💬 The Sensor Network

[jkandasa]

@RagoTube
Note: I didn't test this code. I believe it should work.

Sender node

#define MY_DEBUG
#define MY_RADIO_RF24
#define MY_NODE_ID 21

#define DISPLAY_NODE_ID 0

#define TEMPERATURE_SENSOR_ID 0

#include "MySensors.h"

// triggering interval
static const uint32_t trigger_ms = 10000; // 10 seconds

uint32_t lastTrigger = 0;
MyMessage msgGeneral(TEMPERATURE_SENSOR_ID, V_TEMP);

void setup() {
}

void presentation() {
  sendSketchInfo("Temperature node 1", "1.0");
  present(TEMPERATURE_SENSOR_ID, S_TEMP, "Temperature");
}

void loop() {
  if (millis() - lastTrigger > trigger_ms) {
    lastTrigger = millis();
    // set destination address
    msgGeneral.setDestination(DISPLAY_NODE_ID);
    
    // get temperature from your temperature sensor
    float lastTemperature = 0.0; // update from your sensor

    // send message to display node
    send(msgGeneral.set(lastTemperature));
  }
}

Display node (Gateway node)

#define MY_DEBUG
#define MY_RADIO_RF24
#define MY_GATEWAY_SERIAL

#define TEMPERATURE_SENSOR_ID 0
#define TEMPERATURE_NODE_ID 21

#include "MySensors.h"

float lastTemperature = 0.0;

void presentation() {
  sendSketchInfo("Display node / Gateway", "1.0");
}

void setup() {
}

void loop() {
}

void updateDisplay() {
  // update your display with "lastTemperature"
}

void receive(const MyMessage &message) {
  if (message.sender == TEMPERATURE_NODE_ID) { // message from temperature node
    if (message.sensor == TEMPERATURE_SENSOR_ID && message.type == V_TEMP) { // message from temperature sensor
      lastTemperature = message.getFloat();
      updateDisplay(); // update display
    }
  }
}

[RagoTube]

Thank you so much and very kind of you. I will try this.

[RagoTube]

Hai jkandasa, It works fine, thank you so much for your examples and it cleared lot my doubts. Thanks again, you have given me good start.

[RagoTube]

Hi, I missed to notice that, it works as long as the Gateway is ON, when I turn off the Gateway it stops receiving the data. I assumed that your example "Node2Node" code will work with out a Gateway in between. Please advice.

[jkandasa]

@RagoTube looks like we need a gateway in a sensor network and with the help of gateway node-node communication can happen. The beauty of MySensors gateway is, you can use your gateway as a node.
I just updated my example shown here. Now the display node is a gateway node.

[RagoTube]

Thanks again for your immediate advice. It should be OK now.