Uno wifi rev2 i2c trying to run bmp180 and mcp3424

Using Arduino Networking, Protocols, and Devices
1

hi all. im new here. also comparatively i am a newbie. recently i have tried to add thermocouples to an existing project using an mcp3424. i have bashed and smashed my way through several libraries on git hub and finally got one to work (the one form u chip ) measuring all four channels and printing temperatures correctly. when using the other libraries weird stuff would happen eg. commenting out a serial print line returned crazy results.
another library designed to read all four channels of the mcp3424 was just a fantastic random number generator no matter the configuration.
i figure there must be some low level timing issue that i don't currently have the brain resources to understand or fix.
now though, as i have some code that delivers, when i try to add the bmp180 air pressure module(adafruit libraries)i again get crazy results. for the air pressures i get sub sea pressures and for the temps i get hot coffee temps. neither of which are correct. if i take either sensor away i get coerrect results. the address for the mcp3424 is set to 0x6E and the bmp 180 is 0x77
i tried running the i2c speed test and it found both addresses plus the one for the crypto locker and another mcp3424 that is not being read yet.
by themselves i can get both modules to work perfectly but together, not so.
if i try to run the bmp test code with everytihng connected the output say it cant find a valid sensor however when i disconnect the mcp3424 it springs to life. as i reconnect either the clock or data line the results go mental.
. i am still thinking it is a timing, speed or bit alignment issue- not reading the bit or byte i think i am etc.
hope someone out there with a touch of the clevers can maybe point me in a direction of where to start looking.

cheers
p.s sorry but i cant seem to find the code blocks button mentioned on other posts. to post my code and i tried to cut and paste code but an error came up saying that i couldnt post more than two links (??)

[code]
#include <SoftwareSerial.h>
#include <Picaso_Const4D.h>
#include <Picaso_Serial_4DLib.h>
#include <genieArduino.h>
#include <Arduino_LSM6DS3.h>
#include <Wire.h>
#include <MCP342X.h>
#include <Adafruit_BMP085.h>
#include <idDHTLib.h>


#define rightport 0
#define leftport 1
#define fuelsender 2
int idDHTLibPin = 3; //Digital pin for comunications



unsigned long runtime;
unsigned long deehttimer;
const int smoothsize = 150;
int rightmanraw;
int leftmanraw;
int avmanraw;
int airpressure;
int airtemp;//for pressure
int wetness;
int dewpoint;
int eyretemp;//for cloud stuff
int qnh;
int qfe;
int mslp;
int altitude;
int cloudbase;

int sensedat[400][4];
int twun, ttwo, tthree, tfour;


int i = 0;
int a = 0;
int RC;
int rv[smoothsize];
int lv[smoothsize];
int readindex = 0;
int ltotal = 0;
int rtotal = 0;
int lav;
int rav;
int address=0;
long junkint = 0;
long Voltage[4];//for egt
long timestart;
int form;
bool acknowledge = 0;

bool deebug=0;
//map(Voltage,

idDHTLib DHTLib(idDHTLibPin, idDHTLib::DHT22);
Adafruit_BMP085 bmp;
// Instantiate objects used in this project
MCP342X myADC;


Genie genie;
SoftwareSerial mySerial(8, 9);


void setup() {
  Serial.begin(9600);
  mySerial.begin(9600);
  Wire.begin();
  while (!Serial) {
    delay(300); //needs notification for no serial
  }
  Serial.println(myADC.testConnection() ? "MCP342X connection successful" : "MCP342X connection failed");
  if (!bmp.begin());
  {
    Serial.println("Could not find a valid air pressure sensor, check wiring!");//change to genie output


  }
  myADC.configure( MCP342X_MODE_ONESHOT |
                   MCP342X_CHANNEL_1 |
                   MCP342X_SIZE_14BIT |
                   MCP342X_GAIN_8X);
  junkint = (myADC.getConfigRegShdw(), HEX);
  runtime = millis();
  deehttimer = millis();


}


void loop()
{
  Serial.print("in the loop");

  { a++;
    
    MET();
    /
    TEMPS();
    /* genie.WriteObject(GENIE_OBJ_GAUGE,9,rightmanraw);
      //leftvalue = analogRead(leftmanraw);
      genie.WriteObject(GENIE_OBJ_GAUGE,10,leftmanraw);
      genie.WriteObject(GENIE_OBJ_LED_DIGITS,12,airtemp);
      genie.WriteStr(0,leftmanraw);
      genie.WriteStr(5,rightmanraw);
       genie.WriteObject(GENIE_OBJ_LED_DIGITS,11,airpressure);
      genie.WriteObject(GENIE_OBJ_LED_DIGITS,13,wetness);
      genie.WriteObject(GENIE_OBJ_LED_DIGITS,14,dewpoint);
      genie.WriteObject(GENIE_OBJ_LED_DIGITS,15,cloudbase);
      genie.WriteObject(GENIE_OBJ_THERMOMETER,0,(eyretemp+5));//+5 is to allow for -5 on thermmeter scale
      genie.WriteObject(GENIE_OBJ_LED_DIGITS,16,eyretemp);
      genie.WriteObject(GENIE_OBJ_COOL_GAUGE,1,avmanraw);*/
    if (a = 473) {
      checkstuff();
    }

  }
}
void MET()
{
  if (a = 473) {
    checkstuff();
  }
  airtemp = (bmp.readTemperature());
  airpressure = ((bmp.readPressure())/10);
  altitude = ((bmp.readAltitude(1013)*3.28084));
  mslp = (bmp.readSealevelPressure());
  dewpoint = (DHTLib.getDewPoint());
  eyretemp = (DHTLib.getCelsius());
  wetness = (DHTLib.getHumidity());
  a++;
  if (deebug=true)
  {
    Serial.println("in MET now");
    Serial.println(airtemp);
    Serial.println(airpressure);
    Serial.println(altitude);
    Serial.println(mslp);
    Serial.println(dewpoint);
    Serial.println(eyretemp);
    Serial.println(wetness); 
}
}


void TEMPS()
{
  Serial.print("in temps");

  {//channel1

  myADC.configure( MCP342X_MODE_ONESHOT |
                   MCP342X_CHANNEL_1 |
                   MCP342X_SIZE_14BIT |
                   MCP342X_GAIN_8X);

  //Serial.println(myADC.getConfigRegShdw(), HEX);
  static int16_t  result;

  myADC.startConversion();
  delay(1);
  myADC.getResult(&result);
  Serial.print("cahnnel1 :");
  Serial.println(((result * 31.25) / 40) + airtemp);
}

{
  //channel2

  myADC.configure( MCP342X_MODE_ONESHOT |
                   MCP342X_CHANNEL_2 |
                   MCP342X_SIZE_14BIT |
                   MCP342X_GAIN_8X);

  //Serial.println(myADC.getConfigRegShdw(), HEX);
  static int16_t  result;

  myADC.startConversion();
  delay(1);
  myADC.getResult(&result);

  Serial.print("cahnnel2 :");
  Serial.println(((result * 31.25) / 40) + airtemp);
}
{
  //channel3

  myADC.configure( MCP342X_MODE_ONESHOT |
                   MCP342X_CHANNEL_3 |
                   MCP342X_SIZE_14BIT |
                   MCP342X_GAIN_8X);

  //Serial.println(myADC.getConfigRegShdw(), HEX);
  static int16_t  result;

  myADC.startConversion();
  delay(1);
  myADC.getResult(&result);

  Serial.print("cahnnel3 :");
  Serial.println(((result * 31.25) / 40) + airtemp);
}
{
  //channel4

  myADC.configure( MCP342X_MODE_ONESHOT |
                   MCP342X_CHANNEL_4 |
                   MCP342X_SIZE_14BIT |
                   MCP342X_GAIN_8X);

  // Serial.println(myADC.getConfigRegShdw(), HEX);
  static int16_t  result;

  myADC.startConversion();
  delay(1);
  myADC.getResult(&result);

  Serial.print("cahnnel4 :");
  Serial.println(((result * 31.25) / 40) + airtemp);
  Serial.println();
}





a++;
}

void vibelog ()
{
  if (a = 473)
  {
    checkstuff();
  }

  //read cycle
  for ( RC = 0; RC < 401; RC++)
  {


    leftmanraw = analogRead(leftport);


    {

      float X, Y, Z;

      if (IMU.accelerationAvailable()) {
        IMU.readAcceleration(X, Y, Z);


        sensedat[RC][0] = {X};
        sensedat[RC][1] = {Y};
        sensedat[RC][2] = {leftmanraw};
        sensedat[RC][3] = {millis()};

        Serial.println(sensedat[RC][0]);
        Serial.println(sensedat[RC][1]);
        //Serial.println();
        //Serial.println(i);
        // reset timestart
        timestart = millis();
        //delay(250);
        if (RC >= 400)
          writestuff();



      }
    }
  }
  a++;
}

void writestuff()
{
  if (a = 473)
  {
    checkstuff;
  }

  RC = 0;

  mySerial.begin(9600);
  for (int  i = 0; i < 400; i++)
  {
    Serial.print("writing stuff from inside loop");
    //Write to array including micros(optionally manifold vacuum)
    //array stuff
    Serial1.println();



    for (int b = 0; b < 4; b++) {
      mySerial.write(sensedat [i] [b]);
      mySerial.write(' ');

    }
  }
}

void checkstuff()
{
  //if
}

[/code]
2

Hi, In order to help you we need to see a section of code and the stack trace (results of the errors from the compiler) before we can help you. If you are cutting and pasting between sections of example code, you need to make sure your sections of code are complete.

3

wow thanks for the rapid reply, can you tell me exactly how to post the code and or stack trace?

4

Hi, when entering a new post, click the preformatted text option </> and type your code and or compiler results

5

Also indicate the line of code where the compiler is indicating the error. This will help us debug your
code.

6 
[code]
#include <SoftwareSerial.h>
#include <Picaso_Const4D.h>
#include <Picaso_Serial_4DLib.h>
#include <genieArduino.h>
#include <Arduino_LSM6DS3.h>
#include <Wire.h>
#include <MCP342X.h>
#include <Adafruit_BMP085.h>
#include <idDHTLib.h>


#define rightport 0
#define leftport 1
#define fuelsender 2
int idDHTLibPin = 3; //Digital pin for comunications



unsigned long runtime;
unsigned long deehttimer;
const int smoothsize = 150;
int rightmanraw;
int leftmanraw;
int avmanraw;
int airpressure;
int airtemp;//for pressure
int wetness;
int dewpoint;
int eyretemp;//for cloud stuff
int qnh;
int qfe;
int mslp;
int altitude;
int cloudbase;

int sensedat[400][4];
int twun, ttwo, tthree, tfour;


int i = 0;
int a = 0;
int RC;
int rv[smoothsize];
int lv[smoothsize];
int readindex = 0;
int ltotal = 0;
int rtotal = 0;
int lav;
int rav;
int address=0;
long junkint = 0;
long Voltage[4];//for egt
long timestart;
int form;
bool acknowledge = 0;

bool deebug=0;
//map(Voltage,

idDHTLib DHTLib(idDHTLibPin, idDHTLib::DHT22);
Adafruit_BMP085 bmp;
// Instantiate objects used in this project
MCP342X myADC;


Genie genie;
SoftwareSerial mySerial(8, 9);


void setup() {
  Serial.begin(9600);
  mySerial.begin(9600);
  Wire.begin();
  while (!Serial) {
    delay(300); //needs notification for no serial
  }
  Serial.println(myADC.testConnection() ? "MCP342X connection successful" : "MCP342X connection failed");
  if (!bmp.begin());
  {
    Serial.println("Could not find a valid air pressure sensor, check wiring!");//change to genie output


  }
  myADC.configure( MCP342X_MODE_ONESHOT |
                   MCP342X_CHANNEL_1 |
                   MCP342X_SIZE_14BIT |
                   MCP342X_GAIN_8X);
  junkint = (myADC.getConfigRegShdw(), HEX);
  runtime = millis();
  deehttimer = millis();


}


void loop()
{
  Serial.print("in the loop");

  { a++;
    
    MET();
   
    TEMPS();
    /* genie.WriteObject(GENIE_OBJ_GAUGE,9,rightmanraw);
      //leftvalue = analogRead(leftmanraw);
      genie.WriteObject(GENIE_OBJ_GAUGE,10,leftmanraw);
      genie.WriteObject(GENIE_OBJ_LED_DIGITS,12,airtemp);
      genie.WriteStr(0,leftmanraw);
      genie.WriteStr(5,rightmanraw);
       genie.WriteObject(GENIE_OBJ_LED_DIGITS,11,airpressure);
      genie.WriteObject(GENIE_OBJ_LED_DIGITS,13,wetness);
      genie.WriteObject(GENIE_OBJ_LED_DIGITS,14,dewpoint);
      genie.WriteObject(GENIE_OBJ_LED_DIGITS,15,cloudbase);
      genie.WriteObject(GENIE_OBJ_THERMOMETER,0,(eyretemp+5));//+5 is to allow for -5 on thermmeter scale
      genie.WriteObject(GENIE_OBJ_LED_DIGITS,16,eyretemp);
      genie.WriteObject(GENIE_OBJ_COOL_GAUGE,1,avmanraw);*/
    if (a = 473) {
      checkstuff();
    }

  }
}
void MET()
{
  if (a = 473) {
    checkstuff();
  }
  airtemp = (bmp.readTemperature());
  airpressure = ((bmp.readPressure())/10);
  altitude = ((bmp.readAltitude(1013)*3.28084));
  mslp = (bmp.readSealevelPressure());
  dewpoint = (DHTLib.getDewPoint());
  eyretemp = (DHTLib.getCelsius());
  wetness = (DHTLib.getHumidity());
  a++;
  if (deebug=true)
  {
    Serial.println("in MET now");
    Serial.println(airtemp);
    Serial.println(airpressure);
    Serial.println(altitude);
    Serial.println(mslp);
    Serial.println(dewpoint);
    Serial.println(eyretemp);
    Serial.println(wetness); 
}
}


void TEMPS()
{
  Serial.print("in temps");

  {//channel1

  myADC.configure( MCP342X_MODE_ONESHOT |
                   MCP342X_CHANNEL_1 |
                   MCP342X_SIZE_14BIT |
                   MCP342X_GAIN_8X);

  //Serial.println(myADC.getConfigRegShdw(), HEX);
  static int16_t  result;

  myADC.startConversion();
  delay(1);
  myADC.getResult(&result);
  Serial.print("cahnnel1 :");
  Serial.println(((result * 31.25) / 40) + airtemp);
}

{
  //channel2

  myADC.configure( MCP342X_MODE_ONESHOT |
                   MCP342X_CHANNEL_2 |
                   MCP342X_SIZE_14BIT |
                   MCP342X_GAIN_8X);

  //Serial.println(myADC.getConfigRegShdw(), HEX);
  static int16_t  result;

  myADC.startConversion();
  delay(1);
  myADC.getResult(&result);

  Serial.print("cahnnel2 :");
  Serial.println(((result * 31.25) / 40) + airtemp);
}
{
  //channel3

  myADC.configure( MCP342X_MODE_ONESHOT |
                   MCP342X_CHANNEL_3 |
                   MCP342X_SIZE_14BIT |
                   MCP342X_GAIN_8X);

  //Serial.println(myADC.getConfigRegShdw(), HEX);
  static int16_t  result;

  myADC.startConversion();
  delay(1);
  myADC.getResult(&result);

  Serial.print("cahnnel3 :");
  Serial.println(((result * 31.25) / 40) + airtemp);
}
{
  //channel4

  myADC.configure( MCP342X_MODE_ONESHOT |
                   MCP342X_CHANNEL_4 |
                   MCP342X_SIZE_14BIT |
                   MCP342X_GAIN_8X);

  // Serial.println(myADC.getConfigRegShdw(), HEX);
  static int16_t  result;

  myADC.startConversion();
  delay(1);
  myADC.getResult(&result);

  Serial.print("cahnnel4 :");
  Serial.println(((result * 31.25) / 40) + airtemp);
  Serial.println();
}





a++;
}

void vibelog ()
{
  if (a = 473)
  {
    checkstuff();
  }

  //read cycle
  for ( RC = 0; RC < 401; RC++)
  {


    leftmanraw = analogRead(leftport);


    {

      float X, Y, Z;

      if (IMU.accelerationAvailable()) {
        IMU.readAcceleration(X, Y, Z);


        sensedat[RC][0] = {X};
        sensedat[RC][1] = {Y};
        sensedat[RC][2] = {leftmanraw};
        sensedat[RC][3] = {millis()};

        Serial.println(sensedat[RC][0]);
        Serial.println(sensedat[RC][1]);
        //Serial.println();
        //Serial.println(i);
        // reset timestart
        timestart = millis();
        //delay(250);
        if (RC >= 400)
          writestuff();



      }
    }
  }
  a++;
}

void writestuff()
{
  if (a = 473)
  {
    checkstuff;
  }

  RC = 0;

  mySerial.begin(9600);
  for (int  i = 0; i < 400; i++)
  {
    Serial.print("writing stuff from inside loop");
    //Write to array including micros(optionally manifold vacuum)
    //array stuff
    Serial1.println();



    for (int b = 0; b < 4; b++) {
      mySerial.write(sensedat [i] [b]);
      mySerial.write(' ');

    }
  }
}

void checkstuff()
{
  //if
}

[/code]
7

found it :slight_smile:
there is no error with compiling.

8

Great news, good luck with your project

9

hmmmm i thin you misunderstand the problem
there is no issue with the compiling but the original issues stilll stand.

10

interupt issue maybe

11

sorry, what i found was the button to post code, not the solution to the problem

12

Split the modules out to separate sketches. One for each sensor. Try getting them to work by themselves. Then when both are working you can more easily see if there is a conflict between either sensor data or pin configuration.

13

yep done that

14

as above individually everything works. but together it doesn't. the bmp part of the code works when the mcp is disconected and vice a versa

15

This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.