Serial1.read() does not work. UART can only write, not read.

[specternecter]

Operating System

Windows 11

IDE version

1.8.19

Board

ItsyBitsy nRF52840 Express

BSP version

1.6.0

Sketch

/*********************************************************************
This is an example for our Feather Bluefruit modules

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*********************************************************************/

/*

• This sketch demonstrate how to use Hardware Serial1 along with
• native USB Serial on Bluefruit nRF52840.
• Note: Bluefruit nRF52832 does not support Serial1
  */

#include <Arduino.h>
#include <Adafruit_TinyUSB.h> // for Serial

void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(115200);
while ( !Serial ) delay(10); // for nrf52840 with native usb

Serial.println("Goodnight moon!");

// set the data rate for the SoftwareSerial port
//mySerial.begin(9600);
//mySerial.println("Hello, world?");

Serial1.begin(115200);
Serial1.println("Hello, world?");
}

void loop() // run over and over//
{
if (Serial1.available())
Serial.write(Serial1.read());

if (Serial.available())
Serial1.write(Serial.read());
}

What happened ?

Anything written on Serial will print to Serial1. Anything written on Serial1 does nothing on Serial. The example sketch clearly does not work, even though it should, because this is a fundamental sketch.

How to reproduce ?

Run the Serial1_test example.

Debug Log

No response

Screenshots

No response