💬 Relay

[gohan]

We need to use the internal reference since it is the only stable voltage source and you need the voltage divider to lower the measured voltage between 0 and 1.1v. There are not many options to choose from

[fhenryco]

i also just realized that there is a special AREF pin intended for what i was thinking about ... but it's not available on the mini pro.

My measurements using Vcc as Ref have been indeed very fluctuating, however what i get was highly sufficient to monitor the battery feeding a 3.3v step up regulator to the arduino and help anticipate failure

[skywatch]

I just noticed another thing that should be changed in the 'relay with button' sketch....

S_LIGHT should be S_BINARY
V_LIGHT shoud be V_STATUS

[APL2017]

I would like to clarify operation of the sketch, where more than 1 sensors input are used along with more than 1 relay actuator. in one node

1. Does node need unique child ID for each sensor input AND relay output?
2. If that is the case how child ID is assigned to relay actuators in the above examples?

[jopebe]

This is a nice sketch and it is very universal for relays. Now m looking for a similar sketch for digital inputs such as buttons i.e.. I would like to join both. The problem: I want to use a mega for reading status of a lot of digital outputs (min.20) of another ISP. It is only High or Low. Only when the level changes, I want the mega send a message to the gateway. I tried this "for" loop, but it didnt help. There are too many informations sent to the gateway. I imagine a solution, where only a change at the pin will create an information, that is sent to the gateway.
Here my test, which didnt run:
void loop()
{

for (int sensor=16, pin=BIN_1; sensor<=NUMBER_OF_BIN; sensor++, pin++)
{
int BUTT;
int BUTTOLD;
BUTT =digitalRead(pin);
if (BUTT != BUTTOLD && BUTT !=0){
MyMessage msg(sensor, V_TRIPPED);
send(msg.set(BUTT ? "1" : "0"));
}
BUTTOLD = BUTT;
wait (900);
}
}
Has anybody an idea or a hint for me?

[gohan]

I believe there is a logic error in the sketch as you would need to declare global variables BUTTOLD_XX unique for each button, otherwise how can you keep track of the variable between each loop and FOR iteraction?

[jopebe]

Thank You for Your quick answer.
Do I understand You correctly: I must index the BUTTOLD?
As BUTTOLD[pin) for example or how? Where?

[gohan]

You need to create the single variables one by one, unless somebody else has a better way to do it

[Mitja Blazinsek]

why i can't compile for arduino pro mini on other boards i can upload

[mfalkvidd]

@mitja-blazinsek the error messages are usually essential to figuring out. Did you get any?

[Mitja Blazinsek]

Arduino: 1.8.1 (Windows 7), Board: "Arduino Pro or Pro Mini, ATmega168 (5V, 16 MHz)"

In file included from c:\users\mitja\appdata\local\arduino15\packages\arduino\tools\avr-gcc\4.9.2-atmel3.5.4-arduino2\avr\include\avr\io.h:99:0,

             from c:\users\mitja\appdata\local\arduino15\packages\arduino\tools\avr-gcc\4.9.2-atmel3.5.4-arduino2\avr\include\avr\pgmspace.h:90,

             from C:\Users\mitja\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.6.20\cores\arduino/Arduino.h:28,

             from sketch\button_relay.ino.cpp:1:

C:\Users\mitja\Documents\Arduino\libraries\MySensors/hal/architecture/AVR/MyHwAVR.cpp: In function 'bool hwUniqueID(uint8_t (*)[16])':

C:\Users\mitja\Documents\Arduino\libraries\MySensors/hal/architecture/AVR/MyHwAVR.cpp:246:26: error: 'SIGRD' was not declared in this scope

((uint8_t)uniqueID) = boot_signature_byte_get(0x00);

                      ^

C:\Users\mitja\Documents\Arduino\libraries\MySensors/hal/architecture/AVR/MyHwAVR.cpp:247:30: error: 'SIGRD' was not declared in this scope

((uint8_t)uniqueID + 1) = boot_signature_byte_get(0x02);

                          ^

C:\Users\mitja\Documents\Arduino\libraries\MySensors/hal/architecture/AVR/MyHwAVR.cpp:248:30: error: 'SIGRD' was not declared in this scope

((uint8_t)uniqueID + 2) = boot_signature_byte_get(0x04);

                          ^

C:\Users\mitja\Documents\Arduino\libraries\MySensors/hal/architecture/AVR/MyHwAVR.cpp:249:30: error: 'SIGRD' was not declared in this scope

((uint8_t)uniqueID + 3) = boot_signature_byte_get(0x01); //OSCCAL

                          ^

Multiple libraries were found for "Bounce2.h"
Used: C:\Users\mitja\Documents\Arduino\libraries\Bounce2
Not used: C:\Users\mitja\Documents\Arduino\libraries\Bounce2-master
exit status 1
Error compiling for board Arduino Pro or Pro Mini.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

[Mitja Blazinsek]

OK it's probaly because ia have mini with 168 chip i have to buys 328 :( again wait 1month to arive from china

[lekeb]

hello.
I am building a node with several kind of sensors and two relays.
My sensors use CHILD ID from 0 to 3. I would like to start child ID of relay from 4.
How I can't do that with this sketch?
I guess I have to change this part of sketch :
"for (int sensor=1, pin=RELAY_PIN; sensor<=NUMBER_OF_RELAYS; sensor++, pin++) {
// Register all sensors to gw (they will be created as child devices)
present(sensor, S_BINARY);"

correct?

thanks

[rejoe2]

@lekeb
You may do something like this:
In Header:

uint8_t DS_First_Child_ID = 7; //First Child-ID to be used by Dallas Bus

an then in presentation():

for (int i = 0; i < numSensors && i < MAX_ATTACHED_DS18B20; i++) {
    present(i + DS_First_Child_ID, S_TEMP);
}

But afaik, it's not recommended to shift the ChildID's for relays but always start with 1. Imo it's better to change the ChildID's of the other attached sensors. You may also take care (in case of shifting ID's) about a consistent mapping from ID to the PINs where the relays are attached.

[gohan]

Agreed, set you sensors to higher ID numbers like 20 or 30 and you are good to go .

[lekeb]

ok thanks a lot I will try this night

[lekeb]

perfect it works great. I started my temperature sensor at CHILD ID 4 and let relays from 1 to 2. I had to add also "DS_First_Child_ID" in the sent message to gateway.
thanks

[pepson]

Hi
Please put to this topic code your sketch....
Thanks

[lekeb]

Sur,

my node controls two relays, one water pressure sensor and three DS18b20

/**
 code pour controle cave a vin, temp et pression
 */

// Enable debug prints to serial monitor
//#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_NRF24

// Enable repeater functionality for this node
#define MY_REPEATER_FEATURE

#define MY_NODE_ID 15
#include <SPI.h>
#include <MySensors.h>
#include <DallasTemperature.h>
#include <OneWire.h>

#define BARO_CHILD 0 //Child ID for pressure sensor
#define BAR_SENSOR_ANALOG_PIN 0 // pin for pressure sensor

#define COMPARE_TEMP 1 // Send temperature only if changed? 1 = Yes 0 = No

#define ONE_WIRE_BUS 5 // Pin where dallase sensor is connected 
#define MAX_ATTACHED_DS18B20 16
#define RELAY_PIN 3 //pin for first relay
#define NUMBER_OF_RELAYS 2
#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

OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
DallasTemperature sensors(&oneWire); // Pass the oneWire reference to Dallas Temperature. 
float lastTemperature[MAX_ATTACHED_DS18B20];
int numSensors=0;
bool receivedConfig = false;
bool metric = true;
float lastpression;
uint8_t DS_First_Child_ID = 4; //First Child-ID to be used by Dallas Bus
MyMessage pressureMsg(BARO_CHILD, V_PRESSURE);
MyMessage msg(0,V_TEMP);


void before()
{
    for (int sensor=1, pin=RELAY_PIN; sensor<=NUMBER_OF_RELAYS; sensor++, pin++) {
        // Then set relay pins in output mode
        pinMode(pin, OUTPUT);
        // Set relay to last known state (using eeprom storage)
        digitalWrite(pin, loadState(sensor)?RELAY_ON:RELAY_OFF);
    }
    
    // Startup up the OneWire library
  sensors.begin();
}

void setup()
{
   
// requestTemperatures() will not block current thread
  sensors.setWaitForConversion(false);
}

void presentation()
{
    // Send the sketch version information to the gateway and Controller
    sendSketchInfo("Buanderie node", "1.0");

    //present pressure sensor
    present(BARO_CHILD, S_BARO);

    for (int sensor=1, pin=RELAY_PIN; sensor<=NUMBER_OF_RELAYS; sensor++, pin++) {
        // Register all sensors to gw (they will be created as child devices)
        present(sensor, S_BINARY);
    }

    
// Fetch the number of attached temperature sensors  
  numSensors = sensors.getDeviceCount();

  // Present all sensors to controller
  for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {   
     present(i + DS_First_Child_ID, S_TEMP);
  }
}



void loop()
{
  //read water pressure
int lecture_adc = analogRead(BAR_SENSOR_ANALOG_PIN);
  float pression = ((lecture_adc*5/1024.0)-0.50)/1.7;
  if(pression != lastpression) { 
      send(pressureMsg.set(pression, 2));
  lastpression = pression;
  }
  
  
  // Fetch temperatures from Dallas sensors
  sensors.requestTemperatures();

  // query conversion time and sleep until conversion completed
  int16_t conversionTime = sensors.millisToWaitForConversion(sensors.getResolution());
  // sleep() call can be replaced by wait() call if node need to process incoming messages (or if node is repeater)
  sleep(conversionTime);

  // Read temperatures and send them to controller 
  for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {

    // Fetch and round temperature to one decimal
    float temperature = static_cast<float>(static_cast<int>((getControllerConfig().isMetric?sensors.getTempCByIndex(i):sensors.getTempFByIndex(i)) * 10.)) / 10.;

    // Only send data if temperature has changed and no error
    #if COMPARE_TEMP == 1
    if (lastTemperature[i] != temperature && temperature != -127.00 && temperature != 85.00) {
    #else
    if (temperature != -127.00 && temperature != 85.00) {
    #endif

      // Send in the new temperature
      send(msg.setSensor(i + DS_First_Child_ID).set(temperature,1));
      // Save new temperatures for next compare
      lastTemperature[i]=temperature;
    }
  }
}

void receive(const MyMessage &message)
{
    // We only expect one type of message from controller. But we better check anyway.
    if (message.type==V_STATUS) {
        // Change relay state
        digitalWrite(message.sensor-1+RELAY_PIN, message.getBool()?RELAY_ON:RELAY_OFF);
        // Store state in eeprom
        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());
    }
}

[gohan]

@lekeb said in 💬 Relay:

MyMessage pressureMsg(BARO_CHILD, V_PRESSURE);
MyMessage msg(0,V_TEMP);

Why are you using the same child ID (since you set #define BARO_CHILD 0)?