Is it possible to add a Sensor to a Gateway directly?

[free118]

Hello all,
just a question.
Is it possible to add a Sensor (Analog In) directly to a Gateway (arduino) and comunicate this value over USB?

What I want to do is the following:
I've one Sensor which communicate over the Gateway to my Pimatic (over serial USB)
Now I want to add a second Sensor, which is physicaly very close to the Gateway.
So i want to add it there, and it should communicate to Pimatic as well.
Kind of an internal "Sensor" device.

So is this possible? If yes how?

Thanks
Free

[mfalkvidd]

@free118 Welcome to the MySensors community!

Yes it is possible. Just add it to the gateway sketch, just as if you were adding it to a normal sensor node sketch.

[free118]

Ok great,
that's what I've done.
But which Node and Child ID is needed for this. So that the Input will communicate as a "Sensor" to the gateway.

Because the Pimatic plugin need to know where to look.

// Enable debug prints to serial monitor
#define MY_DEBUG
// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69
// Set LOW transmit power level as default, if you have an amplified NRF-module and
// power your radio separately with a good regulator you can turn up PA level.
#define MY_RF24_PA_LEVEL RF24_PA_LOW

// Enable serial gateway
#define MY_GATEWAY_SERIAL

// Define a lower baud rate for Arduino's running on 8 MHz (Arduino Pro Mini 3.3V & SenseBender)
#if F_CPU == 8000000L
#define MY_BAUD_RATE 115200
#endif

// Enable inclusion mode
#define MY_INCLUSION_MODE_FEATURE
// Enable Inclusion mode button on gateway
//#define MY_INCLUSION_BUTTON_FEATURE

// Inverses behavior of inclusion button (if using external pullup)
//#define MY_INCLUSION_BUTTON_EXTERNAL_PULLUP

// Set inclusion mode duration (in seconds)
#define MY_INCLUSION_MODE_DURATION 60
// Digital pin used for inclusion mode button
//#define MY_INCLUSION_MODE_BUTTON_PIN  3

// Set blinking period
#define MY_DEFAULT_LED_BLINK_PERIOD 300

// Inverses the behavior of leds
//#define MY_WITH_LEDS_BLINKING_INVERSE

// Flash leds on rx/tx/err
// Uncomment to override default HW configurations
//#define MY_DEFAULT_ERR_LED_PIN 4  // Error led pin
//#define MY_DEFAULT_RX_LED_PIN  6  // Receive led pin
//#define MY_DEFAULT_TX_LED_PIN  5  // the PCB, on board LED

#include <MySensors.h>
#define ArrayLenth 10
#define PH_SENSOR_ANALOG_PIN A0
unsigned long lastSend = 0;
static const unsigned long SEND_FREQUENCY = 5000;

float lastPhValue;
static const float deltaPhValue = 0.5;

#define MY_NODE_ID 10
#define CHILD_ID_PH_LOCAL 1

MyMessage msg(0, V_PH);
void setup()
{
	// Setup locally attached sensors
}

double analogReadAverage(uint8_t pin, unsigned long ms)
{
    ...
	
    return average;
}

float getPH()
{
		...
        
    if (sendTime || abs(PhValue - lastPhValue) > deltaPhValue)
    {
        Serial.print("pH:");
        Serial.print(PhValue, 2);
       // Serial.println(" ");
               
        lastPhValue = PhValue;
        
        //send(msg.set(PhValue, 1));
        send(msg.set(PhValue, 51));
       
    }
  return lastPhValue;
}


void presentation()
{
	sendSketchInfo("PH Local","1.1");
  present(CHILD_ID_PH_LOCAL,S_WATER_QUALITY); 
}

void loop()
{

  float ph = getPH();
  
	// Send locally attached sensor data here
}

Here the working Pimatic config for a Sensor through a gateway.

      "plugin": "mysensors",
      "driver": "serialport",
      "protocols": "1.5.1",
      "startingNodeId": 1,
      "driverOptions": {
        "//": "'/dev/ttyUSB0' if using serial Gateway",
        "serialDevice": "/dev/ttyUSB1",
        "baudrate": 115200
      }```

```{
      "id": "phmeter",
      "name": "pHmeter",
      "class": "MySensorsPH",
      "nodeid": 9,
      "sensorid": 0,
      "xAttributeOptions": []
    }```


 Thanks

[mfalkvidd]

I have no experience with Pimatic, but the child ID will be CHILD_ID_PH_LOCAL and the node ID will be 0 (gateways always have node ID=0).

[free118]

Thanks for the answer. I tried this and it didn't work. I've started a thread in pimatic forum as well. Maybe they know how to do this.
Thanks