Carlos Silva
Published © GPL3+

16x2 LCD Backpack with Enclosure for the Onion Omega

This is a 3D printable backpack module using ATmega328 that includes an enclosure for all the components. It allows the LCD to be online.

IntermediateWork in progress4 hours10,002

Things used in this project

Hardware components

Arduino UNO
Arduino UNO
×1
Expansion Dock
Onion Corporation Expansion Dock
×1
Microchip ATmega328
×1
Capacitor 22 pF
Capacitor 22 pF
×2
16 MHz Crystal
16 MHz Crystal
×1
Single Turn Potentiometer- 10k ohms
Single Turn Potentiometer- 10k ohms
×1
Resistor 1k ohm
Resistor 1k ohm
×1
16x2 Character LCD Display HD44780
×1

Software apps and online services

Arduino IDE
Arduino IDE

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)

Story

Read more

Custom parts and enclosures

Backpack Circuit

Backpack Circuit Cover

Bottom Enclosure

Top Enclosure

Small Washer

Schematics

Backpack circuit

Code

ATmega328 Source Code

Arduino
To be uploaded using the Arduino IDE
#include <LiquidCrystal.h>

String display_status = "off"; 
String light_status = "off"; 
String output_status = "off"; 
String marquee_status = "off";
int marquee_max = 1000; 
int marquee_position = 0; 
int input_status = 0; 

int currlin = 0;  
String inputString = "";         // a string to hold incoming data
String inputString2 = "";        // another string to hold incoming data
boolean stringComplete = false;  // whether the string is complete
String temPString = "";  

String inputStringOK = "";
String inputStringOK2 = "";
String inputStringMar = "";
String temPStringVal = "";

unsigned long timer;

// initialize the library with the numbers of the interface pins
//LiquidCrystal(rs, enable, d4, d5, d6, d7);
LiquidCrystal lcd(A5, A3, 13, 12, 11, 10);

void setup() {
  
  pinMode(9, OUTPUT);
  analogWrite(9, 0);
  
  
  Serial.begin(9600);
  // reserve 200 bytes for the inputStrings:
  inputString.reserve(200);
  inputString2.reserve(200);
  
  timer=millis();

              lcd.begin(16, 2);
              lcd.setCursor(0, 0);
              lcd.print("                ");
              lcd.setCursor(0, 1);
              lcd.print("                ");
              lcd.noDisplay();
}

void loop() {
  
  unsigned long mils=millis();
        //Serial.print("+");
        Serial.print("{ \"input_status\": ");
        Serial.print(analogRead(A4));
        Serial.print(", \"output_status\": \"");
        Serial.print(output_status);
        Serial.print("\", \"display_status\": \"");
        Serial.print(display_status);
        Serial.print("\", \"light_status\": \"");
        Serial.print(light_status);
        Serial.println("\" }");
        delay(100);
        Serial.flush();


        if (marquee_status == "on") {
          if (mils-timer>=marquee_max) {
            timer=mils;
            lcd.scrollDisplayLeft();
          }
        }
  
  // print the string when a newline arrives:
  if (stringComplete) {


            temPString = inputString;
            temPString.remove(5);

            
                //lcd.setCursor(0, 0);
                //lcd.print(temPString);

            if (temPString == "wgtmm") {          
              
                lcd.display();
            
                inputString.remove(inputString.length()-1);
                inputString = inputString.substring(5);
                
                inputString2.remove(inputString2.length()-2);
                
                
                while (inputString.length() < 17) inputString = inputString +  " ";
                while (inputString2.length() < 17) inputString2 = inputString2 + " ";

                inputStringOK = inputString;
                inputStringOK2 = inputString2;
              
                lcd.setCursor(0, 0);
                lcd.print(inputString);
                lcd.setCursor(0, 1);
                lcd.print(inputString2);

            }

            if (temPString == "wgtcm") {    
              
                inputString = inputString.substring(5);            
                inputString.remove(inputString.length()-2);


              inputStringMar = inputString;
              inputStringMar.remove(2);

              if (inputString == "Init") {
                lcd.display();
                display_status = "on";
                for (int i=0;i<255;i++) {
                  analogWrite(9, i);
                  delay(2);
                }
                light_status = "on";
              }  

              if (inputString == "dCl") {
                  lcd.display();
                  lcd.setCursor(0, 0);
                  lcd.print("                                                                                ");
                  lcd.setCursor(0, 1);
                  lcd.print("                                                                                ");
              }

              if (inputString == "dOn") {
                if (display_status == "off") {
                  lcd.display();
                  display_status = "on";
                }
              }    

              if (inputString == "dOff") {
                if (display_status == "on") {
                  lcd.noDisplay();
                  display_status = "off";
                }
              }     

              if (inputString == "dTog") {
                if (display_status == "on") {
                  lcd.noDisplay();
                  display_status = "off";
                } else {
                  lcd.display();
                  display_status = "on";
                }
              }  

              if (inputString == "qOn") {
                if (marquee_status == "off") {
                  marquee_status = "on";
                }
              }    

              if (inputString == "qOff") {
                if (marquee_status == "on") {
                  marquee_status = "off";
                  lcd.setCursor(0, 0);
                  lcd.print(inputStringOK);
                  lcd.setCursor(0, 1);
                  lcd.print(inputStringOK2);
                }
              } 

              if (inputStringMar == "mv") {
                temPStringVal = inputString.substring(2);
                marquee_max = temPStringVal.toInt();
              }  

              if (inputString == "lOn") {
                if (light_status == "off") {
                  for (int i=0;i<255;i++) {
                    analogWrite(9, i);
                    delay(2);
                  }
                  light_status = "on";
                }
              }    

              if (inputString == "lOff") {
                if (light_status == "on") {
                  for (int i=255;i>0;i--) {
                    analogWrite(9, i);
                    delay(2);
                  }
                  light_status = "off";
                }
              } 

              if (inputString == "lTog") {
                if (light_status == "on") {
                  for (int i=255;i>0;i--) {
                    analogWrite(9, i);
                    delay(2);
                  }
                  light_status = "off";
                } else {
                  for (int i=0;i<255;i++) {
                    analogWrite(9, i);
                    delay(2);
                  }
                  light_status = "on";
                }
              }

  
            }
            

                inputString = "";
                inputString2 = "";
                stringComplete = false;
                currlin = 0;
                Serial.flush();

            
          }
    
  
  
}



void serialEvent() {
  while (Serial.available()) {
    // get the new byte:
    char inChar = (char)Serial.read();
    // add it to the inputString:

    if (currlin == 0)
    inputString += inChar;
    
    if (currlin == 1)
    inputString2 += inChar;
    // if the incoming character is a newline, set a flag
    // so the main loop can do something about it:
    if (inChar == '*') {
      //stringComplete = true;
      currlin = 1;
    }
    if (inChar == '\n') {
      stringComplete = true;
    }
    
    
  }
}

Onion App

HTML
To be extracted at /www/console/apps
No preview (download only).

lcd-16x2

BatchFile
To be at /usr/sbin with chmod +x (execute permission)
#!/bin/ash
case "$1" in
        clean)
echo "wgtmm*" > /dev/ttyS1
            ;;
         
        lightOn)
echo "wgtcmlOn" > /dev/ttyS1                                  
            ;;

        lightOff)     
echo "wgtcmlOff" > /dev/ttyS1                                 
            ;;    

        lightToggle)    
echo "wgtcmlToggle" > /dev/ttyS1                                 
            ;;    

        textToggle)
echo "wgtcmdToggle" > /dev/ttyS1                                  
            ;;    
 
        textOn)
echo "wgtcmdOn" > /dev/ttyS1
            ;;

        textOff)
echo "wgtcmdOff" > /dev/ttyS1
            ;;

        write)
echo "wgtmm$2                *$3                " > /dev/ttyS1
            ;;
         
        *)
            echo $"Usage: $0 {clean|write}"
            exit 1
 
esac

nasdaq

BatchFile
To be at /usr/sbin with chmod +x (execute permission)
Executed by the cron periodically.
#!/bin/ash
echo wgtcmqOn > /dev/ttyS1
sleep 1
curl -k 'https://query.yahooapis.com/v1/public/yql?q=select%20symbol,%20Change,%20LastTradePriceOnly%20from%20yahoo.finance.quote%20where%20symbol%20in%20(%22INTC%22,%22AAPL%22,%22GOOG%22,%22MSFT%22,%22ADBE%22)&format=json&diagnostics=true&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys&callback=' -H 'Accept-Encoding: gzip, deflate, sdch, br' -H 'Accept-Language: pt-BR,pt;q=0.8,en-US;q=0.6,en;q=0.4,es;q=0.2,ru;q=0.2' -H 'Upgrade-Insecure-Requests: 1' -H 'User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36' -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8' -H 'Cache-Control: max-age=0' -H 'Connection: keep-alive' -o /www/data/nasdaq.json
X=$(sed "s/[,{}]/&\n/g" /www/data/nasdaq.json | awk "/symbol/,/}/ { print }" | grep ":" | grep -v "}" | awk '{$1=$1}1')
count=0
#echo $X
total=""
total2=""
for item in $X
do
  count=$((count+1))
  
  if [ $count -eq 1 ] || [ $count -eq 3 ] || [ $count -eq 5 ] || [ $count -eq 7 ] || [ $count -eq 9 ]
  then
  arr=$(echo $item | tr "\"" "\n")
  #  echo "$arr"
tempTotal=$(echo $item | awk -F'"' '{print $4}')
#echo "$tempTotal"
total="$total$tempTotal    "
#echo $item
  fi
  
  if [ $count -eq 2 ] || [ $count -eq 4 ] || [ $count -eq 6 ] || [ $count -eq 8 ] || [ $count -eq 10 ]
  then
  arr=$(echo $item | tr "\"" "\n")
  #  echo "$arr"
tempTotal=$(echo $item | awk -F'"' '{print $4}')
tempTotal=$(echo $tempTotal | awk '{print substr($0,0,5)}')
#echo "$tempTotal"
total2="$total2$tempTotal   "
#echo $item
  fi

  #echo $count $item
done
#echo "FN"
#echo "$total"
#echo "$total2"
lcd-16x2 write "$total*$total2"

Credits

Carlos Silva

Carlos Silva

2 projects • 7 followers
Hardware and software developer.

Comments

Related channels and tags
  • Arduino
  • Displays
  • Internet of Things
  • Microchip
  • Onion Corporation