Serial.available() not working properly

[VitorBoss]

Looking on SerialUART.cpp the function is returning a bool condition instead os number of available bytes, a lot of libs use that like Nexion. This is the current code:

int HardwareSerial::available() {
    return rxEnd != rxStart;
}

This is the fix:

int HardwareSerial::available() {
    //return rxEnd != rxStart;
    int size = (rxEnd % BUFFER_SIZE) - (rxStart % BUFFER_SIZE);
    if (size < 0) size += BUFFER_SIZE;
    return size;
}

Tested and working properly now.

[VitorBoss]

Updated code, now working with Nextion

[Tjeerdie]

Hi, The current version does not have this fix yet. Manually adding the this code to the core works fine! I had problems with a project and this little thing. Can you please add the fix to the master branch?

[VitorBoss]

int HardwareSerial::available() { if (rxEnd >= rxStart) return (rxEnd - rxStart); return BUFFER_SIZE + rxEnd - rxStart; }

That work better