Repurposing Nano Every code for Nano

Projects General Guidance
1

Hi All. I am repurposing some code written for a Nano Every, to use on a Nano I have available. The Nano is a Chinese clone. I have made a few changes to the code already, specifically changing the software serial ports for the DFPlayer to remove them from TX/RX on the Nano so I can try to debug the thing while connected to the computer. The OLED display code works fine. But the DFPlayer won't play anything, and the trigger buttons on D2 and D3 don't do anything either. D2 is the "fire" button and should change the 128x32 display, but does nothing. D3 also does nothing. So I'm a bit stuck as to what I have got wrong in the code here. Any advice greatly appreciated!
The Code:

// This script is a simple Blaster OS; By default is plays a blast sound and lights red; Pressing the mode change button
// switches to stun; In stun the stun sound plays and lights blue;  
// Ammo count starts at 50 and counts down with bars; At zero empty click plays until mode change button is pressed for reload
// Sounds are read from SD card loaded in DFPLayer mini



#include <Adafruit_NeoPixel.h>
// DFPlayer Mini library that seems to work with all of the DFPlayer Minis
#include <DFPlayerMini_Fast.h>
#include <Arduino.h>
#include <U8g2lib.h>
#include <SoftwareSerial.h>
SoftwareSerial mySerial(4, 5); // RX, TX

#ifdef U8X8_HAVE_HW_SPI
#include <SPI.h>
#endif
#ifdef U8X8_HAVE_HW_I2C
#include <Wire.h>
#endif


//128x32 Ammo display on pins D9 & D10
U8G2_SSD1306_128X32_UNIVISION_F_SW_I2C u8g2(U8G2_R3, /* clock=*/ 9, /* data=*/ 10, /* reset=*/ U8X8_PIN_NONE);   // Adafruit Feather ESP8266/32u4 Boards + FeatherWing OLED
//64x32 Scop display on pins A4 & A5 (native Arduino Every SDA SCL pins)
U8G2_SSD1306_64X32_1F_1_HW_I2C u8g3(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);
// End of constructor list

// pin definitions
//Fire button connects to pin D8
int fire = 2;
//Mode change button connects to pin D3
int modechange = 3;

//Addressable LED data pin D11
#define PIN 11  //LED Data Pin
#define NUM_LEDS 2  //Number of LEDs that will be lit


// global variables
//These are the intial values that the script uses to setup counts for mode changes and fire button presses
int count1 = 1;
int count2 = 1;
int lastButtonState1 = 1;
int lastButtonState2 = 1;
long unsigned int lastPress1;
long unsigned int lastPress2;
volatile int buttonFlag1;
volatile int buttonFlag2;
int debounceTime = 20;
int ammo = 50;

DFPlayerMini_Fast myMP3;


//Define addresable LED variables
Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_LEDS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  // setup pin modes
  pinMode(modechange, INPUT_PULLUP);
  pinMode(fire, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(fire), ISR_button1, CHANGE);
  attachInterrupt(digitalPinToInterrupt(modechange), ISR_button2, CHANGE);
  Serial.begin(9600); // dont forget to set your serial monitor speed to whatever is set here
  Serial.println("Running");
  strip.begin();
  strip.show();
  u8g2.begin();
  u8g3.begin();

  //DFPlayer Setup
  mySerial.begin(9600);
  myMP3.begin(mySerial, true);
  Serial.println("Setting volume to max");
  myMP3.volume(30); // Set volume 0 to 30 (max is 30)

  
  // Ammo Count Boxes
  u8g2.setDrawColor(1);
  u8g2.setFontPosTop();
  u8g2.setFontDirection(0);
  u8g2.clearBuffer();
  u8g2.setFont(u8g2_font_inb19_mn);
  u8g2.setCursor (2, 2);
  u8g2.print(ammo);
  
  //Draw Five Ammo Count Boxes
  u8g2.drawBox(2,110,30,17);
  u8g2.drawBox(2,91,30,17);
  u8g2.drawBox(2,72,30,17);
  u8g2.drawBox(2,53,30,17);
  u8g2.drawBox(2,34,30,17);
  u8g2.sendBuffer();

  //Play initial startup sound
  Serial.println("Play startup sound");
  //Triggers the startup sound to play
  //Format calls the directory on the SD card 01 and the third track; make sure files are named with 001, 002, 003, etc)
  myMP3.play(3);
}

void loop() {
  //Fire button check loop
  u8g3.firstPage(); 
  do {
    int a = random(1, 12);
    int b = random(1, 12);
    int c = random(1, 12);
    int d = random(1, 12);
    int e = random(70, 90);
   
    //Draw Scope
    u8g3.drawCircle(32, 15, 15);//Outer Ring
    u8g3.drawCircle(32, 15, 2);//Inner ring
    u8g3.drawLine(20, 15, 15, 15);//left hash
    u8g3.drawLine(44, 15, 49, 15);//right hash
    u8g3.drawLine(32, 30, 32, 25);//bottom hash
    u8g3.drawLine(32, 1, 32, 5);//top hash
    
    u8g3.setFont(u8g2_font_tom_thumb_4x6_tf);
    u8g3.setCursor (46, 6);
    u8g3.print("TI-23");
    u8g3.setCursor(52, 26);
    u8g3.print("RNG");
    u8g3.setCursor(52, 32);
    u8g3.print(e);
    u8g3.print("m");
    //Top Left Bars
    u8g3.drawLine(1, 1, a, 1);//bar 1
    u8g3.drawLine(1, 3, b, 3);//bar 2
    u8g3.drawLine(1, 5, c, 5);//bar 3
    u8g3.drawLine(1, 7, d, 7);//bar 4
    delay(50);
  } while ( u8g3.nextPage() );
  //Debug statements commented out
  //Serial.print("LastButton:");
  //Serial.println(lastButtonState1);
  if((millis() - lastPress1) > debounceTime && buttonFlag1)
  {
    lastPress1 = millis();   //update lastPress                                                     
    if(digitalRead(fire) == 0 && lastButtonState1 == 1)    //if button is pressed and was released last change
    {
      Serial.println("Fire:");
      count1 = count1 + 1;
      //Serial.println(count1);
      //Blast - subroutine to play blast sound and light
      if (count2 == 1 && ammo != 0){
       colorWipe(0xff,0x00,0x00, 2);
       colorWipe(0x00,0x00,0x00, 2); 
       myMP3.play(1);
      }
      //Stun - Subroutine if in stun mode
      if (count2 == 2 & ammo != 0){
       colorWipe(0x00,0x00,0xff, 2);
       colorWipe(0x00,0x00,0x00, 2); 
       myMP3.play(2);
      }
      //Empty - Subroutine if empty; Plays empty sound until mode button is pressed for reload
      if (ammo == 0){
       Serial.println("Empty");
       myMP3.play(5);
      }


      
      
      
      //Ammo Bar
      //Five bars - Displays five bars on ammo display based on ammo count above 40
      if ((ammo <=50) && (ammo >= 40))
      {
        ammo = ammo - 1;
        //Five ammo count boxes already drawn
        Serial.println("50-40");
        u8g2.setCursor (2, 2);
        u8g2.print(ammo);
        u8g2.sendBuffer();
      }

      //four bars -Displays four bars on ammo display based on ammo count above 30
      if ((ammo <= 39) && (ammo >= 30))
      {
        ammo = ammo - 1;
        //Draw Four Ammo Count Boxes
        Serial.println("39-30");
        u8g2.clearBuffer();
        u8g2.drawBox(2,110,30,17);
        u8g2.drawBox(2,91,30,17);
        u8g2.drawBox(2,72,30,17);
        u8g2.drawBox(2,53,30,17);
        Serial.println(ammo);
        u8g2.setCursor (2, 2);
        u8g2.print(ammo);
        u8g2.sendBuffer();
      }

      //Three bars Displays three bars on ammo display based on ammo count above 20
      if ((ammo <= 29) && (ammo >= 20)) {
        ammo = ammo - 1;
        //Draw Four Ammo Count Boxes
        Serial.println("29-20");
        u8g2.clearBuffer();
        u8g2.drawBox(2,110,30,17);
        u8g2.drawBox(2,91,30,17);
        u8g2.drawBox(2,72,30,17);
        Serial.println(ammo);
        u8g2.setCursor (2, 2);
        u8g2.print(ammo);
        u8g2.sendBuffer();
      }

      //Two bars Displays on bar on ammo display based on ammo count above 10
      if ((ammo <= 19) && (ammo >= 10)) {
        ammo = ammo - 1;
        //Draw Four Ammo Count Boxes
        Serial.println("19-10");
        u8g2.clearBuffer();
        u8g2.drawBox(2,110,30,17);
        u8g2.drawBox(2,91,30,17);
        Serial.println(ammo);
        u8g2.setCursor (2, 2);
        u8g2.print(ammo);
        u8g2.sendBuffer();
      }

      //One bars
      if ((ammo <= 9) && (ammo >= 1)) {
        ammo = ammo - 1;
        //Draw Four Ammo Count Boxes
        u8g2.clearBuffer();
        u8g2.drawBox(2,110,30,17);
        Serial.println(ammo);
        u8g2.setCursor (2, 2);
        u8g2.print(ammo);
        u8g2.sendBuffer();
      }

      //Zero bars
      if ((ammo == 0)) {
        //Draw Four Ammo Count Boxes
        u8g2.clearBuffer();
        Serial.println(ammo);
        u8g2.setCursor (2, 2);
        u8g2.print(ammo);
        u8g2.sendBuffer();
      }
  
      //lastButtonState1 = 0;    //record the lastButtonState
    }
    
    else if(digitalRead(fire) == 1 && lastButtonState1 == 0)    //if button is not pressed, and was pressed last change
    {
      lastButtonState1 = 1;    //record the lastButtonState
    }
    buttonFlag1 = 0;
  }
  //Modechange check loop - checks if mode change button has been pressed
  if((millis() - lastPress2) > debounceTime && buttonFlag2)
  {
    lastPress2 = millis();   //update lastPress                                                     
    if(digitalRead(modechange) == 0 && lastButtonState2 == 1)    //if button is pressed and was released last change
    {
      Serial.println("Mode:");
      //Count2 is used to determin mode 1=kill, 2=stun
      count2 = count2 + 1;
      Serial.println("Count Increase");
      if (count2 == 3) {
        count2 = 1;
      }
      //Play sound for mode change
      if (ammo != 0) {
        myMP3.play(4);
      }
      //Reload Sequence
      if (ammo == 0) {
        Serial.println("Reload");
        myMP3.play(3);
        ammo = 50;
        //Re-Draw Five Ammo Count Boxes for reload
        u8g2.drawBox(2,110,30,17);
        u8g2.drawBox(2,91,30,17);
        u8g2.drawBox(2,72,30,17);
        u8g2.drawBox(2,53,30,17);
        u8g2.drawBox(2,34,30,17);
        u8g2.setCursor (2, 2);
        u8g2.print(ammo);
        u8g2.sendBuffer();
        //Decreases count2 by 1 to prevent mode change on reload
        count2= count2 - 1;
        delay(1000);
      }
      //Serial.println(count2);
      
    
      //lastButtonState2 = 0;    //record the lastButtonState
    }
    
    else if(digitalRead(modechange) == 1 && lastButtonState2 == 0)    //if button is not pressed, and was pressed last change
    {
      lastButtonState2 = 1;    //record the lastButtonState
    }
    buttonFlag2 = 0;
  }
  
}

void ISR_button1()
{
  buttonFlag1 = 1;
}

void ISR_button2()
{
  buttonFlag2 = 1;
}


float SpeedDelay = 0.1;
void colorWipe(byte red, byte green, byte blue, int SpeedDelay) {
  for(uint16_t i=0; i<NUM_LEDS; i++) {
      setPixel(i, red, green, blue);
      showStrip();
      delay(SpeedDelay);
  }
}
void showStrip() {
 #ifdef ADAFRUIT_NEOPIXEL_H
   // NeoPixel
   strip.show();
 #endif
 #ifndef ADAFRUIT_NEOPIXEL_H
   // FastLED
   FastLED.show();
 #endif
}

void setPixel(int Pixel, byte red, byte green, byte blue) {
 #ifdef ADAFRUIT_NEOPIXEL_H
   // NeoPixel
   strip.setPixelColor(Pixel, strip.Color(red, green, blue));
 #endif
 #ifndef ADAFRUIT_NEOPIXEL_H
   // FastLED
   leds[Pixel].r = red;
   leds[Pixel].g = green;
   leds[Pixel].b = blue;

 #endif
}
2

Have you checked that those libraries are correct for the new board?

3

The libraries all appear to be compatible with the Nano. I may try a different DFPlayer library, even though this one is meant to be compatible. I still can’t figure out why the two push buttons don’t do anything.

4

I don't know if a regular nano has enough memory to run two displays.
As is, your sketch claims to use 1900 bytes of statically allocated RAM, AND something calls malloc() as well.

The Nano Every has three times as much RAM. (6k, vs 2k)

Behavior can be quite unpredictable when you exceed the available RAM, and variables start overwriting each other.

5

Hmm. Interesting. The two displays are working as expected, but maybe the nano is having trouble executing other code in the meantime once those are running? I might have to strip everything back and try running each function on its own to see what’s failing. I’m still trying to figure out why the buttons aren’t doing anything as well.

6

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