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Shield_CT1234.ino
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/*
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
}
}