I now downgraded the esp32 library to the version you mentioned and that did the trick. Thank you very much. I also want to link this post here: https://forum.arduino.cc/t/downgrade-from-v3-0-x-to-v2-0-x/1272211/2 it explains how to downgrade the version and how to turn off the automatic upgrade sug...

Here is the new code: #define F_XTAL_MHZ 26 void setup() { pinMode(LED_BUILTIN, OUTPUT); Serial.begin(115200); delay(5000); } void loop() { digitalWrite(LED_BUILTIN, HIGH); Serial.println("on"); delay(1000); digitalWrite(LED_BUILTIN, LOW); Serial.println("off"); delay(1000); } and this is what I get...

Thank you for your help. This is what I got during the upload with debugging Sketch uses 306564 bytes (23%) of program storage space. Maximum is 1310720 bytes. Global variables use 20048 bytes (6%) of dynamic memory, leaving 274864 bytes for local variables. Maximum is 294912 bytes. esptool.py v4.8....

Hello there, I am using an ESP32 TTGO Lora Oled V1 and uploaded this simple sketch void setup() { pinMode(LED_BUILTIN, OUTPUT); Serial.begin(115200); delay(5000); } void loop() { digitalWrite(LED_BUILTIN, HIGH); Serial.println("on"); delay(1000); digitalWrite(LED_BUILTIN, LOW); Serial.println("off")...