Closed
Description
Hardware:
Board: ESP32 Dev Module
Core Installation/update date: 12/jul/2017
IDE name: Arduino IDE 1.84
Flash Frequency: 80Mhz
Upload Speed: 921600
Description:
As far as I can see "Serial.available()" no longer works after I updated to "Update IDF to 9a26296" from Sep 12, 2017. As soon as I try to send some chars from the arduino-serial-monitor the sketch hangs!
Sketch:
This is a slightly modified "SerialEvent"-Example from the Arduino-IDE built-in examples.
String inputString = ""; // a String to hold incoming data
boolean stringComplete = false; // whether the string is complete
void setup() {
// initialize serial:
Serial.begin(115200);
// reserve 200 bytes for the inputString:
inputString.reserve(200);
}
void loop() {
// print the string when a newline arrives:
if (stringComplete) {
Serial.println(inputString);
// clear the string:
inputString = "";
stringComplete = false;
}
serialEvent(); //manually calling "void serialEvent()"
Serial.print("loop: "); Serial.println(millis()); //just to show some activity on the serial monitor.
}
/*
SerialEvent occurs whenever a new data comes in the hardware serial RX. This
routine is run between each time loop() runs, so using delay inside loop can
delay response. Multiple bytes of data may be available.
*/
void serialEvent() {
Serial.println("serialEvent"); //show that "void serialEvent()" is really called every loop.
while (Serial.available()) {
Serial.println("inside: \"while (Serial.available())\""); //sketch never reaches this point!
// get the new byte:
char inChar = (char)Serial.read();
// add it to the inputString:
inputString += inChar;
// if the incoming character is a newline, set a flag so the main loop can
// do something about it:
if (inChar == '\n') {
stringComplete = true;
}
}
}Debug Messages:
none