Hello,
I develop for some time sensors for this purpose.
And I think now I have a variant found.
The technology is nothing special.
I simple use a MMA8452 connect to a Mysensors Note.
The evaluation does the Sketch.
Here my Sketch:
/******************************************************************************
MMA8452Q_Basic.ino
SFE_MMA8452Q Library Basic Example Sketch
Jim Lindblom @ SparkFun Electronics
Original Creation Date: June 3, 2014
https://github.com/sparkfun/MMA8452_Accelerometer
This sketch uses the SparkFun_MMA8452Q library to initialize the
accelerometer, and stream values from it.
Development environment specifics:
IDE: Arduino 1.0.5
Hardware Platform: Arduino Uno
**Updated for Arduino 1.6.4 5/2015**
This code is beerware; if you see me (or any other SparkFun employee) at the
local, and you've found our code helpful, please buy us a round!
Distributed as-is; no warranty is given.
******************************************************************************/
#include <Wire.h> // Must include Wire library for I2C
#include <SparkFun_MMA8452Q.h> // Includes the SFE_MMA8452Q library
#include <MySensor.h>
#include <Vcc.h>
const float VccMin = 0.0; // Minimum expected Vcc level, in Volts.
const float VccMax = 5.5; // Maximum expected Vcc level, in Volts.
const float VccCorrection = 5.0/5.0; // Measured Vcc by multimeter divided by reported Vcc
unsigned int countr = 0;
float peakMax0 = -1000.0;
float peakMax1 = -1000.0;
float peakMax2 = -1000.0;
unsigned long startMillis = 0;
Vcc vcc(VccCorrection);
#define CHILD_ID_BATT 0
#define CHILD_ID_MAXX 1
#define CHILD_ID_MAXY 2
#define CHILD_ID_MAXZ 3
MySensor gw;
MyMessage battmsg(CHILD_ID_BATT, V_VOLTAGE);
MyMessage maxxmsg(CHILD_ID_MAXX, V_LEVEL);
MyMessage maxymsg(CHILD_ID_MAXY, V_LEVEL);
MyMessage maxzmsg(CHILD_ID_MAXZ, V_LEVEL);
MMA8452Q accel;
void setup()
{
Serial.begin(115200);
accel.init(SCALE_2G, ODR_800);
gw.begin(NULL, AUTO, true);
// Send the sketch version information to the gateway and Controller
gw.sendSketchInfo("MMA8452", "1.0");
// Register all sensors to gateway (they will be created as child devices)
gw.present(CHILD_ID_BATT, S_POWER);
gw.present(CHILD_ID_MAXX, S_VIBRATION);
gw.present(CHILD_ID_MAXY, S_VIBRATION);
gw.present(CHILD_ID_MAXZ, S_VIBRATION);
}
void loop()
{
countr = 0;
float peakToPeak0 = 0.0; // peak-to-peak level
float peakToPeak1 = 0.0; // peak-to-peak level
float peakToPeak2 = 0.0; // peak-to-peak level
float signalMax0 = -100.0000;
float signalMin0 = 100.0000;
float signalMax1 = -100.0;
float signalMin1 = 100.0;
float signalMax2 = -100.0;
float signalMin2 = 100.0;
while (countr < 20)
{
gw.process();
if (accel.available())
{
accel.read();
delay(2);
double accxx = accel.cx;
double accyy = accel.cy;
double acczz = accel.cz;
//--------------------------------------------------
if (accxx > signalMax0)
{
signalMax0 = accxx; // save just the max levels
}
if (accxx < signalMin0)
{
signalMin0 = accxx; // save just the min levels
}
//--------------------------------------------------
if (accyy > signalMax1)
{
signalMax1 = accyy; // save just the max levels
}
if (accyy < signalMin1)
{
signalMin1 = accyy; // save just the min levels
}
//-------------------------------------------------
if (acczz > signalMax2)
{
signalMax2 = acczz; // save just the max levels
}
if (acczz < signalMin2)
{
signalMin2 = acczz; // save just the min levels
}
countr = countr + 1;
}
}
//------------------------------------------------------
peakToPeak0 = signalMax0 - signalMin0;
peakToPeak1 = signalMax1 - signalMin1;
peakToPeak2 = signalMax2 - signalMin2;
//-----------------------------------------------------
//------------------------------------------------------
if (peakToPeak0 > peakMax0)
{
peakMax0 = peakToPeak0; // save just the max levels
}
if (peakToPeak1 > peakMax1)
{
peakMax1 = peakToPeak1; // save just the max levels
}
if (peakToPeak2 > peakMax2)
{
peakMax2 = peakToPeak2; // save just the max levels
}
//-----------------------------------------------------
if (millis() > startMillis)
{
float v = vcc.Read_Volts();
gw.send(battmsg.set(v,2));
gw.send(maxxmsg.set(peakMax0,4));
gw.send(maxymsg.set(peakMax1,4));
gw.send(maxzmsg.set(peakMax2,4));
peakMax0 = -1.0;
peakMax1 = -1.0;
peakMax2 = -1.0;
startMillis= millis() + 15000;
}
}
Improvements and suggestions are welcome.
regards
Thomas
