ESP NodeMCU Serial.available() ?

Projects Programming
1

Ive been using ESP for a few small proijects (WiFi based)
Serial.print() etc work fine, but I recently wanted to use local commands with Serial.read()

BUT !
The code compiles normally - the program runs the other stuff normally (Blynk based), but no code inside the Serial.available() block runs when I send chars to the USB port.

Any thoughts?

Serial.begin();
	  :::
if (Serial.available()) {
	Serial.print('.');   // <--- to see if anything arrives - NO JOY AT ALL ?!
	char c = Serial.read();	// only recognise lower-case chars
	switch (tolower(c)) {
	  :::
	}
}

Before the 'not just a snippet' request arrives - Serial.begin() is up top, the bitrate is set correctly, and Serial.prints work fine.

2

How do you send the chars to the usb port?

3

I can tell you that there is nothing wrong with this snippet of code beside the fact that it is a snippet.

4

PuTTY

5

Did you turn local line editing off in PuTTY?

6

Yes.
PuTTY sessions are fine - also tested with ‘copper-loopback’.