Count car-starts
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@flopp said:
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.
@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 -
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 -
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 -
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..
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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); } } -
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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