Serial gateway with the API

[skatun]

Hi
I am pretty new to the mysensor project, but I really like it!

So I have a few questions regarding my setup. So I have an Raspberry Pi running openhab, to this I am trying to connect 4 arduinos, 3 of them through usb and the last one through voltage converter and serial on GPIO. I am currently making 6 sensor nodes

Each nodes has 2 pir sensors, dht22,light sensor, sound sensor, and co2 sensor. Due to the processing load, my idea was to split these sensors over two arduino uno(atmega 328). Is that a good idea? (The problem is that I am trying to detect which of the two pir sensor were triggered first to see if you are going in or out of the room, hence they will get triggered with >50ms interval).

Then i have the serial on GPIO arduino nano(due to the fact it was easier to solder 12m cable to the gpio pins instead of terminating it to the usb.) which reads 4 buttons and controlls 4 solid state relays for my bar.

Then finally I have a arduino controlling several led strips, connected through USB.

So as a start I managed to get the serial gateway to work by just writing serial.print("12,7,1,0,23.6\n") but now I want to expand it to use real sensors and this is when i get stuck.... Do I need to throw away the libraries since these only work with the radio modem, or should i rewrite them to work with the serial connection or how do I proceed? I need to set the baudrate and give them static node ID. Below is my modified code, that does not work..

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

#define CHILD_ID_HUM 0
#define CHILD_ID_TEMP 1
#define HUMIDITY_SENSOR_DIGITAL_PIN 11
unsigned long SLEEP_TIME = 1000; // Sleep time between reads (in milliseconds)

MySensor gw;
DHT dht;
float lastTemp;
float lastHum;
boolean metric = true; 
MyMessage msgHum(CHILD_ID_HUM, V_HUM);
MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);


void setup()  
{ 
  gw.begin(NULL,12);
  dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 

  // Send the Sketch Version Information to the Gateway
  gw.sendSketchInfo("Humidity", "1.0");

  // Register all sensors to gw (they will be created as child devices)
  gw.present(CHILD_ID_HUM, S_HUM);
  gw.present(CHILD_ID_TEMP, S_TEMP);
  
  metric = gw.getConfig().isMetric;
}

void loop()      
{  
  delay(dht.getMinimumSamplingPeriod());

  float temperature = dht.getTemperature();
  if (isnan(temperature)) {
      Serial.println("Failed reading temperature from DHT");
  } else if (temperature != lastTemp) {
    lastTemp = temperature;
    if (!metric) {
      temperature = dht.toFahrenheit(temperature);
    }
    gw.send(msgTemp.set(temperature, 1));
    Serial.print("T: ");
    Serial.println(temperature);
  }
  
  float humidity = dht.getHumidity();
  if (isnan(humidity)) {
      Serial.println("Failed reading humidity from DHT");
  } else if (humidity != lastHum) {
      lastHum = humidity;
      gw.send(msgHum.set(humidity, 1));
      Serial.print("H: ");
      Serial.println(humidity);
  }

  gw.sleep(SLEEP_TIME); //sleep a bit
}

Thanks for any feedback

[hek]

In the dev-branch you can disable radio support for gw-nodes completely.

[skatun]

@skatun said:

gw.send(msgTemp.set(temperature, 1));

So if I understand you correctly in the development version the method gw.send will then be equal to :
Serial.print(GwId,NodeID,1,0,msgTemp.set(temperature, 1)\n)

And in the examples I will then just comment out all the serial.print statements or?

Thanks

[hek]

@skatun
You just do sending the same way on gateway as on the nodes.

send(msgTemp.set(temperature, 1))