Hi there, ESP32-C3, VSCode. I am used to work with AT(X)mega and PIC32 microcontrollers in C. For ATXmega, all I need to do is to configure the UART by writing few registers and write the interrupt handler like this: ISR(USARTC1_RXC_vect) { // Interrupt handler code } As a beginner with ESP32, I wou...