Published November 25, 2018

Lytograph - smart wifi display

Lytograph is a smart wifi display for the internet of things.

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Things used in this project

Hardware components

Arduino MKR1000

Adafruit MicroSD card breakout board

Texas Instruments Shift Register- Serial to Parallel

white LED 5mm 20mA

vial glass

wooden plate 34cm x 34cm

beech plate 34cm x 6cm

aluminium bar 32cm

2 pole cable 10cm female to female

Power MOSFET N-Channel

MOSFET P-Channel

Resistor 10k ohm

Adafruit PowerBoost 500 Basic

LiPo Battery

torx screw

Rugged Metal Pushbutton with Green LED Ring - 16mm

Rugged Metal Pushbutton with Blue LED Ring - 16mm

USB Cable, Micro-B to Standard-B Panel Mount Adaptor

Male Header 40 Position 1 Row (0.1")

sealing ring 1cm diameter

micro sd card

Audio jack connector female 3.5 mm

wall mount disc

1N4007 – High Voltage, High Current Rated Diode

Software apps and online services

node.js

react.js

Hand tools and fabrication machines

Laser cutter (generic)

Drill machine + rig

Story

Lytograph is a beautiful minimalistic Internet of Things display. The body is crafted out of solid wood and the display made of indestructible small vial glass pipes. While having this design minded exterior, the Lytograph is powered by state of the art internet technology. On one hand there is a web application delivering all kinds of information, which should be displayed on the Lytograph. This application is free configurable and can also turn off the device during specific times. On the other hand there is the possibility to make direct (peer-to-peer) connections to the device. For example, you can connect with the mobile app to the Lytograph, listen to Spotify and see the music visualized on the screen in real-time. This universal application concept allows to connect the Lytograph to nearly anything with connectivity.

The current state of the project is under development. There are full functional prototypes and a software concept which is already implemented for testing purposes. The main goal is as well to make the Lytograph accessible to the open source community, as to make it possible to cluster devices, so you can use them as bricks to make bigger installations possible.

Get more info on https://www.lytograph.com

More detailled information is in work!

Feel free to ask me anything about the project.

Code

main.cpp

#include <sam.h>
#include <ArduinoJson.h>
#include <RTCZero.h>
#include "Wifi.h"
#include "SerialHandler.h"
#include "SDR.h"
#include "Buttons.h"
#include "Display.h"
#include "Constants.h"

int opMode = MXWifiTransfer;

Display display(Serial);
SDR sd(Serial);
Buttons buttonhandler;
Wifi wifi(Serial);
SerialHandler serialHandler(Serial);

void setup() {

  Serial.begin(9600);

  //sd.deleteConfig();
  sd.setupSD();
  sd.readConfig();
  //sd.printSDStatus();
  buttonhandler.setupButtons();
  display.setupDisplay();

  // Enable clock for TC
  REG_GCLK_CLKCTRL = (uint16_t) (GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK0 | GCLK_CLKCTRL_ID_TCC0_TCC1) ;
  while ( GCLK->STATUS.bit.SYNCBUSY == 1 ); // wait for sync


  // The type cast must fit with the selected timer
  Tcc* TC = (Tcc*) TCC0; // get timer struct

  TC->CTRLA.reg &= ~TCC_CTRLA_ENABLE;   // Disable TC
  while (TC->SYNCBUSY.bit.ENABLE == 1); // wait for sync


  TC->CTRLA.reg |= TCC_CTRLA_PRESCALER_DIV256;   // Set prescaler


  TC->WAVE.reg |= TCC_WAVE_WAVEGEN_NFRQ;   // Set wave form configuration
  while (TC->SYNCBUSY.bit.WAVE == 1); // wait for sync

  TC->PER.reg = 30;              // Set counter Top using the PER register
  while (TC->SYNCBUSY.bit.PER == 1); // wait for sync

  TC->CC[0].reg = 0xFFF;
  while (TC->SYNCBUSY.bit.CC0 == 1); // wait for sync

  // Interrupts
  TC->INTENSET.reg = 0;                 // disable all interrupts
  TC->INTENSET.bit.OVF = 1;          // enable overfollow
  TC->INTENSET.bit.MC0 = 1;          // enable compare match to CC0

  // Enable InterruptVector
  NVIC_EnableIRQ(TCC0_IRQn);

  // Enable TC
  TC->CTRLA.reg |= TCC_CTRLA_ENABLE ;
  while (TC->SYNCBUSY.bit.ENABLE == 1); // wait for sync

  sd.playSequence("/FUNCTION/SEQUENCE/SEQUENCE.OBJ");

  if(autoConnect){
    wifi.wifiConnect();
  }

}

void TCC0_Handler() {

  display.display();

  Tcc* TC = (Tcc*) TCC0;       // get timer struct
  if (TC->INTFLAG.bit.OVF == 1) {  // A overflow caused the interrupt
    TC->INTFLAG.bit.OVF = 1;    // writing a one clears the flag ovf flag
  }

  if (TC->INTFLAG.bit.MC0 == 1) {  // A compare to cc0 caused the interrupt
    TC->INTFLAG.bit.MC0 = 1;    // writing a one clears the flag ovf flag
  }

}

void loop() {

  if(opMode==MXSerialTransfer){
    serialHandler.regularTasks();
  }
  else if(opMode==MXWifiTransfer){
    wifi.regularTasks();
  }

  buttonhandler.regularTasks();

}

Credits

ceberocks

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Lytograph - smart wifi display

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

exterior

bulb dimensions

sideview

Code

main.cpp

Credits

ceberocks

Comments

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Lytograph - smart wifi display

Lytograph - smart wifi display

Things used in this project

Hardware components

Software apps and online services

Hand tools and fabrication machines

Story

Schematics

exterior

bulb dimensions

sideview

Code

main.cpp

Credits

ceberocks

Comments

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