I use photon Argon anche I need to connect five of this sensor with Grove I2c 6 port https://www.kiwi-electronics.nl/nl/grov ... ugQAvD_BwE .
I have a problem with the i2C address of the sensor when I connect more than one sensors together.. How can I solve and read the measures from all the sensor at the same time?
Thanks a lot !
this code for a single sensor works:
Code: Select all
// Distributed with a free-will license.
// Use it any way you want, profit or free, provided it fits in the licenses of its associated works.
// MLX90393
// This code is designed to work with the MLX90393_I2CS I2C Mini Module available from ControlEverything.com.
// https://www.controleverything.com/products
#include <math.h>
// MLX90393 I2C Address is 0x0C(12)
#define Addr 0x0C
int xMag = 0, yMag = 0, zMag = 0;
int MagInt = 0;
void setup()
{
// Set variable
Particle.variable("i2cdevice", "MLX90393");
Particle.variable("xMag", xMag);
Particle.variable("yMag", yMag);
Particle.variable("zMag", zMag);
// Initialise I2C communication as MASTER
Wire.begin();
// Initialise serial communication, set baud rate = 9600
Serial.begin(9600);
// Start I2C Transmission
Wire.beginTransmission(Addr);
// Select Write register command
Wire.write(0x60);
// Set AH = 0x00, BIST disabled
Wire.write(0x00);
// Set AL = 0x5C, Hall plate spinning rate = DEFAULT, GAIN_SEL = 5
Wire.write(0x5C);
// Select address register, (0x00 << 2)
Wire.write(0x00);
// Stop I2C Transmission
Wire.endTransmission();
// Request 1 byte of data
Wire.requestFrom(Addr, 1);
// Read status byte
if (Wire.available() == 1)
{
unsigned int c = Wire.read();
}
// Start I2C Transmission
Wire.beginTransmission(Addr);
// Select Write register command
Wire.write(0x60);
// Set AH = 0x02
Wire.write(0x02);
// Set AL = 0xB4, RES for magnetic measurement = 0
Wire.write(0xB4);
// Select address register, (0x02 << 2)
Wire.write(0x08);
// Stop I2C Transmission
Wire.endTransmission();
// Request 1 byte of data
Wire.requestFrom(Addr, 1);
// Read status byte
if (Wire.available() == 1)
{
unsigned int c = Wire.read();
}
delay(300);
}
void loop()
{
unsigned int data[7];
// Start I2C Transmission
Wire.beginTransmission(Addr);
// Start single meaurement mode, ZYX enabled
Wire.write(0x3E);
// Stop I2C Transmission
Wire.endTransmission();
// Request 1 byte of data
Wire.requestFrom(Addr, 1);
// Read status byte
if (Wire.available() == 1)
{
unsigned int c = Wire.read();
}
delay(100);
// Start I2C Transmission
Wire.beginTransmission(Addr);
// Send read measurement command, ZYX enabled
Wire.write(0x4E);
// Stop I2C Transmission
Wire.endTransmission();
// Request 7 bytes of data
Wire.requestFrom(Addr, 7);
// Read 7 bytes of data
// status, xMag msb, xMag lsb, yMag msb, yMag lsb, zMag msb, zMag lsb
if (Wire.available() == 7);
{
data[0] = Wire.read();
data[1] = Wire.read();
data[2] = Wire.read();
data[3] = Wire.read();
data[4] = Wire.read();
data[5] = Wire.read();
data[6] = Wire.read();
}
// Convert the data
xMag = data[1] * 256 + data[2];
if (xMag > 32767)
{
xMag -= 65536;
}
yMag = data[3] * 256 + data[4];
if (yMag > 32767)
{
yMag -= 65536;
}
zMag = data[5] * 256 + data[6];
if (zMag > 32767)
{
zMag -= 65536;
}
MagInt = sqrt(xMag*xMag + yMag*yMag + zMag*zMag);
Particle.publish("Magnetic Field in X-Axis : ", String(xMag));
Particle.publish("Magnetic Field in Y-Axis : ", String(yMag));
Particle.publish("Magnetic Field in Z-Axis : ", String(zMag));
delay(1000);
Particle.publish("Magnetic field Intensity: ", String(MagInt));
delay(1000);
}
