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1  Using Arduino / Displays / Re: MENWIZ: yet another character lcd menu wizard library on: January 21, 2013, 08:02:39 pm
I had this same problem and found that my copy of the menwiz.h library was different on the other computer. I usually copy my files onto a usb drive to move them between computers. I somehow managed to get a copy that did not have the #define BUTTON_SUPPORT line commented out. So if you don't have #include <buttons.h> in your sketch and the menwiz.h calls for it you get the error.
2  Using Arduino / Programming Questions / Re: Please help with array issues on: January 15, 2013, 10:04:40 pm
i am kind of new to this, but I think you are only specifying 1 voltage and 1 current with this:
int lcd_disp[16][3] = {0};
double volts;
double current;

I believe that you also have to create an array for volts and current. I think you also need to set up a loop to read and and store the variables. Something like this:
#define SENSORS 5 // number of sensors in loop
float degreesF[SENSORS];
byte Sensor[SENSORS][8]; // creates byte var. array called Sensor[from zero to #SENSORS][8 bytes long]

void setup()
for (int i = 0; i < SENSORS; i++)
    degreesF[i] = sensors.getTempF(Sensor[i]);

Loop will also work to display results. It looks like you are reading the address and then using a switch to decide which results to display. Then incrementing the max9611 addr and starting over. I think the loop is more efficient unless you have something where you can pick a specific address

lcd.print(max9611_addr<<1,HEX); //print address
switch (max9611_addr) {
        case 0x70:
          lcd_disp[0][0] = max9611_addr;
          lcd_disp[0][1] = current;
          lcd_disp[0][2] = volts;
        case 0x71:

3  Using Arduino / Displays / Re: MENWIZ: yet another character lcd menu wizard library on: January 10, 2013, 04:08:44 pm
I'll have to get back to this. I melted my new I2C display due to a wiring mistake. Another learning opportunity.
4  Using Arduino / Programming Questions / Re: Communication with 2 x DS18B20 on: January 09, 2013, 09:42:01 pm
I have a hacked version of one of the Dallas_Temperature_Control library examples that searches for your sensors, displays the device count, addresses and temps in degC and degF and probably some other stuff. You will have to modify this if using 2 pins for the sensors.

I also have a hacked version that allows manual entry of the addresses and the ability to return temps by index instead of address if you are interested. I use this method, partly because I was struggling with the address method and attempting to input the results in an array.

/* Modification of the Dallas Temperature Multiple Example to auto search all devices and report addresses and temps.
  Date 12/18/2012
#include <OneWire.h>
#include <DallasTemperature.h>

// Data wire is plugged into port 2 on the Arduino
#define ONE_WIRE_BUS 2

// Temp Sensor setup
#define DS1820_SENSORS 5 // number of sensors in loop
byte Temp[DS1820_SENSORS][8]; // creates byte var. array called Temp[0-DS1820_SENSORS][8 bytes long]

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);

// arrays to hold device addresses
DeviceAddress temp[DS1820_SENSORS]; // stores addresses in uint8_t format

// Define variables to store temps for each sensor
float tempC[DS1820_SENSORS];
float tempF[DS1820_SENSORS];
float degreesF[DS1820_SENSORS];

void setup(void)
  // start serial port
  Serial.println("Dallas Temperature IC Control Library Demo");

  // Start up the library

  // locate devices on the bus
  Serial.print("Locating devices...");
  Serial.print("Found ");
  Serial.print(sensors.getDeviceCount(), DEC);
  Serial.println(" devices.");

  // report parasite power requirements
  Serial.print("Parasite power is: ");
  if (sensors.isParasitePowerMode()) Serial.println("ON");
  else Serial.println("OFF");

  // search for devices on the bus and assign based on an index.
  // method  search() looks for the next device. Returns 1 if a new address has been
  // returned. A zero might mean that the bus is shorted, there are no devices,
  // or you have already retrieved all of them. The order is
  // deterministic. You will always get the same devices in the same order
  // Must be called before search()
  byte sensor;
  byte present = 0;
  byte data[12];
  for (sensor=0;sensor<DS1820_SENSORS;sensor++) {
  if (!sensors.getAddress(Temp[sensor], sensor)) Serial.println("Unable to find address for Device");   

// function to print a device address
void printAddress(DeviceAddress deviceAddress)
  for (uint8_t i = 0; i < 8; i++)
  // zero pad the address if necessary
  if (deviceAddress[i] < 16) Serial.print("0");
  Serial.print(deviceAddress[i], HEX);

// function to print a device's resolution
void printResolution(DeviceAddress deviceAddress)
  Serial.print("Resolution: ");

void loop(void)

  // loop to print temps
  sensors.requestTemperatures(); // Send the command to get temperatures
  for( int j =0; j < DS1820_SENSORS; j++){
  printTemperature(Temp[j]); // Use a simple function to print out the data
// main function to print information about a device
void printData(DeviceAddress deviceAddress)
  Serial.print("Device Address: ");
  Serial.print(" ");

void printTemperature(DeviceAddress deviceAddress) // function to print the temperature for a device
  int i;
  tempC[i] = sensors.getTempC(deviceAddress);
  tempF[i] = (DallasTemperature::toFahrenheit(tempC[i])); // Converts tempC to Fahrenheit
  degreesF[i] = tempF[i]; // copies value so PID can read
  Serial.print("Temperature: ");
  Serial.println(" degrees F"); 
  delay (1000);

5  Using Arduino / Displays / Re: How to use only only 3 or 5 buttons using "back" menu entry on: January 09, 2013, 09:19:05 pm
Due to my complete ignorance it took me a while to figure this 3 or 5 button thing out completely. But that is part of the learning process is trying to figure out where my mistakes are.

I have it compiled but not tested. Program is at 30.7k and I have to get my double PID data converted to float for menwiz.h and then converted back to float for the PID_V1.h.

One question I have: does the new "BACK" menu option need to be in each terminal node?

OK, make it 2 questions: Can it be a menu.addItem instead of menu.addMenu? I'll find out in testing for sure.

s2=menu.addMenu(MW_VAR,s1,F("Back"));     //add a terminal node (that is "variable");
          s2->addVar(MW_ACTION,&bte);                    //create a variable of type "action"
          s2->setBehaviour(MW_ACTION_CONFIRM,false);         // you don't need action confirmation to emulate Escape button!!!
6  Using Arduino / Displays / Re: How to use only only 3 or 5 buttons using "back" menu entry on: January 06, 2013, 08:27:56 pm
for all people interested in "odd" button models (that is 3 or 5 button models) I give you a *very simple* patch to implement it now. The next version will consolidate the change.

Inside the library is implemented a "logical level" where are defined all actions performed  after a button push.
Those functions are private members of class menwiz,  so it is necessary to make just one  change to the MENWIZ.h file, moving  the  definition of actBTE() from private to public. That is all.

In your sketch you can implement a menu entry acting exactly as the escape button as following (example):

void bte(){

I'm also trying to use a 5 button analog and can't make the above line compile. It does work if I leave this in Private
 void     actBTE();
and use this in Public: with the menu.actBTE commented out. Also BTE needs to be all capitols.
void     BTE();
 /* {

When the menu.actBTE is not commented I get these errors :
C:\arduino-1.0.3\libraries\MENWIZ/MENWIZ.h: In member function 'void menwiz::BTE()':
C:\arduino-1.0.3\libraries\MENWIZ/MENWIZ.h:202: error: 'menu' was not declared in this scope

I don't have my display handy so I can't test the compiled code to see if it works.

I'm no c++ expert so I'm not quite sure what to do with this.
7  Using Arduino / Programming Questions / Re: My project isnt working, its simple.. Help plz on: January 04, 2013, 11:14:59 pm
my first guess would be that the functions defined before the setup() should probably be in at the end of the loop().
8  Using Arduino / Programming Questions / Re: MenWIZ using double instead of float on: January 04, 2013, 09:07:34 pm
Use casts.

I don't think this is going to work because I have to put the MENWIZ menu structure in setup() so it's a run once thing. If I have dynamic data, such as my room temp that I want to display.

I can see doing this for static double like my PID setpoint.

Slightly stripped down version here:

#include <LiquidCrystal_I2C.h>
#include <MENWIZ.h>
#include <PID_v1.h>
#include <PID_v1.h>
// PID setup
const int numSensors = 4; // 4 temp sensors used with PID
double Input[numSensors]; // Arrays of 4 input and output variables
double Output[numSensors];
double Setpoint[numSensors] = {68, 72, 72, 72};
double kp = 3;
double ki = 5;
double kd = .1;
PID Room0(&Input[0], &Output[0], &Setpoint[0], kp, ki, kd, DIRECT);
PID Room1(&Input[1], &Output[1], &Setpoint[1], kp, ki, kd, DIRECT);
PID Room2(&Input[2], &Output[2], &Setpoint[2], kp, ki, kd, DIRECT);
PID Room3(&Input[3], &Output[3], &Setpoint[3], kp, ki, kd, DIRECT);

// Create global object for menu and lcd
menwiz menu;
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); // Addr, En, Rw, Rs, d4, d5, d6, d7, backlightpin, polarity 4 x 20 LCD

// analog buttons sample
const int buttonPin = A0;             // 6 button switch circuit input connected to analog pin 0
boolean buttonBlock = 0;
boolean buttonAct = 0; // flag 1
boolean stopMenu = 0; // flag 2
byte buttonPressed = 0;  // which button was pressed
byte lastButtonPressed = 0; // prev button pressed
int buttonValue = 0;  // read value from analog port for the 4 navigation pushbuttons
long menuOffTime = 0;  //used for timer
extern byte MW_navbtn;  //needed to run the software key navigation in Menwiz

void setup()
   Serial.println("The Midway Zone Heat Control");

    //++++++++++++++++++++Menu and LCD 
  char b[84];
  _menu *r,*s1,*s2;
 float room0SP = (float) Setpoint[0]; // cast operator

  // initialize the menu object ( 2 x rows x 16 columns LCD)
  menu.addUsrNav(navMenu, 6);
  MW_navbtn=6;  // force 4 or 6 buttons mode for menu navigation -> MW_navbtn=4; or MW_navbtn=6;

  //create the menu tree
  r=menu.addMenu(MW_ROOT,NULL,F("MAIN MENU"));                      //create a root menu at first (required)

  s1=menu.addMenu(MW_SUBMENU,r,F("VIEW ROOM INFO"));
    s2->addItem(MW_LIST,F("SETPOINTS"));                          //create a variable of type "option list"..
        s2->addItem(MW_LIST,F("MASTER BEDROOM"));     //add option to the OPTION LIST
            // s2->addVar(MW_AUTO_FLOAT,Setpoint[0], 65, 75, 1);
void loop()

 // NAVIGATION MANAGEMENT & DRAWING ON LCD. NOT BLOCKING has to be the first in the void loop
  int navMenu() // 
   As soon as a button is pushed the first time flag 1 is set to HIGH and if the buttonnumber is not 0 then a timer is started.
   The menu action then should only be performed once.
   After 2000 msecs the flag will be set to LOW and a new buttonpush can be processed.
   Menu action is blocked for 2000 msec even if the same button is being kept pressed for 2000 msecs by flag2.

  long menublockTime = millis();

  if (buttonAct == 1 && buttonPressed != 0 && stopMenu == 0)  // we have a state were we process a menu navigation step once and block it for 2 secs
 //   digitalWrite(led13Pin,HIGH);  // set timer led ON
    menuOffTime = menublockTime  + 2000; //start the timer. You can change this blocking time to your convenience but do not make it lower aa 200 msecs
    stopMenu = 1;

    switch (buttonPressed)
    case 1: // Right
      return MW_BTR;
    case 2: // Up
      return MW_BTU;
    case 3: // Down
      return MW_BTD;
    case 4: // Left
      return MW_BTL;
    case 5: // Select or Confirm
      return MW_BTC;
    case 6: // Escape NOT USED
      return MW_BTE;

  if (menuOffTime != 0  &&  menublockTime  > menuOffTime)  //  Reset of the timer so a new menu action can be processed
    buttonAct = 0; // resets the flag 1
    buttonPressed = 0;
    menuOffTime = 0;  // resets timer to zero
    stopMenu = 0;

If I wanted to display dynamic data I would have to use the cast operator at the end of the loop() and I assume that when menu.draw(); runs it will pull in the data. Am I thinking correctly?
9  Using Arduino / Programming Questions / Re: MenWIZ using double instead of float on: January 03, 2013, 11:39:55 am
Oh yea, cast. I remember something about that in my java class. Finally a practical use for it. Adds more variables so my memory creeps up.

I have disabled eeprom and buttons since I am using using an analog input with 5 buttons. The analog sample I found used sprintf to display the usrScreen. I redid that part with sbuf.

I had been attempting to use phi_interface for the analog but the getKey was returning something that was close to the analog values instead of 1-5 like the class appeared to be programmed to return. So I ended up doing the same thing with the custom analog function and deleted phi. That's how I got to 29.2k.

Mega 2560 is in my future. Found some china clones on ebay for $22 last night. I think the real deal is a better choice.

I'll probably end up using some program on the laptop to graph the PID performance so I will be adding Ethernet and sd card. Memory creep.

Is there any method to get 3 variables displayed at the same time in the menu?

10  Using Arduino / Programming Questions / MenWIZ using double instead of float on: January 02, 2013, 10:14:37 pm
Been at this Arduino stuff for about a month. Here is the project info:
Arduino UNO R3
Pololu Micro Serial Servo with 4 servos (expanding to 6 in final version)  on SoftwareSerial pin.
String of 5 Dallas 1 wire DS18B20 temp sensors (expanding to 7 in final version)
Freetronics LCD 16x2 shield with I2C backpack
5 buttons on analog pin
a couple of digital pins OUTPUT to control a fan, furnace and reset Pololu
a couple of digital pins INPUT to check if furnace is on

What this turns into is a 4 to 6 zone heat controller with PID control of the servos connected to dampers. Fan connected to duct work near the fireplace is turned on by a local temp sensor @ 70 degF or if the furnace is running. It is a functioning system without the menu or analog buttons.

I'm using the following libraries:

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <MENWIZ.h>
#include <PID_v1.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <SoftwareSerial.h>

What I am trying to do is use MenWIZ to display the 6 rooms information on a submenu and on another submenu adjust the 6 rooms setpoints.

My preferred method is to input the same variables that the PID's are using: Setpoint, Input and Output. The unfortunate part is that the PID vars are double types and MenWIZ requires float type. I can easily convert these to float by adding more variables to the program, however, I'm currently at 29,200 bytes and I haven't finished my menu yet. Any ideas on this one?

I'm also trying to display vars on 2 lines like this:
SP: 72       IN: 68
OUT: 95 %    //  this may end up as a 0-255 value instead.

I also need to be able to adjust the setpoint which is a double type.

Stupid question of the day: Since double and float are the same, according to the reference, why is double used so often? I suppose that I could hack the PID library.


11  Using Arduino / Project Guidance / Re: High-speed motor control with ninja-like precision on: December 29, 2012, 02:55:28 pm
Just found this:

It has a Fast Motor Stop command.
12  Using Arduino / Project Guidance / Re: High-speed motor control with ninja-like precision on: December 28, 2012, 01:50:36 pm
Sorry to dig up an old thread. But, I am curious, was this resolved?

I'm not familiar with the Pololu Simple Motor Controller you are using?

Have you tried DC Braking? It sounds like you are just coasting to stop.

Theory and schematic:

A high wattage resistor can be installed in the braking loop if it is a high inertia load or it just plain stops too fast. Of course your motor may not have enough residual energy to work well with braking but it may get the number of encoder changes down to a useable level. You may have to use a relay contact to disconnect the motor from the controller when the brake is applied. The same relay will work N.O. to the brake and N.C. to the controller.

Here is a nice brake controller without relays:
13  Using Arduino / Project Guidance / Re: temperature monitoring alarm system on: December 11, 2012, 02:01:39 pm
In the playground is the ModbusMaster Library.

Google search

These are RS-485 options. You can get RS-485 to Ethernet converters. Where I work we use a RS-485/RS-232 converter then connect to the network with a Lantronix converter. I see they have a new product: for $110
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