Count car-starts

mfalkvidd

What does that mean exactly? Write to eeprom when power disappear, how is that possible without power?

Writing is not instantaneous. It might only take a millisecond, but during that time things can happen. So when the write starts, there is enough power. But half-way through the write power is lost. That leaves the eeprom in an unknown state.

flopp

@mfalkvidd
Ok, I read it "to write as counting voltage drop" but it was "write to eeprom during voltage drop".
It is now clear, thanks

tbowmo

@flopp

A more exotic "hack" could be to tap into the OBD2 interface, and for example check engine RPM to see if motor is running, or not.

See this link..
http://mechanics.stackexchange.com/questions/24171/how-to-detect-engine-ignition-on-off-status-using-obd2

flopp

@tbowmo
Something like this?
This looks really nice, something I want to try later on
http://youtu.be/kmZ2PUMOKB8

flopp

My sketch seems to work, only problem is presentation in domoticz

I will add a buzzer to now when it has reported to gateway

tbowmo

@flopp

There is an howto here http://www.instructables.com/id/Hack-an-ELM327-Cable-to-make-an-Arduino-OBD2-Scann/ looks pretty simple to get going, and read out the RPM's..

flopp

@tbowmo
Nice, I will test in a few weeks

flopp

I have now solve the problem with storing data in Domoticz at correct day.

I have another node that send back the same value as it is right now, every 2 hours

flopp

Version 1.12, changes gw.wait when asking for VAR from 5 sec to 1 sec. also added support for Buzzer on D3

flopp

This post is deleted!

flopp

Keep-alive version. I noticed when this Node didn't get any response from Controller it send back 0, which means that this day will be very many starts

// Made by Daniel Nilsson
// Tested with Domoticz 3.4967
// Version 1.1
// 2016-05-10

//Keep-alive since Domoticz seems to not storing data if not data comes in for 3 hours(user setting)

#include <SPI.h>
#include <MySensor.h>

#define CHILD_ID 0                          // Id of the sensor child
#define NODE_ID 7                        // same ID as real Car Counter

int Controller;                             // Current start counts from Controller, like Domoticz

MySensor gw;
MyMessage volumeMsg(CHILD_ID,V_RAIN);
MyMessage lastCounterMsg(CHILD_ID,V_VAR1);

void setup()
{          
  delay(500);   // wait for radio
  
  //Begin
  gw.begin(incomingMessage, NODE_ID);
  // Register this device as Rain sensor (will not show in Domoticz until first value arrives)
  gw.present(CHILD_ID, S_RAIN);       
}

void loop()
{ 
  
    //Ask for starts from Controller.
  
      Serial.println("Request start counts");
      //gw.request(CHILD_ID, V_VAR1);
      while (Controller == 0) {
        gw.request(CHILD_ID, V_VAR1);
        Serial.println("No response from Controller");
        gw.wait(60000);
        }
      gw.wait(5000);
      
if (!resend((volumeMsg.set(Controller)), 5))return;
gw.wait(1000);
gw.sleep(120*60000); //less then timeout in Controller
}

// check if "st:fail" during gw.send, thanks n3ro
bool resend(MyMessage &msg, int repeats)
{
  int repeat = 1;
  boolean sendOK = false;
  int repeatdelay = 2000;

  while ((sendOK == false) and (repeat < repeats)) {
    if (gw.send(msg)) {
      sendOK = true;
    }
    else {
      sendOK = false;
      Serial.print("Error ");
      Serial.println(repeat);
    }
    repeat++; delay(repeatdelay);
  }
  if (sendOK == false && repeat == repeats){
    return false;
  }
  return true;
}

//Read if we have a incoming message.
void incomingMessage(const MyMessage &message) {
  if (message.type==V_VAR1) {
    Controller = message.getULong();
    //pcReceived = true;
    Serial.print("Received start counts from Controller: ");
    Serial.println(Controller);   
  }
}

flopp

Version 1.13 changed to fixed NODE_ID

// Made by Daniel Nilsson
// Tested with Domoticz 3.5721
// 2016-12-10

#include <SPI.h>
#include <MySensor.h>

#define CHILD_ID 0                          // Id of the sensor child
#define NODE_ID 7                            // a number or AUTO to let controller assign
#define SKETCH_NAME "Car start counter"     // Change to a fancy name you like
#define SKETCH_VERSION "1.13"                // Your version

int Controller;                             // Current start counts from Controller, like Domoticz
boolean pcReceived = false;                 // If we have recieved the start counts from Controller or not 
int starts;                                 // summary of all starts to be sent to Controller
int eeprom;                                 // start counts read from/to be stored in EEPROM


MySensor gw;
MyMessage volumeMsg(CHILD_ID,V_RAIN);
MyMessage lastCounterMsg(CHILD_ID,V_VAR1);

void setup()
{          
  pinMode(3,OUTPUT);
  delay(2*45000);  // Allow time if USB/cigarette plug is powered before you turned the key
  digitalWrite(3,HIGH);
  delay(300);
  digitalWrite(3,LOW);
  delay(300);
  digitalWrite(3,HIGH);
  delay(300);
  digitalWrite(3,LOW);
  //Begin
  gw.begin(incomingMessage, NODE_ID, false);
  
  // Send the Sketch Version Information to the Gateway
  gw.sendSketchInfo(SKETCH_NAME, SKETCH_VERSION);

  // Register this device as Rain sensor (will not show in Domoticz until first value arrives)
  gw.present(CHILD_ID, S_RAIN);       
  Serial.println("");
  eeprom = gw.loadState(0);                       // read EEPROM
  Serial.print(eeprom);                           // print EEPROM
  Serial.println(" starts have not been sent");
  Serial.println("add 1 start");
  Serial.print(eeprom);
  Serial.print("+1=");
  eeprom = eeprom + 1;
  Serial.println(eeprom);
  gw.saveState(0,eeprom);                         // store to EEPROM at position 0
  Serial.println("");
  
  Serial.println("Startup completed");
}

void loop()
{ 
  
    //See if we have the start counts from Controller - and ask for it if we dont.
    if (!pcReceived) {
      Serial.println("Request start counts");
      gw.request(CHILD_ID, V_VAR1);
      gw.wait(1000);
      return;
    }

Serial.println("");
eeprom = gw.loadState(0);                     // read EEPROM
Serial.print(eeprom);
Serial.println(" starts have not been sent");
Serial.print(Controller);
Serial.println(" starts from Controller");    
starts = Controller + eeprom;                 // total starts
Serial.print(eeprom);
Serial.print("+");
Serial.print(Controller);
Serial.print("=");
Serial.println(starts);
Serial.print("Send ");
Serial.print(starts);
Serial.println(" to Controller");
Serial.println("");

if (!resend((volumeMsg.set(starts)), 6))return;
if (!resend((lastCounterMsg.set(starts)), 6)) return;

Serial.println("");
Serial.println("store 0 to EEPROM");
gw.saveState(0,0);                            // set 0 start to EEPROM, all have been sent
Serial.println("sleep");                      // mission accomplished
digitalWrite(3,HIGH);
  delay(900);
  digitalWrite(3,LOW);
  
while(1){}

}

// check if "st:fail" during gw.send, thanks n3ro
bool resend(MyMessage &msg, int repeats)
{
  int repeat = 1;
  boolean sendOK = false;
  int repeatdelay = 2000;

  while ((sendOK == false) and (repeat < repeats)) {
    if (gw.send(msg)) {
      sendOK = true;
    }
    else {
      sendOK = false;
      Serial.print("Error ");
      Serial.println(repeat);
    }
    repeat++; delay(repeatdelay);
  }
  if (sendOK == false && repeat == repeats){
    return false;
  }
  return true;
}

//Read if we have a incoming message.
void incomingMessage(const MyMessage &message) {
  if (message.type==V_VAR1) {
    Controller = message.getULong();
    pcReceived = true;
    Serial.print("Received start counts from Controller: ");
    Serial.println(Controller);   
  }
}

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