Shield_CT1234.ino

/*
 EmonTx Shield 4 x CT example
 
  An example sketch for the emontx Arduino shield module for
 CT only electricity monitoring.
 
 Part of the openenergymonitor.org project
 Licence: GNU GPL V3
 
 Authors: Glyn Hudson, Trystan Lea
 Builds upon JeeLabs RF12 library and Arduino
 
 emonTx documentation: 	http://openenergymonitor.org/emon/modules/emontxshield/
 emonTx firmware code explination: http://openenergymonitor.org/emon/modules/emontx/firmware
 emonTx calibration instructions: http://openenergymonitor.org/emon/modules/emontx/firmware/calibration

 THIS SKETCH REQUIRES:

 Libraries in the standard arduino libraries folder:
	- JeeLib		https://github.com/jcw/jeelib
	- EmonLib		https://github.com/openenergymonitor/EmonLib.git

 Other files in project directory (should appear in the arduino tabs above)
	- emontx_lib.ino
 
*/

/*Recommended node ID allocation
------------------------------------------------------------------------------------------------------------
-ID-	-Node Type- 
0	- Special allocation in JeeLib RFM12 driver - reserved for OOK use
1-4     - Control nodes 
5-10	- Energy monitoring nodes
11-14	--Un-assigned --
15-16	- Base Station & logging nodes
17-30	- Environmental sensing nodes (temperature humidity etc.)
31	- Special allocation in JeeLib RFM12 driver - Node31 can communicate with nodes on any network group
-------------------------------------------------------------------------------------------------------------
*/

#define FILTERSETTLETIME 5000                                           //  Time (ms) to allow the filters to settle before sending data

const int CT1 = 1; 
const int CT2 = 1;                                                      // Set to 0 to disable 
const int CT3 = 1;
const int CT4 = 1;


#define RF_freq RF12_433MHZ                                                // Frequency of RF12B module can be RF12_433MHZ, RF12_868MHZ or RF12_915MHZ. You should use the one matching the module you have.
const int nodeID = 6;                                                  // emonTx RFM12B node ID
const int networkGroup = 210;                                           // emonTx RFM12B wireless network group - needs to be same as emonBase and emonGLCD                                                 

#define RF69_COMPAT 1 // set to 1 to use RFM69CW 
#include <JeeLib.h>   // make sure V12 (latest) is used if using RFM69CW
#include "EmonLib.h"
EnergyMonitor ct1,ct2,ct3, ct4;                                              // Create  instances for each CT channel

typedef struct { int power1, power2, power3, power4, nothing;} PayloadTX;      // create structure - a neat way of packaging data for RF comms, nothing is added a a 5th integer to match data structure of voltage version
PayloadTX emontx;                                                       

const int LEDpin = 9;                                                   // On-board emonTx LED 

boolean settled = false;

void setup() 
{
  Serial.begin(9600);
  Serial.println("emonTX Shield CT123 example"); 
  Serial.println("OpenEnergyMonitor.org");
  Serial.print("Node: "); 
  Serial.print(nodeID); 
  Serial.print(" Freq: "); 
  if (RF_freq == RF12_433MHZ) Serial.print("433Mhz");
  if (RF_freq == RF12_868MHZ) Serial.print("868Mhz");
  if (RF_freq == RF12_915MHZ) Serial.print("915Mhz"); 
 Serial.print(" Network: "); 
  Serial.println(networkGroup);
             
  if (CT1) ct1.current(1, 60.606);                                     // Setup emonTX CT channel (channel, calibration)
  if (CT2) ct2.current(2, 60.606);                                     // Calibration factor = CT ratio / burden resistance
  if (CT3) ct3.current(3, 60.606); 
  if (CT4) ct4.current(4, 60.606); 
  
 // emonTx Shield Calibration = (100A / 0.05A) / 33 Ohms
  
  rf12_initialize(nodeID, RF_freq, networkGroup);                          // initialize RFM12B
  rf12_sleep(RF12_SLEEP);                                             

  pinMode(LEDpin, OUTPUT);                                              // Setup indicator LED
  digitalWrite(LEDpin, HIGH);
  
}

void loop() 
{ 
  if (CT1) {
    emontx.power1 = ct1.calcIrms(1480) * 240.0;                         //ct.calcIrms(number of wavelengths sample)*AC RMS voltage
    Serial.print(emontx.power1);                                         
  }
  
  if (CT2) {
    emontx.power2 = ct2.calcIrms(1480) * 240.0;
    Serial.print(" "); Serial.print(emontx.power2);
  } 

  if (CT3) {
    emontx.power3 = ct3.calcIrms(1480) * 240.0;
    Serial.print(" "); Serial.print(emontx.power3);
  } 
  
   if (CT4) {
    emontx.power4 = ct4.calcIrms(1480) * 240.0;
    Serial.print(" "); Serial.print(emontx.power4);
  } 
  
  
  Serial.println(); delay(100);

  // because millis() returns to zero after 50 days ! 
  if (!settled && millis() > FILTERSETTLETIME) settled = true;

  if (settled)                                                            // send data only after filters have settled
  { 
    send_rf_data();                                                       // *SEND RF DATA* - see emontx_lib
    digitalWrite(LEDpin, HIGH); delay(2); digitalWrite(LEDpin, LOW);      // flash LED
    delay(2000);                                                          // delay between readings in ms
  }
}