[edr1924]

Chinese 8266 modules like the Wemos D1 mini clones are a black box to me, specs are hard to find

I needed to know the flash memory size and found this Sketch to check that.
I want to use SPIFFS mem for storing graphics etc., learning now how Werk_AG has used it...

more info:
https://www.instructables.com/Using-ESP8266-SPIFFS/

sample output:

Flash real id:  0016405E
Flash real size: 4194304 bytes

Flash ide  size: 4194304 bytes
Flash ide speed: 40000000 Hz
Flash ide mode:  DIO
Flash Chip configuration ok.

Code:

/*
  ESP8266 CheckFlashConfig by Markus Sattler
  This sketch tests if the EEPROM settings of the IDE match to the Hardware
*/

void setup(void) {
  Serial.begin(115200);
}

void loop() {

  uint32_t realSize = ESP.getFlashChipRealSize();
  uint32_t ideSize = ESP.getFlashChipSize();
  FlashMode_t ideMode = ESP.getFlashChipMode();

  Serial.printf("Flash real id:   %08X\n", ESP.getFlashChipId());
  Serial.printf("Flash real size: %u bytes\n\n", realSize);

  Serial.printf("Flash ide  size: %u bytes\n", ideSize);
  Serial.printf("Flash ide speed: %u Hz\n", ESP.getFlashChipSpeed());
  Serial.printf("Flash ide mode:  %s\n", (ideMode == FM_QIO ? "QIO" : ideMode == FM_QOUT ? "QOUT" : ideMode == FM_DIO ? "DIO" : ideMode == FM_DOUT ? "DOUT" : "UNKNOWN"));

  if (ideSize != realSize) {
    Serial.println("Flash Chip configuration wrong!\n");
  } else {
    Serial.println("Flash Chip configuration ok.\n");
  }

  delay(5000);
}