Esp01s led not blinking

1

I can successfully flash some esp01s boards using this config:

[env:esp01]
platform = espressif8266
board = esp01
framework = arduino

IIUC the board is basically the same as the esp01 - except that it only has a single LED.

Since the blue LED should be available on pin 2, I tried this blink program:

#include "Arduino.h"

#define LED 2

void setup()
{
  pinMode(LED, OUTPUT);
}

void loop()
{
  digitalWrite(LED, HIGH);
  delay(1000);
  digitalWrite(LED, LOW);
  delay(1000);
}

But no matter whether it’s pin 1 or pin 2, the LED refuses to blink.
It does blink during the flashing though.

Could this be a problem with the board definition?

2

Does it work in the Arduino IDE? Setting the flash mode e.g. is very important and in PlatformIO should be set exactly equal.

3

Funny enough. So far I could not manage to upload via the Arduino IDE.
There is only the generic profile and it has plentiful options to tweak.