I have one TCS34725 so could not carry out full test but running the following on an ESP32 #include <Wire.h> #include "Adafruit_TCS34725.h" Adafruit_TCS34725 leftColorSensor = Adafruit_TCS34725(TCS34725_INTEGRATIONTIME_180MS, TCS34725_GAIN_16X); TwoWire i2c_left = TwoWire(0); Adafruit_TCS34725 right...

try running https://wokwi.com/projects/350122233155289684 which scans Wire and Wire1 for I2C devices

try // ESP32 timer interrupts - three pulses 100Usec 350uSec 750uSec #define pin 19 hw_timer_t *timer = NULL; // timer ISR invert pin level volatile int counter = 0; void ARDUINO_ISR_ATTR onTimer() { static int timer1=350; counter++; // digitalWrite(pin, !digitalRead(pin)); gpio_set_level((gpio_num_...

only the ESP32 supports Bluetooth Classic 4.2 see https://gist.github.com/sekcompsci/2bf3 ... 4fa819f421

have a look at BLE - File>Examples>BLE>UART

probably simpler to use WiFI e.g. ESP-NOW https://randomnerdtutorials.com/esp-now ... duino-ide/

there have been problems with some libraries with migration from ESP32 Arduino Core 2.x to 3.0 https://docs.espressif.com/projects/arduino-esp32/en/latest/migration_guides/2.x_to_3.0.html you have probably been updated to Core V3.0.7 using Tools>Board>Board Manger try reinstalling V2.0.17 if your pr...

try a web search for ADS1252 Arduino - you will get plenty of links
in particular https://github.com/aeonSolutions/AeonLa ... no-Library

try changing the Partition scheme
click Tools>Board select ESP32 Dev Board under Partition Scheme select Huge App

there are modules with ESP32 and Ethernet on board, e.g. the WT32-eth01https://github.com/egnor/wt32-eth01, the ESP32-Ethernet-Kit v1.2 https://docs.espressif.com/projects/esp ... guide.html, etc

what software are you running on the PC?
how do you tell it which COM port to use?

when connecting microcontrollers to PCs where the Windows COM port or Linux /dev/ttyUSB* port is unknown I usually have the host software (implemented in C++, C#, Java, etc) cycle thru the connected serial ports transmitting a prompt (e.g. a "?") to each device in turn the target device would be pro...