Firebase push code

ceasercode.ino

#include <Process.h>



//Call the set clock method in the setup method. i.e setClock()


void loop() {
    
    //Add this code where the data is to be sent from.
    
String url = "https://prepaid-water.firebaseio.com/data.json";

     epoch = timeInEpoch();

      //The values in the brackets are the variables.
      
    String data = "\"currentUnits\":" + String(currentUnits) + ", \"meterNumber\":" + String(meterNumber) + ", \"time\":" + String(epoch)  + ", \"vouncher\":" + String(vouncher);

    String jsonData = "{" + data + "}";
    
    Serial.println(jsonData);

    Process p;
    p.runShellCommand("curl -k -X POST " + url + " -d '" + jsonData + "'");
    while(p.running());
}  
    
    
    // Synchronize clock using NTP
void setClock() {  
  Process p;
  
  Serial.println("Setting clock.");
  
  // Sync clock with NTP
  p.runShellCommand("ntpd -nqp 0.openwrt.pool.ntp.org");
  
  // Block until clock sync is completed - 1433666585 is unix time for 7.6.2015 08:43:05 GMT
  while(timeInEpoch() < 1433666585);
}

//Returns a UNIX timestamp 

unsigned long timeInEpoch() {
  Process time;                   
  char epochCharArray[12] = "";

  // Get UNIX timestamp
  time.begin("date");
  time.addParameter("+%s");
  time.run();
  
  // When execution is completed, store in charArray
  while (time.available() > 0) {
    time.readString().toCharArray(epochCharArray, 12);
  }
  
  // Return long with timestamp
  return atol(epochCharArray);
}