Latest posts for the topic "Arduino and Mango Step by step working example"

Arduino and Mango Step by step working example

JointTech — GMT

1. Buy or make a Arduino

2. Download the latest Arduino software I'm using 0020. http://arduino.cc/en/Main/Software

3. If you are using Arduino Duemilanove or a similar board that runs off USB you’ll have to install the USB drivers. You can find them in the Arduino folder you just downloaded.

4. plug in a TMP36 temp sensor as shown here: http://tinyurl.com/plbx38
Plug it into Analog port 3 instead of 0 as shown in the link.

5. Grab the modbus library from http://www.tucsni.nl/jee/ModbusSlave.zip
you should check his site http://www.tucsni.nl/jee/ he actually says to use the new version here: http://sites.google.com/site/jpmzometa/arduino-mbrt/arduino-modbus-slave
but I havent tested it.

6. Unzip modbusslave.zip to your_arduino_install\libraries\ModBusSlave

7. open the arduino IDE

8. Paste the following code:
[code]#include

//TMP36 Pin Variables
int temperaturePin = 3; //the analog pin the TMP36's Vout (sense) pin is connected to
//the resolution is 10 mV / degree centigrade
//(500 mV offset) to make negative temperatures an option
int temptest = 1 ;
//Arduino sketch example with 2 holding regs:
void setup()
{
/* Modbus setup example, the master must use the same COM parameters */
/* 115200 bps, 8N1, two-device network */
// regs[MB_REG0]=153;
// regs[MB_REG1]=456;

init_mb_slave(115200, 'n', 0);
}

void loop()
{
/* This is all for the Modbus slave */
start_mb_slave(MB_SLAVE, regs, MB_REGS);

/* your code goes here */
float temperature = getVoltage(temperaturePin); //getting the voltage reading from the temperature sensor
temperature = (((temperature - .5) * 100)*1.8) + 32; //converting from 10 mv per degree wit 500 mV offset
//to degrees ((volatge - 500mV) times 100)
// Serial.println(temperature);
// Serial.println(regs[MB_REG0]); //printing the result
// delay(100);
temptest = (temperature);
regs[MB_REG0]=temptest;

/* handle write event */
if (written.num_regs) {
/// ....
written.num_regs=0;
}
}

/*
* getVoltage() - returns the voltage on the analog input defined by
* pin
*/
float getVoltage(int pin){
return (analogRead(pin) * .004882814); //converting from a 0 to 1024 digital range
// to 0 to 5 volts (each 1 reading equals ~ 5 millivolts
}
[/code]

9. upload the code to your Arduino.

10. Install Mango

11. Create a new data source.
[url=http://postimage.org/image/1kmj3h7pg/][img]http://s1.postimage.org/rTUni.jpg[/img][/url]

12. Create a new datapoint
[url=http://postimage.org/image/1syvr8io4/][img]http://s3.postimage.org/v_Lji.jpg[/img][/url]

13. you should now be seeing the current temperature updating every 5 seconds on your datapoint.
You can breathe hard on your tmp36 to see the temp go up in mango.

have fun.
hope this helps somebody as it took me about 2 days of scouring the net to make it finally work.

Re:Arduino and Mango Step by step working example

mlohbihler — GMT

Nice. Thanks.

Re:Arduino and Mango Step by step working example

jose francisco — GMT

Hello.

I'm trying to compile the sketch buy i get an error in "init_mb_slave(...)" not declared function.

I think that the library i've got is newer because in new examples the configuration is done in this way:

mbs.configure(SLAVE,BAUD,PARITY,TXENPIN);

Can you comment this issue?
thanks

Re:Arduino and Mango Step by step working example

JointTech — GMT

I would use the library here: http://www.tucsni.nl/jee/ModbusSlave.zip
other than that I have no idea. probably question better for the arduino forums as well.

Re:Arduino and Mango Step by step working example

jose francisco — GMT

Sketch for new library from http://sites.google.com/site/jpmzometa/arduino-mbrt/arduino-modbus-slave

With this code you can:
-See the status of pin 2 in mango (MB_REG0)
-set the status of pin 13 with mango (MB_CTRL)

use offset 0,1,... in mango to use MB_REG0, MB_CTRL, MB_TIME,...

[code]

#include

/* First step MBS: create an instance */
ModbusSlave mbs;

/* slave registers */
enum {
MB_REG0,
MB_CTRL, /* Led control on, off or blink */
MB_TIME, /* blink time in milliseconds */
MB_CNT, /* count the number of blinks */
MB_REGS /* total number of registers on slave */
};

int asdf=1;
int regs[MB_REGS];
int ledPin = 13;

void setup()
{

/* the Modbus slave configuration parameters */
const unsigned char SLAVE = 1;
const long BAUD = 9600;
const char PARITY = 'n';
const char TXENPIN = 1;

/* Second step MBS: configure */
mbs.configure(SLAVE,BAUD,PARITY,TXENPIN);

pinMode(ledPin, OUTPUT);
pinMode(2,INPUT);
}

void loop()
{

asdf=digitalRead(2);
regs[MB_REG0]=asdf;

/* Third and las step MBS: update in loop*/
mbs.update(regs, MB_REGS);

if(regs[MB_CTRL]==1)
digitalWrite(ledPin,1);
else
digitalWrite(ledPin,0);

}
[/code]

Re:Arduino and Mango Step by step working example

JointTech — GMT

Nice I was struggling with setting values. Ill have to give this a try.

Re:Arduino and Mango Step by step working example

relristein — GMT

Hi,

I have a one question. I use the modbus serial for comunication. It is script:

#include
/* First step MBS: create an instance */
ModbusSlave mbs;
/* slave registers */
enum {

MB_CTRL, /* Led control on, off or blink */
MB_TIME, /* blink time in milliseconds */
MB_CNT, /* count the number of blinks */
MB_REGS /* total number of registers on slave */

};

int regs[MB_REGS];
int ledPin = 13;

void setup()
{

/* the Modbus slave configuration parameters */
const unsigned char SLAVE = 1;
const long BAUD = 9600;
const char PARITY = 'n';
const char TXENPIN = 1;
/* Second step MBS: configure */
mbs.configure(SLAVE,BAUD,PARITY,TXENPIN);
pinMode(ledPin, OUTPUT);

}

void loop()

{

/* Third and las step MBS: update in loop*/

mbs.update(regs, MB_REGS);

if(regs[MB_CTRL]==1)

{

digitalWrite(ledPin,1);

}

else{

digitalWrite(ledPin,0);

}

}

********************
But i want a blink effect in led and i modified the script:

if(regs[MB_CTRL]==1)
{
digitalWrite(ledPin,1);
delay(3000);
digitalWrite(ledPin,0);
delay(3000);
}
else{
digitalWrite(ledPin,0);
}
}

Well, when i set the bit 1, the led blink but it don't enter in the else.

Anyone had the same problem with supervisory and script?

tank's

*sorry, my english is very weak.