Add libraries, picocalc notes.

libraries/TFT_eSPI/examples/Smooth Fonts/LittleFS/Print_Smooth_Font/Print_Smooth_Font.ino

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+/*
+  Sketch to demonstrate using the print class with smooth fonts
+
+  Sketch is written for a 240 x 320 display
+
+//  Upload the fonts and icons to LittleFS (must set at least 1M for LittleFS) using the
+//  "Tools"  "ESP8266 LittleFS Data Upload" menu option in the IDE.
+//  To add this option follow instructions here for the ESP8266:
+//  https://github.com/earlephilhower/arduino-esp8266littlefs-plugin
+
+  New font files in the .vlw format can be created using the Processing
+  sketch in the library Tools folder. The Processing sketch can convert
+  TrueType fonts in *.ttf or *.otf files.
+
+  The library supports 16 bit Unicode characters:
+  https://en.wikipedia.org/wiki/Unicode_font
+
+  The characters supported are in the in the Basic Multilingual Plane:
+  https://en.wikipedia.org/wiki/Plane_(Unicode)#Basic_Multilingual_Plane
+
+  Make sure all the display driver and pin connections are correct by
+  editing the User_Setup.h file in the TFT_eSPI library folder.
+
+  #########################################################################
+  ###### DON'T FORGET TO UPDATE THE User_Setup.h FILE IN THE LIBRARY ######
+  #########################################################################
+*/
+
+// Font files are stored in Flash FS
+#include <FS.h>
+#include <LittleFS.h>
+#define FlashFS LittleFS
+
+// Graphics and font library
+#include <TFT_eSPI.h>
+#include <SPI.h>
+
+TFT_eSPI tft = TFT_eSPI();  // Invoke library
+
+// -------------------------------------------------------------------------
+// Setup
+// -------------------------------------------------------------------------
+void setup(void) {
+  Serial.begin(115200); // Used for messages
+
+  tft.init();
+  tft.setRotation(1);
+
+  if (!LittleFS.begin()) {
+    Serial.println("Flash FS initialisation failed!");
+    while (1) yield(); // Stay here twiddling thumbs waiting
+  }
+  Serial.println("\n\Flash FS available!");
+
+  listFiles(); // Lists the files so you can see what is in the SPIFFS
+
+}
+
+// -------------------------------------------------------------------------
+// Main loop
+// -------------------------------------------------------------------------
+void loop() {
+  // Wrap test at right and bottom of screen
+  tft.setTextWrap(true, true);
+
+  // Name of font file (library adds leading / and .vlw)
+  String fileName = "Final-Frontier-28";
+
+  // Font and background colour, background colour is used for anti-alias blending
+  tft.setTextColor(TFT_WHITE, TFT_BLACK);
+
+  // Load the font
+  tft.loadFont(fileName, LittleFS);
+
+  // Display all characters of the font
+  tft.showFont(2000);
+
+  // Set "cursor" at top left corner of display (0,0)
+  // (cursor will move to next line automatically during printing with 'tft.println'
+  //  or stay on the line is there is room for the text with tft.print)
+  tft.setCursor(0, 0);
+
+  // Set the font colour to be white with a black background, set text size multiplier to 1
+  tft.setTextColor(TFT_WHITE, TFT_BLACK);
+
+  // We can now plot text on screen using the "print" class
+  tft.println("Hello World!");
+
+  // Set the font colour to be yellow
+  tft.setTextColor(TFT_YELLOW, TFT_BLACK);
+  tft.println(1234.56);
+
+  // Set the font colour to be red
+  tft.setTextColor(TFT_RED, TFT_BLACK);
+  tft.println((uint32_t)3735928559, HEX); // Should print DEADBEEF
+
+  // Set the font colour to be green with black background
+  tft.setTextColor(TFT_GREEN, TFT_BLACK);
+  tft.println("Anti-aliased font!");
+  tft.println("");
+
+  // Test some print formatting functions
+  float fnumber = 123.45;
+
+  // Set the font colour to be blue
+  tft.setTextColor(TFT_BLUE, TFT_BLACK);
+  tft.print("Float = ");       tft.println(fnumber);           // Print floating point number
+  tft.print("Binary = ");      tft.println((int)fnumber, BIN); // Print as integer value in binary
+  tft.print("Hexadecimal = "); tft.println((int)fnumber, HEX); // Print as integer number in Hexadecimal
+
+  // Unload the font to recover used RAM
+  tft.unloadFont();
+
+  delay(10000);
+}
+
+
+// -------------------------------------------------------------------------
+// List files in ESP8266 or ESP32 SPIFFS memory
+// -------------------------------------------------------------------------
+void listFiles(void) {
+  Serial.println();
+  Serial.println("Flash FS files found:");
+
+  fs::Dir dir = LittleFS.openDir("/"); // Root directory
+  String  line = "=====================================";
+
+  Serial.println(line);
+  Serial.println("  File name               Size");
+  Serial.println(line);
+
+  while (dir.next()) {
+    String fileName = dir.fileName();
+    Serial.print(fileName);
+    int spaces = 25 - fileName.length(); // Tabulate nicely
+    if (spaces < 0) spaces = 1;
+    while (spaces--) Serial.print(" ");
+    fs::File f = dir.openFile("r");
+    Serial.print(f.size()); Serial.println(" bytes");
+    yield();
+  }
+
+  Serial.println(line);
+
+  Serial.println();
+  delay(1000);
+}
+
+// -------------------------------------------------------------------------