Power/ Usage sensor - multi channel - local display

[MarkV]

@AWI
I´m using a LAN GW, i disconnected the serial and made the LAN one of it.
Mmm, the comms error is strange, they're at max one meter apart, with a tiny plaster wall in between, both also got a cap between vcc and gnd.
Next weekend i´m going to have a look at the slave input, rather strange that it doesn´t receives pulses.
I connected the 5volt line to all the 6 pulse meters and connected their output to D2 - D8, through a cord of network cable.
Thanks for all your help so far!!!!!

[jeti]

@AWI
thanks! as i do not have display (yet) i just did the calculations in the "sendPowerUpdate" -> now it works perfect :smile:
I just double check with a powermeter to see if everything is ok.

[AWI]

@MarkV just one tip for today... You should connect the common ground to the pulse meters. The inputs use a pull-up to vcc..

[MarkV]

Dawm maybe thats the problem..
I connected the 5v as commen to the pulse + and the - to the digital inputs.

So to be sure i need to connect the pulse + to the digitale inputs and the pulse - to gnd????

[AWI]

@MarkV I would depend on your S0 meters, but normal is "open collector" so you can connect '-' to ground and '+' to the input (= pull-up to Vcc).

(another way to connect is + to vcc and - to input, but then you need external "pull down" resistors and change the sketch)

[MarkV]

Then thats the problem with the slave arduino getting no data. I connected the pulse output like you mentioned second and didn't changed the sketch.
Maybe i'm home tomorrow then i will give it a try.
Or is it hard to chsnge the sketch? And what should i change?

[AWI]

@MarkV it is indicated in the sketch but you also need external resistors for pull-down. If you disable the internal pull-up resistors the levels are inverted. So you also need to'invert' the measurements or you are measuring the pulse width instead of the time between pulses.

[MarkV]

Tonight i checked the wires and changed them and i believe your wright, the output is:

But it keeps giving a error, so i hangt them near each other with approx. 10cm space in between, why does it stil say fail after a good startup with ok and after 10a20sec it starts saying fail..

Is the readout correct?
And what more could cause the fail error?

[AWI]

@MarkV In most of the cases "fail" is related to the power supply of the radio. Did you follow the instructions for connection of the radio?

[FotoFieber]

@AWI
Your measurement sketch is really nice. There is one line I do not understand.

prateAccum += prate - 2000;

Is this prateAccum needed or couldn't it be left away? What is the meaning of 2000 in this context?

Cu,
FotoFieber

[AWI]

@FotoFieber To be honest .. a left over from some experiments. Just leave it out... you won't notice the difference.

[jeti]

@AWI thanks again!
I am using your sketches with only one S0 Meter (the 2000pulse/kwh one).
*One thing i just found out, that as long as the master arduino is connected to the serial port of my pc it is running fine but when its not, it does not send.I have checked the voltage at the radio and it is the same... I also do not have any display or rotary encoder, as I do the visualisation with FHEM.
Do you know why this is the case? * -> Voltage was to low... but the secon question remains:

Any idea to use differen pulses/kwh S0 meters? for example one 2000pulse/kwh and one 800 pulse/kwh.
thanks in advance!

[marten]

Arduino: 1.6.5 (Windows 7), Board:"Arduino Nano, ATmega328"

sketch_oct03e:128: error: 'V_TEXT' was not declared in this scope
sketch_oct03e.ino: In function 'void setup()':
sketch_oct03e:162: error: 'S_INFO' was not declared in this scope
sketch_oct03e.ino: In function 'void loop()':
sketch_oct03e:337: error: 'V_TEXT' was not declared in this scope
sketch_oct03e.ino: In function 'void incomingMessage(const MyMessage&)':
sketch_oct03e:364: error: 'V_TEXT' was not declared in this scope
'V_TEXT' was not declared in this scope

Dit rapport zou meer informatie hebben met
"Tijdens de compilatie uitgebreide uitvoer weergeven"
ingeschakeld in Bestand > Voorkeuren.

[marten]

this is what i'll get when trying to upload the master sketch

[AWI]

@marten You need to use the "Development" branch of MySensors until the production version gets updated -or- you can uncomment the lines with "const int ..."

// new V_TEXT variable type (development 20150905)
//const int V_TEXT = 47 ;
// new S_INFO sensor type (development 20150905)
//const int S_INFO = 36 ;

[jeti]

This post is deleted!

[AWI]

@jeti as mentioned in a previous post..

There are a few ways of getting it changed:

You can keep/ leave most as it is and when you send/ or display the values divide the pulses by two and double the Watt values in the routines "LCD_local_display" and "sendPowerUpdate"

or: make the necessary calculations when the data comes in. This is a little more complicated in routine "storeMeterJSON" but if you understand the logic (including error corrrection) should be not too hard.

I don't have the time at this moment to do it for you...

[jeti]

@AWI: :smiley: nevermind I will start workin on it
Thanks again for the great work!

[jeti]

was not that much work :smiley:
this is the modified master-sketch from AWI i am starting to use. The changes i made:
-deletion of LCD and rotray part
-deletion of accumulation part
-modified meterType to meter800, meter1000 and meter2000 this reflects meters with 800imp/khw;1000imp/kwh;2000imp/kwh

I am using this with only one meter (2000imp/kwh) for now and works pretty nicly second different meter type is on the way.

As I am a beginner please be gentle with comments :-)

#include <MySensor.h>                   // MySensors network
#include <SPI.h>
#include <Time.h> 
#include <ArduinoJson.h>                // used to parse the simple JSON output of the pulse meter https://github.com/bblanchon/ArduinoJson

// Constants & globals
const int NO_METERS = 1 ;               // actual meters used (max 12)
const int NODE_ID = 152 ;                // fixed MySensors node ID

const int JSON_LENGHT = 80 ;            // Maximum json string length

// new V_TEXT variable type (development 20150905)
const int V_TEXT = 47 ;
// new S_INFO sensor type (development 20150905)
const int S_INFO = 36 ;

char lastLCD1[21] = "--                  "; // LCD message line

typedef enum meterTypes: int8_t {meter800, meter1000, meter2000} ;             // metertype meter800, meter1000, meter2000; 
const char METER_NAMES[NO_METERS][4] = {"PC"} ; // meter names
const meterTypes METER_TYPES[NO_METERS] = {meter2000};

const unsigned long idleTime = 10000 ;  // Delay time for any of the states to return to idle
unsigned long idleTimer ;               // Delay timer for idleTime



union {                                 // used to convert long to bytes for EEPROM storage
    long kWhLongInt;
    uint8_t kWhLongByte[4];
    } kWhLong ;


// Possible states for the state machine.
// Idle: default state, show totals for in/out nett
// Browse: dive into meter details 
// Update: update meter value (Wh total)
// Reset: reset day values
enum States: int8_t {IDLE, BROWSE, UPDATE, RST} ;
uint8_t State = IDLE;                   // current state machine state

// meter class, store all relevant meter data (equivalent to struct)
class pulseMeter              
{
public:                                  
    long UsageWh;                       // last (current) usage (in W) from pulse counter
    long UsageAccumWh;                  // usage accumulator (to keep in sync) from pulse counter
    long PowerW;                        // actual power, calculated from pulse "rate"
    long DayUsageWh;                    // daily usage for display
    meterTypes Type;                    // metertype for addition in totals: meter800, meter1000, meter2000; 
    char Name[4] ;                      // meter name for display
};
pulseMeter pulseMeters[NO_METERS] ;     // define power meters
//pulseMeter meter800, meter1000, meter2000; //  pulse/kWh
unsigned long tempUsageWh ;             // temporary store while manually updating (state UPDATE) 

// Json parser:  define parse object: <10> = number of tokens in JSON: ~10 per m (4 * [key, value] + key_total, value_total))
// example: "{\"m\":1,\"c\":12,\"r\":120000,\"cA\":12345}"
char json[JSON_LENGHT] ;        // Storage for serial JSON string (init for example)

// flags & counters 
bool timeReceived = false;              // controller time
bool newDay = false;                    // reset at 00:00:00
unsigned long lastUpdate=0, lastRequest=0, lastDisplay=0, lastSyncKWH=0;  // loop timers for once in while events
int updateMeter = 0;                    // current meter for update
bool updateDisplayFlag = true ;         // indicate that display needs to be updated
int currentMeter = 0;                   // active meter for update & check, cycles through meters (0..NO_METERS-1)
int lastRotary = 0;                     // last rotary encoder position
int updateIncrement = 1000 ;            // Interval multiplier for Update 
int errCount = 0 ;                      // error counter
// *** Definition and initialisation
// define the MySensor network
MySensor gw;                            // pins used RFX24(default 9,10)
    
// Initialize messages for sensor network
MyMessage powerMsg(0,V_WATT);           // message to send power in W
MyMessage usageMsg(0,V_KWH);            // message to send usage in kWH
MyMessage textMsg(0,V_TEXT);            // message to send/receive text



// function to reset the Arduino (jump to 0 address)
void(* resetFunc) (void) = 0;//declare reset function at address 0

void setup(void)
{
    gw.begin(incomingMessage, NODE_ID, false);              // this node is fixed, no repeat
    //Send the sensor node sketch version information to the gateway
    gw.sendSketchInfo("AWI-12ChannelPulse", "2.0");
    // Initialize the meter names
    
    // Register all Pulse counters to gw (they will be created as child devices from 0 to MAX-1)
    for (int x = 0; x < NO_METERS; x++){ 
        gw.present(x, S_POWER, METER_NAMES[x]);             // present power meters to gateway
        delay(10);                                          // give it some time to process
        }
    
    delay(100);

    
    for (int x = 0; x < NO_METERS; x++){                    // initialize previous kWh values from EEPROM and init
        for (int y = 0; y < 4 ; y++){                       // convert from bytes
            kWhLong.kWhLongByte[y]= gw.loadState(x *4 + y) ;// EEPROM position = meter number * 4 bytes
            }                                               // controller is updated later automatically
        pulseMeters[x].UsageWh = kWhLong.kWhLongInt;
        strcpy(pulseMeters[x].Name, METER_NAMES[x] );       // copy string for meter names
        pulseMeters[x].Type = METER_TYPES[x];               // Set type
        }
 }

void loop(void)
{
    // Before specific states, perform generic tasks
    unsigned long now = millis();                           // Timer in loop for "once in a while" events
    gw.process() ;                                          // process incoming messages
    // If no time has been received yet, request it every 10 second from controller
    if ((!timeReceived && (now-lastRequest > 10*1000)) ||   
        (now-lastRequest > 3600000UL)){                     // request update every hour to keep in sync
        Serial.println(F("requesting time"));               // Request time from controller. 
        timeReceived = false;
        gw.requestTime(receiveTime);  
        lastRequest = now;
    }
    // Check if new day has started (hour == 0) and reset day usage counters of meters
    if (hour()==0 && !newDay){
        newDay = true;
        for (int x = 0; x < NO_METERS; x++){ 
            pulseMeters[x].DayUsageWh = 0 ;                 // reset daily counters
            saveMeters(x);                                  // save meter values to EEPROM
        }   
    } else if(hour() != 0 && newDay)                        // reset newday flag if hour != 0
        { newDay = false;}
     
    // Every 10 seconds update one meter to controller to avoid traffic jams
    if (now-lastSyncKWH > 10000){
    //    printPulsemeter(updateMeter);
        sendPowerUpdate(updateMeter);                               // update the values for currentMeter
        updateMeter++ ;
        if (updateMeter >= NO_METERS){                              // increment and wrap current meter
            updateMeter = 0 ;}
        lastSyncKWH = now ;
        }
        
    // Update sensors every 10 secs
    if (now-lastUpdate > 10000) {
        // get values to be displayed from controller
        
        lastUpdate = now;
    }
    
    // get readings from serial (sent every 10s)
    // format {"m":meter,"c":count,"r":rate, "cA":countAccum}
    // use JSON parser to process (could be replaced by simple split routine, but this works just fine)
    if(readLineJSON(Serial.read(), json, JSON_LENGHT) > 0 ){        //dummySerial(), Serial.read()
    // if(readLineJSON(dummySerial(), json, 80) > 0 ){              //dummySerial(), Serial.read()
        Serial.println(json);
        storeMeterJSON(json);                                       //store the meter reading
        //calcMeterTotals();                                          // update totals
        }
}

// This is called when a new time value was received
void receiveTime(unsigned long controllerTime) {
    // Ok, set incoming time 
    Serial.print(F("Time value received: "));
    Serial.println(controllerTime);
    setTime(controllerTime);                                        // set the clock to the time from controller
    timeReceived = true ;
}

// This is called when a message is received 
void incomingMessage(const MyMessage &message) {
  // Expect few types of messages from controller, V_VAR1 for messages
    if (message.type==V_TEXT) {
        // if message comes in, update the kWH reading for meter with value since last update
        // Write some debug info
        //Serial.print("Last reading for sensor: ");
        //Serial.print(message.sensor);                
        //Serial.print(", Message: ");
        //Serial.println(message.getString());

        }
    }


// save Meter to EEPROM when needed
void saveMeters(int8_t meterNo){
    kWhLong.kWhLongInt = pulseMeters[meterNo].UsageWh ;                     // convert to separate bytes via struct
    for (int y = 0; y < 4 ; y++){
        gw.saveState(meterNo * 4 + y, kWhLong.kWhLongByte[y])  ;            // EEPROM position = meter number * 4 bytes
        }
    }

void sendPowerUpdate(int meterNo)
// Sends update to controller for current meter 
{
    gw.send(powerMsg.setSensor(meterNo).set((long)pulseMeters[meterNo].PowerW));            // meterNo * 100 ));
    gw.send(usageMsg.setSensor(meterNo).set((float)pulseMeters[meterNo].UsageWh/1000L ,3)); // send in kWh!
}

int storeMeterJSON(char *json)
/* convert JSON to values and store in corresponding meter (if used)
 input: JSON string (can be wrong formatted), with length
 output: changed meter record number or -1 if error
 use JsonParser 
*/
{
  StaticJsonBuffer<50> jsonBuffer;                          // 4 object  -> 4 + 4*10 = 44
  // char njson[] = "{\"m\":1,\"c\":12,\"r\":120000,\"cA\":12345}";
    JsonObject& root = jsonBuffer.parseObject(json);
  if (!root.success())
    {
        Serial.println(F("JsonParser.parse() failed"));
        errCount++ ;
        return -1;
    }
  int m = (long)root["m"];
  if (m > NO_METERS){                                       // meter value out of range for used meters (m starts at 1)
    return -1 ;
  } else {                                                  // update meter values, Power is momentary, Usage is cumulative
    long newAccumWh = (long)root["cA"] ;
    long newWh = (long)root["c"] ;
    long diffAccumWh = newAccumWh - pulseMeters[m-1].UsageAccumWh;  // check for missed pulses by comparing cA with last stored value
    if (diffAccumWh >= newWh){                              // no difference or missed pulses -> correct: add difference
        pulseMeters[m-1].UsageWh += diffAccumWh;
        pulseMeters[m-1].DayUsageWh += diffAccumWh;
        }
    else {                                                  // negative diff, out of sync -> add pulses only (can be out of range or restart)
        pulseMeters[m-1].UsageWh += newWh;
        pulseMeters[m-1].DayUsageWh += newWh;
        }
    pulseMeters[m-1].UsageAccumWh = newAccumWh;             // always update sync counter (only for sync and error correction(serial))
    if ((long)root["r"] == 0){                              // calculate power from pulse rate (ms) and truncate to whole Watts
      pulseMeters[m-1].PowerW = 0;                          // if overflow assume no Usage
    } else if (pulseMeters[m-1].Type == meter800){
      pulseMeters[m-1].PowerW = long( 3600000000L / (long)root["r"]*0.8); // rate in microseconds for 800 pulse/kWh
      }
      else if (pulseMeters[m-1].Type == meter1000){
      pulseMeters[m-1].PowerW = long( 3600000000L / (long)root["r"]); // rate in microseconds for 1000 pulse/kWh
      }
       else if (pulseMeters[m-1].Type == meter2000){
       pulseMeters[m-1].PowerW = long( 3600000000L / (long)root["r"]/2); // rate in microseconds for 2000 pulse/kWh
      }
      else {
        Serial.println("geht nicht");
        }
    return m ;
  }
}

int readLineJSON(int readch, char *buffer, int len)
/* checks for JSON and when started append char tot buffer and checks for line completion 
usage:
  static char buffer[80];
  if (readline(Serial.read(), buffer, 80) > 0) { // line complete}
  returns simple JSON
  */
{
  static int pos = 0;
  int rpos;

  if (readch > 0) {
    switch (readch) {
      case '\n':                // Ignore new-lines
        break;
      case '\r':                // Return on CR
        rpos = pos;
        pos = 0;                  // Reset position index ready for next time
        return rpos;
      default:
        if (pos < len-1) {
          buffer[pos++] = readch;
          buffer[pos] = 0;
        }
    }
  }
  // No end of line has been found, so return -1.
  return -1;
}

/*
int dummySerial()
// Acts as a dummy JSON serial character generator for debugging
// input: none
// output: preset JSON string
{
  static int pos = 0;
  char json[] = "{\"m\":1,\"c\":12,\"r\":120000,\"cA\":12345}\r{\"m\":2,\"c\":212,\"r\":2120000,\"cA\":212345}\r{\"m\":3,\"c\":212,\"r\":2120000,\"cA\":212345}\n\r";
  if (pos++ >= strlen(json)){
    pos = 0;
  } 
  return json[pos] ;
  
}
*/


/*

void printPulsemeter(int meter)
// prints the Pulsemeter record to serial out
{
  Serial.print("m:");
  Serial.print(meter);
  Serial.print("type:");
  Serial.print(pulseMeters[meter].Type);
  Serial.print(", power: ");
  Serial.print(pulseMeters[meter].PowerW);
  Serial.print(", usage: ");
  Serial.print(pulseMeters[meter].UsageWh);
  Serial.print(", day usage: ");
  Serial.println(pulseMeters[meter].DayUsageWh );
//  Serial.print(", Ca: ");
//  Serial.println(pulseMeters[meter].UsageAccumWh);
}
*/

[MarkV]

Good evening,

After a couple of weeks, again i'm busy with my arduino's, but now i have a rasberry with domoticz near my arduino, so i don't need to send it wireless.
Is there a possibility to connect the master or slave arduino directly to my rasberry and read out the pulse meters???