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Re: emonTx V2.2 Build Guide
Submitted by santosh.singh on Sat, 10/08/2013 - 08:32.
My EmonTx fails to send RF signals.

I soldered the PCB with components. And then connected it to the IDE using FTDI. I can run my own LED sketches they work fine. But when I used the Emonlib example sketch the Arduino hangs when sendWait is issued.

//CT 1 is always enabled
const int CT2 = 1;                                                      // Set to 1 to enable CT channel 2
const int CT3 = 1;                                                      // Set to 1 to enable CT channel 3

#define 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.433MHZ, RF12_868MHZ or RF12_915MHZ. You should use the one matching the module you have.
const int nodeID = 10;                                                  // emonTx RFM12B node ID
const int networkGroup = 210;                                           // emonTx RFM12B wireless network group - needs to be same as emonBase and emonGLCD needs to be same as emonBase and emonGLCD

const int UNO = 1;                                                      // Set to 0 if your not using the UNO bootloader (i.e using Duemilanove) - All Atmega's shipped from OpenEnergyMonitor come with Arduino Uno bootloader
#include <avr/wdt.h>                                                    // the UNO bootloader

#include <JeeLib.h>                                                     // Download JeeLib: http://github.com/jcw/jeelib
ISR(WDT_vect) { Sleepy::watchdogEvent(); }

#include "EmonLib.h"
EnergyMonitor ct1,ct2,ct3;                                              // Create  instances for each CT channel
typedef struct { int power1, power2, power3, Vrms; } PayloadTX;         // neat way of packaging data for RF comms
PayloadTX emontx;

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

unsigned long timer = millis();

void setup()
{
  Serial.begin(9600);
  Serial.println("emonTX CT123 Voltage example");
  Serial.println("OpenEnergyMonitor.org");
  Serial.print("Node: ");
  Serial.print(nodeID);
  Serial.print(" Freq: ");
  if (freq == RF12_433MHZ) Serial.print("433Mhz");
  if (freq == RF12_868MHZ) Serial.print("868Mhz");
  if (freq == RF12_915MHZ) Serial.print("915Mhz");
  Serial.print(" Network: ");
  Serial.println(networkGroup);

  ct1.voltageTX(228.268, 1.7);                                         // ct.voltageTX(calibration, phase_shift) - make sure to select correct calibration for AC-AC adapter  http://openenergymonitor.org/emon/modules/emontx/firmware/calibration. Default is set for Ideal Power voltage adapter.
  ct1.currentTX(1, 111.1);                                            // Setup emonTX CT channel (channel (1,2 or 3), calibration)
                                                                      // CT Calibration factor = CT ratio / burden resistance
  ct2.voltageTX(234.26, 1.7);                                         // CT Calibration factor = (100A / 0.05A) x 18 Ohms
  ct2.currentTX(2, 111.1);

  ct3.voltageTX(234.26, 1.7);
  ct3.currentTX(3, 111.1);

  rf12_initialize(nodeID, freq, networkGroup);                          // initialize RF
  rf12_sleep(RF12_SLEEP);

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

  if (UNO) wdt_enable(WDTO_8S);                                         // Enable anti crash (restart) watchdog if UNO bootloader is selected. Watchdog does not work with duemilanove bootloader                                                             // Restarts emonTx if sketch hangs for more than 8s
}

void loop()
{
  if ((millis()-timer)>5000)
  {
    timer = millis();

    ct1.calcVI(20,2000);                                                  // Calculate all. No.of crossings, time-out
    emontx.power1 = ct1.realPower;
    Serial.print(emontx.power1);
  
    emontx.Vrms = ct1.Vrms*100;                                          // AC Mains rms voltage

    if (CT2) {
      ct2.calcVI(20,2000);                                               //ct.calcVI(number of crossings to sample, time out (ms) if no waveform is detected)                                       
      emontx.power2 = ct2.realPower;
      Serial.print(" "); Serial.print(emontx.power2);
    }

    if (CT3) {
      ct3.calcVI(20,2000);
      emontx.power3 = ct3.realPower;
      Serial.print(" "); Serial.print(emontx.power3);
    }
  
    Serial.print(" "); Serial.print(ct1.Vrms);

    Serial.println(); delay(100);

    send_rf_data();                                                       // *SEND RF DATA* - see emontx_li
    digitalWrite(LEDpin, HIGH); delay(40); digitalWrite(LEDpin, LOW);      // flash LED
    emontx_sleep(5);                                                      // sleep or delay in seconds - see emontx_lib
  }
}

I have modified the code to blink the LED on pin 13. If I comment out send_rf_data() command then the LED blinks.

On further debugging, I found out that rf12_sendWait(2) is blocking and not returning at all. If I comment that line then the blinking is fine.

help please?

I also checked the schematic on http://solderpad.com/openenergymon/emontx/ and compared it with the soldered connections using http://www.hoperf.com/upload/rf/rfm12b.pdf

I found that the SEL pin on RFM12B is not connected to pin 16 of M/Controller. I am not sure if that is change in design?

I also tried to see if IRQ pin number matches the RF12.cpp library definitions.

I will appreciate any feedback on how to verify the setup?

Please suggest best course of action to get this resolved?

»
santosh.singh's picture
Re: emonTx V2.2 Build Guide
Submitted by santosh.singh on Sat, 10/08/2013 - 08:35.
My EmonTx fails to send RF signals.

I soldered the PCB with components. And then connected it to the IDE using FTDI. I can run my own LED sketches they work fine. But when I used the Emonlib example sketch the Arduino hangs when sendWait is issued.

I have modified the code to blink the LED on pin 13. If I comment out send_rf_data() command then the LED blinks.
On further debugging, I found out that rf12_sendWait(2) is blocking and not returning at all. If I comment that line then the blinking is fine.

help please?

I also checked the schematic on http://solderpad.com/openenergymon/emontx/ and compared it with the soldered connections using http://www.hoperf.com/upload/rf/rfm12b.pdf

I found that the SEL pin on RFM12B is not connected to pin 16 of M/Controller. I am not sure if that is change in design?

I also tried to see if IRQ pin number matches the RF12.cpp library definitions.

I will appreciate any feedback on how to verify the setup?

Please suggest best course of action to get this resolved?