Programming the LilyGo or TTGO T-display using Arduino

 Follow the youtube below to install the necessary board and library (TFT_eSPI) module

Navigate to the TFT_eSPI directory in the library to update the User_Setup_Select.h and comment the general #include <User_Setup.h> and uncomment the #include <User_setups/Setup25_TTGO_T_display.h) for it to compile.

How to Install and Setup TTGO T-Display

ESP32 C3 supermini

 In order for the ESP32 supermini to send data back, need to set the USB CDC on Boot to 'Enable'

 

reference: 

ESP32 interrupt

 https://lastminuteengineers.com/handling-esp32-gpio-interrupts-tutorial/

https://techtutorialsx.com/2017/10/07/esp32-arduino-timer-interrupts/

Watchdog timer

https://docs.espressif.com/projects/arduino-esp32/en/latest/api/timer.html

PID motion

https://www.dfrobot.com/blog-1045.html

ESP32 with HR-oximeter max20102

 https://microcontrollerslab.com/esp32-heart-rate-pulse-oximeter-max30102/

BLE on ESP32

 reference: https://forum.arduino.cc/t/startadvertising-is-not-a-member-of-bledevice/1086837/5

So change this part of your sketch:

#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>
#include <BLE2902.h>

to this:

#include <BLE2902.h>
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>

Submitting values in webpage residing in Arduino platform

 https://randomnerdtutorials.com/esp32-esp8266-input-data-html-form/

PN532 nfc reader on Arduino

  https://how2electronics.com/interfacing-pn532-nfc-rfid-module-with-arduino/

Tested both versions of connection - SPI & IIC which both worked.  Needed to pay attention to comment and uncomment the definition for the nfc:

// Or use this line for a breakout or shield with an I2C connection:

Adafruit_PN532 nfc(PN532_IRQ, PN532_RESET); // seem these IRQ and reset pin assignments doesn't matter of IIC setup