Hi everyone,
After quite a bit of delay I have restarted my water heater project to connect my Paloma Waterheater to Vera.
The waterheater has 1x on/off push button, 1x temp up push button and 1x temp down push button.
In addition the heater has a status LED which shows whether the heater is on or off.
I have hacked the control panel of the heater and wired a 5v reed relay to each of the buttons.
High on the relay will bridge the push button and "simulate" a button press.
Arduino Pins 3, 4 and 5 are used for each of the relays with the other end of the spool connected to ground.
The LED is wired to Pin 6 which I want to use as an input - high >2V = ON state, low <2V = Off state. The LED voltage I get from the board looks like it is stepped down (If I connect a reed relay the relay flip flops very fast).
I tried around to get the code working based on the relay example posted on this page but I can't figure out how to adapt it as the relay code only would allow for m
Issues I have:
-
The relay code switches does not simulate a push button. As I only need the relay to pull for a short period of time - else the control panel will freaks out - how do I send a high impulse only on the respective pins (3-5)?
-
I would need the state - high or low - of Pin6 to update the button status in Vera for Pin 3 only. High - state = on, low - state = off without triggering the relay itself. This is to indicate in vera whether the heater is on or off in case someone pushed the button on the panel itself.
-
Each button will show up as a separate light switch in Vera - I assume that a new "type" and vera plugin would be required to have the on/off, temp up and down buttons all on one single device?
Could someone help me with the code for this?
Here is what I have so far (which is not much at all...):
// Paloma Waterheater Control based on mysensors.org Relay exmaple
#include <MySensor.h>
#include <SPI.h>
#define RELAY_1 3 // Arduino Digital I/O pin number for Water Heater On/Off push Button
#define RELAY_2 4 // Arduino Digital I/O pin number for Water Temp Up push Button
#define RELAY_3 5 // Arduino Digital I/O pin number for Water Temp Down push Button
#define NUMBER_OF_RELAYS 3 // Total number of attached relays
#define LED_PIN 6 // Arduino Digital I/O pin number for Heater LED On/Off State
#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");
// Setup the LED
pinMode(LED_PIN,INPUT);
// Activate internal pull-up
digitalWrite(LED_PIN,HIGH);
// 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)
digitalWrite(pin, gw.loadState(sensor)?RELAY_ON:RELAY_OFF);
}
}
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
digitalWrite(message.sensor-1+RELAY_1, message.getBool()?RELAY_ON:RELAY_OFF);
// 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());
}
}
Thanks !
