Yesterday, Jak shared with us on the forum his work connecting a CANZERO node to a nice big TFT display.

More precisely, he successfully connected a CANZERO to an Adafruit RA8875 driver board (https://www.adafruit.com/product/1590) and a 7 inch TFT display (https://www.adafruit.com/product/2354).

The demo code shared by Jak below will simply make the screen go fully black or white depending on a message sent on the NoCAN network. It seems easy enough to extend to print text or graphics on the screen based on messages. 

//
// Demo sketch connecting a CANZERO to Adafruit RA8875 graphics driver board connected to a 7 inch 800x480 TFT display
//
// Warning, there is no error handling...
// 
// jak.mang
// 02/17/19

#include <Adafruit_GFX.h>
#include <Adafruit_RA8875.h>
#include <nocan.h>

// Pin Out RA8875 -> CANZERO
// Vin: +5V
// GND: GND
// 3Vo: not connected (or use for the SPI fix circuit described in wiki)
// Lite: not connected
// SCK: SPI SCK
// MISO: SPI MISO (remember that it's not tristate! see SPI fix circuit if you want add some SPI device)
// MOSI: SPI MOSI
// CS: SPI CS Used Pin 7
// RST: Any MCU Pin or 10K resistor tied to 3V3 used Pin 6
// WAIT: Not used
// INT: Any MCU pin used Pin 2

#define RA8875_INT 2 //any pin
#define RA8875_CS 7 //any pin
#define RA8875_RST 6 //any pin

Adafruit_RA8875 tft = Adafruit_RA8875(RA8875_CS,RA8875_RST);

void setup() {

    NocanChannelId cid;

    if (tft.begin(RA8875_800x480)) {
        tft.displayOn(true);
        tft.GPIOX(true); // Enable TFT - display enable tied to GPIOX
        tft.PWM1config(true, RA8875_PWM_CLK_DIV1024); // PWM output for backlight
        tft.PWM1out(255);

        tft.fillScreen(RA8875_BLACK);
        tft.fillScreen(RA8875_WHITE);   
    }
    Nocan.open();
    Nocan.registerChannel("display", &cid);
    Nocan.subscribeChannel(cid);
    pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {

    NocanMessage msg;

    Nocan.receiveMessage(&msg);

    if (msg.data[0] == 'o') {
        // Turn on LED
        digitalWrite(LED_BUILTIN, HIGH);
        // Turn screen black
        tft.fillScreen(RA8875_BLACK);
    }
    else if (msg.data[0] == 'x') {
        // Turn off LED
        digitalWrite(LED_BUILTIN, LOW);
        // Turn screen white
        tft.fillScreen(RA8875_WHITE);
    }
}