NodeMcu TTGO ESP32 Display WiFi+Bluetooth Udviklingsboard

NodeMcu TTGO ESP32 Display WiFi+Bluetooth Udviklingsboard er et board med indbygget ESP32 + Bluetooth. Perfekt til alle IoT projekter.

Tekniske detaljer:

Programmering

Før du kan starte din programmering skal Arduino’s IDE software hentes. Dette program bruges til at programmere chippen.

Download fra dette link: Downlaod

Inden programmeringen kan udfæres skal den rigtige “COM” port findes. Klik “Værktøj/Port” – og vælg COM port.

Installere Driver (CP2104)

På nogle computer skal der ikke bruges en driver da Windows selv finder ud af det. men med en CP2104 USB chip skal computer i nogle tilfælde have en driver den kan downloades her.

Download: CP2104 Driver

Installere ESP package (Arduino IDE)

• Åben Arduino IDE (Download her)
• Klik “Fil/Egenskaber”
• Indtast dette link i feltet “Additionel Board Manager URL’s”
• Link “https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json“
• Klik OK
• Åben “Værktøj/Board/Boards manager” (Lad programmet opdatere)
• Find “ESP32” og installere
• Klik derefter “Værktøj/Board” og find (DOIT ESP32 DEVKIT V1)
• Du er nu klar til at sende en kode

Installere TFT_eSPI Library

• Download library (Download)
• Udpak filer
• Flyt/kopir mappen “TFT_eSPI” til  “libraries” som findes i “Arduino IDE” mappen (C:Program Files (x86)Arduino\libraries)
• Åben Arduino IDE software og klik på “Sketch/Include library”
• Klik nu på “Add Zip. library” og find Zip filen du lige har downloaded.
• Åben “Sketch/Include library/Manage Librarys” for at opdatere library.
• Luk, og åben Arduino IDE programmet. (Genstart programmet)
• Nu er “TFT_eSPI” installeret

Eksempel

Her viser vi et hurtig eksempel på hvordan du får vist et digitalt ur på displayet.

Kode

/*
An example digital clock using a TFT LCD screen to show the time.
Demonstrates use of the font printing routines. (Time updates but date does not.)

For a more accurate clock, it would be better to use the RTClib library.
But this is just a demo.

This examples uses the hardware SPI only. Non-hardware SPI
is just too slow (~8 times slower!)

Based on clock sketch by Gilchrist 6/2/2014 1.0
Updated by Bodmer
A few colour codes:

code color
0x0000 Black
0xFFFF White
0xBDF7 Light Gray
0x7BEF Dark Gray
0xF800 Red
0xFFE0 Yellow
0xFBE0 Orange
0x79E0 Brown
0x7E0 Green
0x7FF Cyan
0x1F Blue
0xF81F Pink

*/

#include <TFT_eSPI.h> // Graphics and font library for ST7735 driver chip
#include <SPI.h>

TFT_eSPI tft = TFT_eSPI(); // Invoke library, pins defined in User_Setup.h

uint32_t targetTime = 0; // for next 1 second timeout

byte omm = 99;
boolean initial = 1;
byte xcolon = 0;
unsigned int colour = 0;

static uint8_t conv2d(const char* p) {
uint8_t v = 0;
if ('0' <= *p && *p <= '9')
v = *p - '0';
return 10 * v + *++p - '0';
}

uint8_t hh=conv2d(__TIME__), mm=conv2d(__TIME__+3), ss=conv2d(__TIME__+6); // Get H, M, S from compile time

void setup(void) {
tft.init();
tft.setRotation(1);
tft.fillScreen(TFT_BLACK);

tft.setTextColor(TFT_YELLOW, TFT_BLACK); // Note: the new fonts do not draw the background colour

targetTime = millis() + 1000;
}

void loop() {
if (targetTime < millis()) {
targetTime = millis()+1000;
ss++; // Advance second
if (ss==60) {
ss=0;
omm = mm;
mm++; // Advance minute
if(mm>59) {
mm=0;
hh++; // Advance hour
if (hh>23) {
hh=0;
}
}
}

if (ss==0 || initial) {
initial = 0;
tft.setTextColor(TFT_GREEN, TFT_BLACK);
tft.setCursor (8, 52);
tft.print(__DATE__); // This uses the standard ADAFruit small font

tft.setTextColor(TFT_BLUE, TFT_BLACK);
tft.drawCentreString("It is windy",120,48,2); // Next size up font 2

//tft.setTextColor(0xF81F, TFT_BLACK); // Pink
//tft.drawCentreString("12.34",80,100,6); // Large font 6 only contains characters [space] 0 1 2 3 4 5 6 7 8 9 . : a p m
}

// Update digital time
byte xpos = 6;
byte ypos = 0;
if (omm != mm) { // Only redraw every minute to minimise flicker
// Uncomment ONE of the next 2 lines, using the ghost image demonstrates text overlay as time is drawn over it
tft.setTextColor(0x39C4, TFT_BLACK); // Leave a 7 segment ghost image, comment out next line!
//tft.setTextColor(TFT_BLACK, TFT_BLACK); // Set font colour to black to wipe image
// Font 7 is to show a pseudo 7 segment display.
// Font 7 only contains characters [space] 0 1 2 3 4 5 6 7 8 9 0 : .
tft.drawString("88:88",xpos,ypos,7); // Overwrite the text to clear it
tft.setTextColor(0xFBE0, TFT_BLACK); // Orange
omm = mm;

if (hh<10) xpos+= tft.drawChar('0',xpos,ypos,7);
xpos+= tft.drawNumber(hh,xpos,ypos,7);
xcolon=xpos;
xpos+= tft.drawChar(':',xpos,ypos,7);
if (mm<10) xpos+= tft.drawChar('0',xpos,ypos,7);
tft.drawNumber(mm,xpos,ypos,7);
}

if (ss%2) { // Flash the colon
tft.setTextColor(0x39C4, TFT_BLACK);
xpos+= tft.drawChar(':',xcolon,ypos,7);
tft.setTextColor(0xFBE0, TFT_BLACK);
}
else {
tft.drawChar(':',xcolon,ypos,7);
colour = random(0xFFFF);
// Erase the old text with a rectangle, the disadvantage of this method is increased display flicker
tft.fillRect (0, 64, 160, 20, TFT_BLACK);
tft.setTextColor(colour);
tft.drawRightString("Colour",75,64,4); // Right justified string drawing to x position 75
String scolour = String(colour,HEX);
scolour.toUpperCase();
char buffer[20];
scolour.toCharArray(buffer,20);
tft.drawString(buffer,82,64,4);
}
}
}

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