How to add a sensor to the serial gateway

[sundberg84]

Hi @Bram81
Looks good so far... i was just about to suggest the domoticz forum, but then i saw this: link text and i guess its you :)

In the link (Rain & Moisture scetch) it looks like the GW.present: gw.present(CHILD_ID, S_MOTION);
Does this mean its presented as a motion sensor? @hek ?

Anyhow - in the Domoticz code there is not any code for S_MOTION so you have to request this.
MySensorsBase.cpp

I dont know what happens if you try to present is a humidity sensor? Both humidity and soil is presented as % ??

Br

[Bram81]

Hi@sundberg84 Yes, that's me.. ;-) I saw that file too, but being still a newbie in Mysensors, Arduino and sketches I didn't really know how to use it. Do I have to put in my libraries folder and add a line #include <filename> in the gateway sketch..?

Right now the sensor is automatically seen as a certain device, within Domoticz there is no way to present it otherwise right?

[sundberg84]

If you mean MySensorsBase.cpp - no thats the domoticz scourscode and you dont use that in the sensor/gateway.
Looking closer at the code shows also your sensors sends V_TRIPPED to domoticz, and thats why you get on/off.

I dont know it this works, but i would try to change:
MyMessage msg(CHILD_ID, V_TRIPPED);
to
MyMessage msg(CHILD_ID, V_HUM);

and
gw.present(CHILD_ID, S_MOTION);
to
gw.present(CHILD_ID, S_HUM);

and upload the scetch to the Moisture sensor again...
It will present the sensor in domoticz as a Humidity sensor but as I said i hope both Moisture and Humidity presents its value from 0-100 %

Br

[Bram81]

Hey, thanks for your help. The sensor presents itself as a Humidity sensor and shows a value of 1% even after adding water to the ground nothing changes, so it seems it's not being updated correctly.

Last week when I was just playing around for the first time with the arduino and sensor used this simple sketch:

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

void setup() {
// declare the ledPin as an OUTPUT:
Serial.begin(9600);
}

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

Using the analog output on the sensor and analog0 on the arduino. The values are presented in number between 1-1200 (aprox.)

Even readings in just a number would be fine for me / can be easily transered to a % I guess, where a value of aprox 300 is liquid water and 1050 is the value read when the sensor is in the open air and not sticked in the soil.

Can you think of alike types of sensors with values presented in that range?

[sundberg84]

Hi @Bram81

Yes - the analog is 0 - 1023 and many use it to measure battery %.
This can be converted to % pretty much by dividing it by 10 i think

int sensorValue = analogRead(sensorPin);
Serial.println(sensorValue);
sensorValue  = sensorValue / 10;

You can do much more with upper and lower limits... its just a matter of math and code.

Edit:
This is used in the battery when we want figures from 1.9 (VMIN)-3.3V (VMAX)... maybe it can help you somhow:

int Pcnt = static_cast<int>(((Vbat-VMIN)/(VMAX-VMIN))*100.);```

[sundberg84]

Doing some fast math here: Vbat = your analog read value (say 500 as example), VMIN = 300 VMAX = 1023 gives us
500 - 300 / 1023-300 = 200/ 723 = 0,27 = 27%

[Bram81]

@sundberg84 Hi, I've been trying to modify the sketch

But it gives me errors I cant resolve... Got to a point where the node send back info to the gateway:

683
send: 3-3-0-0 s=0,c=1,t=1,pt=2,l=2,st=ok:0
682
send: 3-3-0-0 s=0,c=1,t=1,pt=2,l=2,st=ok:0
683
send: 3-3-0-0 s=0,c=1,t=1,pt=2,l=2,st=ok:0
682
send: 3-3-0-0 s=0,c=1,t=1,pt=2,l=2,st=ok:0

Also Domoticz was receiving info, log showed :+1:
2015-07-02 10:31:24.898 (Gateway) Temp + Humidity (TempHum)
2015-07-02 10:31:24.914 (Gateway) Temp + Humidity (TempHum)
2015-07-02 10:31:24.929 (Gateway) Temp + Humidity (TempHum)
2015-07-02 10:31:24.944 (Gateway) Temp + Humidity (TempHum)
2015-07-02 10:31:24.959 (Gateway) Temp + Humidity (TempHum)
2015-07-02 10:31:24.975 (Gateway) Temp + Humidity (TempHum)
2015-07-02 10:31:24.990 (Gateway) Temp + Humidity (TempHum)
2015-07-02 10:31:25.005 (Gateway) Temp + Humidity (TempHum)

But still the humidity switch was showing either 0% or 1%.
I guess that is propably because the values must be transfered into % in the sketch, but I am kind of stuck...

[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