How to add a sensor to the serial gateway

[sundberg84]

@Bram81
I would try (not at home and cant try):

int Analog_Input_Soil_Sensor= A0;
int Analog_Input_Soil_Sensor = 0;

as you wrote before, and not #define interrupt analog_input_soil_sensor -2

Also you get only 0 and 1 because this is what you send to the gateway: gw.send(Msg.set(soilva... 0?1:0)
Either you have to define what 0 and 1 is (say dry = 0 moist = 1) or if you want to send it as % use another gw.send code.

[sundberg84]

Here is an example of someone build a soil sensor using the light_sensor
http://forum.mysensors.org/topic/1492/soil-moisture-analog-input-question
If you remove the battery code this could be used if you connect to analog pin (Se code below)

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

#define CHILD_ID_LIGHT 0
#define LIGHT_SENSOR_ANALOG_PIN 1

MySensor gw;
MyMessage msg(CHILD_ID_LIGHT, V_LIGHT_LEVEL);
int lastLightLevel;

void setup()
{
gw.begin();

// Send the sketch version information to the gateway and Controller
gw.sendSketchInfo("Soil_Moist_Sensor_grb", "1.15");

// Register all sensors to gateway (they will be created as child devices)
gw.present(CHILD_ID_LIGHT, S_LIGHT_LEVEL);
}

void loop()
{
int lightLevel = (1023-analogRead(LIGHT_SENSOR_ANALOG_PIN))/10.23;
Serial.println(lightLevel);
if (lightLevel != lastLightLevel) {
gw.send(msg.set(lightLevel));
lastLightLevel = lightLevel;
}
}

if you want lightlevel in % with a Min and a Max then:

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

#define CHILD_ID_LIGHT 0
#define LIGHT_SENSOR_ANALOG_PIN 1
#define MIN 300  // Liquid
#define MAX 1023 // Air

MySensor gw;
MyMessage msg(CHILD_ID_LIGHT, V_LIGHT_LEVEL);
int lastLightLevel;

void setup()
{
gw.begin();

// Send the sketch version information to the gateway and Controller
gw.sendSketchInfo("Soil_Moist_Sensor_grb", "1.15");

// Register all sensors to gateway (they will be created as child devices)
gw.present(CHILD_ID_LIGHT, S_LIGHT_LEVEL);
}

void loop()
{
int lightLevel = static_cast<int>(((analogRead(LIGHT_SENSOR_ANALOG_PIN)-MIN)/(MAX-MIN))*100.);
Serial.println(lightLevel);
if (lightLevel != lastLightLevel) {
gw.send(msg.set(lightLevel));
lastLightLevel = lightLevel;
}
}

I have read some more...
About the digital pin and use (as you mentioned at first... )
It looks like there is a switch/nob on the hardware you can turn.
This will set the trigger point between dry and moist and send 1 or 0.
I think thats why the scetches was using S_Motion... either its dry (untriggered) or wet (triggered).
I dont know how to program or wire this though...

Best of luck :) Hope i didnt just complicate things...

[Bram81]

@sundberg84 Hey! Thank you verry much for your help and suggestions!!
I actually got it working combining your sketch witch my simple one resulting in this:

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

#define CHILD_ID_LIGHT 0
#define LIGHT_SENSOR_ANALOG_PIN 1
#define MIN 300 // Liquid
#define MAX 1023 // Air

int sensorPin = A0; // select the input pin for the potentiometer
int sensorValue = 0; // variable to store the value coming from the sensor

MySensor gw;
MyMessage msg(CHILD_ID_LIGHT, V_LIGHT_LEVEL);
int lastLightLevel;

void setup(){

Serial.begin(9600);

gw.begin();

// Send the sketch version information to the gateway and Controller
gw.sendSketchInfo("Soil_Moist_Sensor_grb", "1.15");

// Register all sensors to gateway (they will be created as child devices)
gw.present(CHILD_ID_LIGHT, S_LIGHT_LEVEL);
}

void loop(){
// read the value from the sensor:
sensorValue = analogRead(sensorPin);
delay(1000);
Serial.print("sensor = " );
Serial.println(sensorValue);
gw.send(msg.set(sensorValue));
}

The sensor shows up in Domoticz as a light sensor meassuring in lux, but the numbers do match the output of the sensor.

Another thing is that after about 15 min the gateway started functioning. Seems like a problem that I had last week returned...
Loading the board with the pingpongtest shows that suddenly my radio chip is recognized as NRF24L01 instead of the + version, although the label on te chips shows NRF24L01+
Changing radios doesn't help, I'm completely in the dark... maybe just shitty radios..?

[mortommy]

Hi @hek , the link above it's broken. Is it yet available anywhere?
Thank you.

[hek]

It has been merged now. Available here:
https://github.com/mysensors/Arduino