **********************************************************************************
+// License
+// **********************************************************************************
+// This program is free software; you can redistribute it 
+// and/or modify it under the terms of the GNU General    
+// Public License as published by the Free Software       
+// Foundation; either version 3 of the License, or        
+// (at your option) any later version.                    
+//                                                        
+// This program is distributed in the hope that it will   
+// be useful, but WITHOUT ANY WARRANTY; without even the  
+// implied warranty of MERCHANTABILITY or FITNESS FOR A   
+// PARTICULAR PURPOSE. See the GNU General Public        
+// License for more details.                              
+//                                                        
+// You should have received a copy of the GNU General    
+// Public License along with this program.
+// If not, see <http://www.gnu.org/licenses/>.
+//                                                        
+// Licence can be viewed at                               
+// http://www.gnu.org/licenses/gpl-3.0.txt
+//
+// Please maintain this license information along with authorship
+// and copyright notices in any redistribution of this code
+// **********************************************************************************
+#define TRIG 6
+#define ECHO 7
+#define EN   5
+
+void setup() {
+  pinMode (TRIG,OUTPUT);//attach pin 2 to vcc
+  pinMode (ECHO,OUTPUT);//attach pin 2 to vcc
+  pinMode (EN,OUTPUT);//attach pin 5 to GND
+  pinMode (ECHO, INPUT);//attach pin 4 to Echo
+  // initialize serial communication:
+  Serial.begin(115200);
+  digitalWrite(EN, LOW);
+}
+
+long cm;
+void loop()
+{
+  cm = readDistanceCM();
+  Serial.print(cm); Serial.println("cm");
+  delay(500);
+}
+
+long readDistanceCM()
+{
+  digitalWrite(EN, HIGH);
+  delay(75);
+  // The PING))) is triggered by a HIGH pulse of 2 or more microseconds.
+  // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
+  digitalWrite(TRIG, LOW);
+  delayMicroseconds(2);
+  digitalWrite(TRIG, HIGH);
+  delayMicroseconds(5);
+  digitalWrite(TRIG, LOW);
+  pulseIn(ECHO, HIGH);
+  delay(16);
+  digitalWrite(TRIG, LOW);
+  delayMicroseconds(2);
+  digitalWrite(TRIG, HIGH);
+  delayMicroseconds(5);
+  digitalWrite(TRIG, LOW);
+  // The same pin is used to read the signal from the PING))): a HIGH
+  // pulse whose duration is the time (in microseconds) from the sending
+  // of the ping to the reception of its echo off of an object.
+  long duration = pulseIn(ECHO, HIGH);
+  digitalWrite(EN, LOW);
+  return microsecondsToCentimeters(duration);
+}
+
+long microsecondsToInches(long microseconds)
+{
+  // According to Parallax's datasheet for the PING))), there are
+  // 73.746 microseconds per inch (i.e. sound travels at 1130 feet per
+  // second).  This gives the distance travelled by the ping, outbound
+  // and return, so we divide by 2 to get the distance of the obstacle.
+  // See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf
+  return microseconds / 74 / 2;
+}
+
+long microsecondsToCentimeters(long microseconds)
+{
+  // The speed of sound is 340 m/s or 29 microseconds per centimeter.
+  // The ping travels out and back, so to find the distance of the
+  // object we take half of the distance travelled.
+  return microseconds / 29 / 2;
+}