Best posts made by Corvl

My house is getting all automated by now , thanks to vera and Z-wave. And now Arduino comes into play !!

My heating system is also automated , by means of Fibaro relais which turns things (the system itself or pumps) on and off. And radiators have danfoss Z-wave thermostats attached to it.

But my floorheating ..... that was a different story. It had a special thermostat with a temperature sensor going a device which measures the water in the floorheating system.

Allready demolished a danfoss Z-wave thermostate , trying to make the tempretaure sensor external , but no joy.

Huray for Arduino.

Building the gateway was easy enough, building a servo-actuator with an arduino UNO was also very easy.

On vera there was an issue with the slider , with the slider the servo only moves 90 degrees. someone helped me changing some code on the sketch:

fixed it by replacing the line:

myservo.write(SERVO_MAX + (SERVO_MIN-SERVO_MAX)/100 * val); // sets the servo position 0-180

by the following 2 lines of code:

    val = map(val, 0, 100, 0, 180); // scale 0%-100% between 0 and 180)
    myservo.write(val);       // sets the servo position 0-180

Now the servo was moving the full 180 degrees by means of the slider.

Than came the mechanical part, I had to make quite a bracket to hold the servo. Initially I had a standard 3 kg/cm servo , but it wasn't enough to completely close the valve. I ended up using a big scale servo with 14 kg/cm on 7V. Offcourse the servo is powered by a seperate 7V, max 5A power supply

Initially the plan was to attach the servo directly to the thermostat , at that time I didn't know the themostat not only turns , but also moves in-and outwards .....

Plan 2 was to use a timing belt system with 2 sprockets , also this didn't work , because the servo pulled the thermostat towards it

Plan 3 finally worked , I routed out of trespa a bracket where the servo could go freely in and out , but not turn itself.
This trespa ( white) attached to the metal bracket. Now the servo can do it's normal thing , turn the lever , but also move in and outward

Here 2 pictures:

A succesfull project I must say

pffff , 84 pages ..... it is something I have to read I guess .

Thanks for the info ..... I will report here if it is working ......

Cor

@ BartE , thanks a lot , I changed all the _Off to _OFF and the same with the On , gw. wait as well. also the 500 to 5000

Working perfectly !

Many thanks

I haven't had a definite anwer yet if libabry 2.x works on vera , I have only read about problems . For the moment I stick to 1.5

edit : one small thing I just noticed , when I switch via the vera Gui the relais to off , it nicely goes back to on after 5 seconds , but it doesn't report back to vera that it is again in an on state.

is there still something wrong with the code?

Again many thanks,
Cor

For future reference:

// Example sketch showing how to control physical relays. 
// This example will remember relay state even after power failure.

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

#define RELAY_1  3  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)
#define NUMBER_OF_RELAYS 1 // Total number of attached relays
#define RELAY_ON 1  // GPIO value to write to turn on attached relay
#define RELAY_OFF 0 // GPIO value to write to turn off attached relay

MySensor gw;

void setup()  
{   
  // Initialize library and add callback for incoming messages
  gw.begin(incomingMessage, AUTO, true);
  // Send the sketch version information to the gateway and Controller
  gw.sendSketchInfo("Relay", "1.0");

  // Fetch relay status
  for (int sensor=1, pin=RELAY_1; sensor<=NUMBER_OF_RELAYS;sensor++, pin++) {
    // Register all sensors to gw (they will be created as child devices)
    gw.present(sensor, S_LIGHT);
    // Then set relay pins in output mode
    pinMode(pin, OUTPUT);   
    // Set relay to last known state (using eeprom storage) 
     if (gw.loadState(sensor) == RELAY_OFF) {
     digitalWrite(pin, RELAY_OFF);
     gw.wait(5000);
     digitalWrite(pin, RELAY_ON);
}
  }
}


void loop() 
{
  // Alway process incoming messages whenever possible
  gw.process();
}

void incomingMessage(const MyMessage &message) {
  // We only expect one type of message from controller. But we better check anyway.
  if (message.type==V_LIGHT) {
     // Change relay state
 if (message.getBool() == RELAY_OFF) {
digitalWrite(message.sensor-1+RELAY_1, RELAY_OFF);
gw.wait(5000);
digitalWrite(message.sensor-1+RELAY_1, RELAY_ON);
}
     // Store state in eeprom
     gw.saveState(message.sensor, message.getBool());
     // Write some debug info
     Serial.print("Incoming change for sensor:");
     Serial.print(message.sensor);
     Serial.print(", New status: ");
     Serial.println(message.getBool());
   } 
}```