scc.h for honeywell HSC pressure sensor

Other Hardware Sensors
1

Hi all,
I am trying to use the SSC library to connect an HSC pressure sensor with no success.
the sensor is an I2C with the address 0x28.
I connected the HSC as in the datasheet (Ground, Vin, SDA and SCL to pins 1,2,3 and 4) and fixed the address in the example code (GitHub - gcargile/arduino-ssc: Automatically exported from code.google.com/p/arduino-ssc)
in the SSC definition it shows a power pin 8 and I could not find what it is
"SSC ssc(0x28, 8)"
any ideas?
Thanks,
Oren

2

Circuit diagram ?

3

I use ardui o ino.
Circuit is:.
Pin 1 goes to ground
Pin 2 goes to 3.3v
Pin 3 goes to SDA in the arduino
Pin 4 goes to SCL
Nothing more is connected to the board and i use the example as it is (except for the i2c address)

4

Have you run the I2C to see if your device is detected on the I2C buss?

5

Yes.
Other sensors work on the same arduino

6

What sensor, a link to the datasheet would be wonderful.

A look at you code in code tags would be nice.

A schematic would be swell!

7

Idahowalker, Thanks for the directions.

item number is HSCDANN001BA2A3
can be shown at:

main specs are:
High Accuracy, Compensated/Amplified, DIP (Dual Inline Pin), Single axial barbed port,
Dry gases only, no diagnostics, 0 bar to 1 bar, I2C, Address 0x28,
10% to 90% of V supply (analog), 214 counts (digital), 3.3 Vdc

datasheet can be found here:

the example code is:
#include <Wire.h>
#include <SSC.h>

// create an SSC sensor with I2C address 0x28 and power pin 8.
SSC ssc(0x28, 8);

void setup()
{
Serial.begin(115200);
Wire.begin();

// set min / max reading and pressure, see datasheet for the values for your
// sensor
ssc.setMinRaw(0);
ssc.setMaxRaw(16383);
ssc.setMinPressure(0.0);
ssc.setMaxPressure(1.6);

// start the sensor
Serial.print("start()\t\t");
Serial.println(ssc.start());
}

void loop()
{
// update pressure / temperature
Serial.print("update()\t");
Serial.println(ssc.update());

// print pressure
Serial.print("pressure()\t");
Serial.println(ssc.pressure());

// print temperature
Serial.print("temperature()\t");
Serial.println(ssc.temperature());

while(1) {
// use Serial as a command stream
while(Serial.available()) {
ssc.commandRequest(Serial);
}
delay(100);
}
}

and schematic

Untitled.png
Untitled.png535×548 240 KB

8

Code tags make you code show up like this:

#include <Wire.h>
#include <SSC.h>

//  create an SSC sensor with I2C address 0x28 and power pin 8.
SSC ssc(0x28, ;

void setup() 
{
  Serial.begin(115200);
  Wire.begin();
 
  //  set min / max reading and pressure, see datasheet for the values for your 
  //  sensor
  ssc.setMinRaw(0);
  ssc.setMaxRaw(16383);
  ssc.setMinPressure(0.0);
  ssc.setMaxPressure(1.6);
 
  //  start the sensor
  Serial.print("start()\t\t");
  Serial.println(ssc.start());
} 

void loop() 
{
  //  update pressure / temperature
  Serial.print("update()\t");
  Serial.println(ssc.update());
  
  // print pressure
  Serial.print("pressure()\t");
  Serial.println(ssc.pressure());
  
  // print temperature
  Serial.print("temperature()\t");
  Serial.println(ssc.temperature());

  while(1) {
    // use Serial as a command stream
    while(Serial.available()) {
      ssc.commandRequest(Serial);
    } 
    delay(100);
  }
}

Helps with readability and copying to my Arduino IDE as well as nicely delineates code from other cht.

I notice there lines of code

/  start the sensor
  Serial.print("start()\t\t");
  Serial.println(ssc.start());

What message do you get?

I notice that the device is a 3.3V device connected to a 5V device, could be a problem.

Next, do an internet search, using your favorite search engine, on the words "connecting arduino uno to i2c" to see how other connected the Arduino Uno and the I2C buss.

9

Thanks very much for the reply.
I am now on a 5 days vacation.
I will update when i return. :slight_smile: