Particle AMS5812_0050-D-B Pressure & Temperature Sensor Tutorial

AMS5812 Amplified Pressure Sensor with Analog and Digital Outputs is a high precision sensor with an analog voltage output and digital I2C interface. It combines a piezoresistive sensing element with a signal conditioning element for its operation. Here is the demonstration of using it with particle photon.

1. Particle Photon

2. AMS5812_0050-D-B

3. I²C Cable

4. I²C Shield for Particle Photon

Take an I2C shield for particle photon and gently push it over the pins of particle photon.

Then connect the one end of I2C cable to AMS5812_0050-D-B sensor and the other end to the I2C shield.

Connections are shown in the picture above.

The particle code for AMS5812_0050-D-B can be downloaded from our GitHub repository- Dcube Store

Here is the link for the same :

https://github.com/DcubeTechVentures/AMS5812-0050-D-B

We have used two libraries for particle code, which are application.h and spark_wiring_i2c.h. Spark_wiring_i2c library is required to facilitate the I2C communication with the sensor.

You can also copy the code from here, it is given as follows:

// 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.

// AMS5812

// This code is designed to work with the AMS5812_I2CS_0050-D-B I2C Mini Module available in Dcube Store.

#include

#include

// AMS5812 I2C address is 0x78(120)

#define Addr 0x78

float pressure = 0.0, cTemp = 0.0, fTemp = 0.0;

unsigned long ptemp, temp;

void setup()

{

//Set variable

Particle.variable("i2cdevice","AMS5812");

Particle.variable("pressure",pressure);

Particle.variable("cTemp",cTemp);

// Initialise I2C communication

Wire.begin();

// Initialise SerialSerial.begin(9600);

delay(300);

}

void loop()

{

byte data[4];

// Request 4 bytes of data from slave device

Wire.requestFrom(Addr,4);

// Read 4 bytes of data

// pressure msb, pressure lsb, temp msb, temp lsb

if(Wire.available() == 4)

{

data[0] = Wire.read();

data[1] = Wire.read();

data[2] = Wire.read();

data[3] = Wire.read();

}

delay(300);

// Convert the data

ptemp = ((data[0] & 0xFF) * 256 + (data[1] & 0xFF));

temp = ((data[2] & 0xFF) * 256 + (data[3] & 0xFF));

pressure = ((ptemp - 3277.0) / ((26214.0) / 10.0)) - 5.0;

cTemp = ((temp - 3277.0) / ((26214.0) / 110.0)) - 25.0;

fTemp = (cTemp * 1.8 ) + 32;

// Output data to dashboard

Particle.publish("Temperature in Celsius :", String(cTemp));

delay(500);

Particle.publish("Temperature in Fahrenheit : ", String(fTemp));

delay(500);

Particle.publish("Pressure in PSI: ", String(pressure));delay(500);

}

AMS5812 is an amplified pressure sensor and it can be employed in systems where static and dynamic pressure measurement and barometric pressure measurement is to be carried out. It plays a pivotal role in Vacuum monitoring,Gas flow monitoring, Fluid level measurement as well as Medical instrumentation.